Using the NEXG4507 3176 Truck Functions ECAP Service Program Module{0781, 0782} Caterpillar

Introduction

The NEXG4507 3176 Service Program Module (SPM) is a service program module for use with the Electronic Control Analyzer Programmer (ECAP).

It provides all of the service functions for the 3176 Engine Control Module (ECM).

Reference: Special Instruction ... SEHS8742, Using the 8T8697 Electronic Control Analyzer Programmer (ECAP)

Reference: Special Instruction ... SEHS8824, 7X1200 Timing Interface Group

Reference: Special Instruction ... SEHS8889, Installing the 8C9995 Mounting Plate Adapter Group on the Electronic Control Analyzer Programmer (ECAP)

Reference: Service Manual (Module) ... SENR3909, Systems Operations Testing And Adjusting, 3176 Diesel Truck Engine

Reference: Service Manual (Module) ... SENR3913, Electronics Troubleshooting, 3176 Diesel Truck Engine

NEXG4507 Contents

(1) NEXG4507 Service Program Module. (2) Operating Manual SEHS8886. Not Shown NEEG2317-02 Pocket Card.

NOTE: The NEEG forms may not be included in automatic updates of NEXG4507.

Glossary

ACSII

American Standard Code for Information Interchange

CSP

Customer Specified Parameter

CYL

Cylinder

DEG C

Degree Centigrade

DEG F

Degree Fahrenheit

ECM

Electronic Control Module

EPROM

Erasable Programmable Read Only Memory

EUI

Electronic Unit Injector

FRC

Fuel Ratio Control

HG

High Gear

HP

Horsepower

Hz

Cycles per Second

ID

Identification

km/h

Kilometers Per Hour

kPa

Kilopascal

LB FT

Pounds Foot

LCD

Liquid Crystal Display

LG1

Low Gear 1

LG2

Low Gear 2

MAX

Maximum

MIN

Minimum or Minute

MPH

Miles Per Hour

Nm

Newton-Meter

NUM

Number

OCCUR

Occurrence

POS

Position

PPM

Pulse Per Mile

PR

Pressure

PSI

Pounds Per Square Inch

PW

Pulse Width

PWM

Pulse Width Modulated

RAM

Random Access Memory

ROM

Read Only Memory

RPM

Revolutions Per Minute

SPC

Specification (Performance Specification)

S/N

Serial Number

SPD

Speed

SPM

Service Program Module

SW

Switch

TEL

Top Engine RPM Limit

TEMP

Temperature

VSL

Vehicle Speed Limit

%

Percent

Specifications

Service Program Module Version: 1.2

NOTE: To check the Service Program Module Version, Release Date, and Literature Form Number, press SHIFT-HELP after moving cursor to 3176 Truck Functions in the Main Menu.

Refer to Available Parameters, in this manual, for a detailed list of available Read, Read and Change, and 3176 Status Parameters.

Engine Fuel Injection Timing Accuracy: ± .60° (six tenths of one degree BTDC) when using the 7X1200 Timing Interface Group.

Engine Fuel Injection Timing Range of Measurement: 0 - 25° (BTDC) when using the 7X1200 Timing Interface Group.

Features

Read and Change Parameters stored in the 3176 ECM.

Display Status of the 3176 System.

Display Diagnostic Message information sent from the 3176 ECM.

Calibrate the Engine Fuel Injection Timing and Boost Sensor used by 3176.

Perform Interactive Diagnosis of injectors by selectively powering or cutting out individual cylinders.

Changes/Additions

Several modifications have been made to the 3176 Truck Functions Service Program Module (SPM) to make it a more effective service tool:

* The SPM name has been changed from 3176 Functions to 3176 Truck Functions.

This will avoid confusion when trying to identify a SPM used with the 3176 Truck Engine or a SPM used with a 3176 engine in a machine application.

* The SPM cannot be used to service other applications, such as 3406B PEEC, to prevent unpredictable data display and erroneous parameter programming.

* New status parameters:

Estimated Fuel Rate

Desired Engine RPM

Total Fuel Consumed

Total Idle Time

* Several fault code names have been modified and fault codes 01, 27, 28, and 51 have been added to clarify diagnostics and improve troubleshooting:

* A new Monitor Throttle Position Sensor Signal function to assist in throttle position sensor adjustment.

* A new Read ECM Memory function to be used under the direction of Caterpillar Service Engineering personnel for unusually difficult troubleshooting.

3176 Service Program Module Installation

Service programs for use with the Electronic Control Analyzer Programmer (ECAP) are provided through Caterpillar Dealers.

The ECAP will be delivered with utility programs for selecting Metric or English display units and routines for basic communication abilities.

The NEXG4507 3176 Functions Service Program Module will need to be installed by you before the 8T8697 ECAP can be used with the 3176 engine.

When service program updates occur, you will be able to install them the same way.

1. Remove eight screws (1) holding cover panel (2) and lift out of case (3).

2. Turn cover panel (2) over for access to the program module sockets on component side (4) of the cover panel (2).

3. Locate an empty program module socket U45, U46, or U47 (5).

If you need to remove a program module from one of these sockets, grip it firmly by tabs (6) and lift it out of the socket with a slight rocking motion.

4. Install service program module (7) into an empty socket.

NOTE: The program modules and sockets are keyed so that they can only be inserted in the correct (seated) position.

5. Reinstall cover panel (2) into case (3) using eight screws (1).

Power and RS-485 Connector

NOTE: Make sure that the engine is STOPPED before performing this procedure.

1. Disconnect 3176 data link connector (1) from truck wiring harness (2).

2. Connect 8T5275 Cable (3) between connectors (1) and (2).

3. Connect the remaining end of 8T5275 Cable (4) to Port #1 on ECAP (5).

7X1200 Timing Interface Group Installation

NOTE: The ECAP (1) must be equipped with an 8C9995 Mounting Plate Adapter Group (2) before installing the 7X1201 EUI Timing Adapter.

If not so equipped the 8C9995 Mounting Plate Adapter Group must be ordered and installed.

1. 7X1201 EUI Timing Adapter. 2. 5P7362 Cable. 3. 6V2197 Transducer. 4. 7X1171 Transducer Adapter. 5. Carrying Case. 6. 7X1787 Foam Block. 7. 7X2068 Foam Block. 8. 7X2069 Foam Block. 9. Special Instruction SEHS8824. 10. NEEG2318 Module Decal. NEEG2319 (Not shown).

NOTE: The installation of the 7X1200 Timing Interface Group is required to Calibrate and Monitor engine fuel injection timing and to display relative injection signal duration.

NOTE: The engine MUST be STOPPED before connecting or installing the 7X1201 EUI Timing Adapter or associated cables and transducers.

1. Install 7X1201 EUI Timing Adapter Module (1) on the ECAP by sliding two tabs (2) on the adapter case into the two slots provided on 8C9995 Mounting Plate Adapter Group (3).

2. Press down, gently, on 7X1201 EUI Timing Adapter Module (1) to connect it to the ECAP Port #3 connector.

3. Secure T7X1201 EUI Timing Adapter Module (1) to the ECAP using Velcro® strap (4).

4. Disconnect wiring harness connector (5) from bulkhead connector (6) at the valve cover base.

5. Connect 7X1170 Cable (7) between connectors (5) and (6).

6. Connect the remaining end of 7X1170 Cable (8) to INJECTION connector (9) on 7X1201 EUI Timing Adapter (1).

NOTE: This completes the installation necessary for using the 7X1200 Timing Interface Group to measure relative Injection Signal Duration.

Refer to Cylinder Cutout/Injection Signal Duration, in this manual, for details of operation.

Proceed with the following Steps 7 - 11 to complete the installation for monitoring and calibrating Dynamic Engine fuel injection Timing.

7. Measure 58.5 mm (2.303") from the tip of the 6V2197 Transducer.

Use a scribe (10) and mark or install a 7X1171 Transducer Adapter sleeve (with the threads pointing away from the tip) on the 6V2197 Transducer at location (11).

NOTE: The 7X1171 Transducer Adapter is not included with the NEXG4507 Service Program Module or the ECAP and must be ordered separately.

8. Remove the fuel injection timing calibration plug from the right side of the engine and install 7X1171 Transducer Adapter sleeve (12) in the timing calibration hole.

9. Install 6V2197 Transducer (13), to the preset depth, into 7X1171 Transducer Adapter sleeve (12) in the timing calibration hole.

10. Connect the phono plug end of 5P7362 Cable (14) to the connector from 6V2197 Transducer (13).

11. Connect the remaining end of 5P7362 Cable (15) to location (16), marked TDC, on the 7X1201 EUI Timing Adapter Module.

Timing Probe location

12. The diagram above shows fuel injection timing probe properly installed.

NOTE: Location (A) is 58.5 mm (2.303") marked with a scribe or 7X1171 Transducer Adapter sleeve.

This completes the installation necessary for using the 7X1200 Timing Interface Group to calibrate and monitor dynamic engine fuel injection timing.

Refer to Calibrate/Monitor/Fuel Injection Timing, in this manual, for details of operation.

Alternate Method to Install 6V2197 Transducer

An optional method of installing the 6V2197 Transducer allows it to be installed by maintaining an accurate distance between the tip of the transducer and the surface of the crankshaft counterweight.

NOTE: This method requires the crankshaft to be turned to a specified position (in degrees) at number one cylinder.

Refer to Service Manual (Module) ... SENR3909, Systems Operations Testing And Adjusting, 3176 Diesel Truck Engine, for the correct procedures and recommended tools.

1. Rotate engine until #1 cylinder is 10 to 90 degrees (B) Before Top Dead Center (BTDC).

This positions the surface of the counterweight in front of the timing calibration hole.

NOTE: Counterweight must be a minimum of 10 degrees BTDC to ensure that the 6V2197 Transducer is positioned on the counterweight surface and not the TDC slot.

2. Insert 6V2197 Transducer until it contacts the surface of the counterweight.

3. Withdraw the transducer 1.00 mm (.0394") as shown (C).

4. Hand tighten nut on 7X1171 Adapter sleeve (12) to firmly hold the 6V2197 Transducer.

RS-232C Printer Connector

The ECAP Port #2 can be used to connect a serial interface printer.

The printer interface provides XON/XOFF software handshake (communication) between the printer and the ECAP.

NOTE: A menu item is provided for printing a list of parameter values. The F6 key can be used to print a copy of the screen display.

Refer to SEHS8742, Using the 8T8697 Electronic Control Analyzer Programmer (ECAP), for the RS-232C Connector Pin definitions.

The default setup, each time the ECAP is activated, for Port #2 is:

Baud rate ... 1200

Parity ... none

Data bits ... 8

Stop bits ... 1

Refer to SEHS8742, for the procedures to change these values.

Using the NEXG4507 3176 Service Program Module

The 3176 Service Program provides an easy to use method for reading, changing, and displaying parameters in the 3176 ECM.

NOTE: Refer to SEHS8742, if you are not familiar with using the ECAP.

All of the functions related to servicing the 3176 ECM are accessed through a series of menu, display, or update routines.

NOTE: Refer to 3176 Screen Map, in this manual, for detailed maps of the ECAP screens.

This map can be used to find out where you are at any given time and how to review and/or access a specified function.

Main Menu

When power is applied to the ECAP it will first display an identifying title screen. It will then present the Main Menu listing all of the major functions provided by the service program modules installed.

One of these functions listed will be the 3176 Truck Functions Service Program.

Select it from the menu list using the UP arrow key, DOWN arrow key, or item number followed by RETURN.

NOTE: If the Main Menu does not appear, refer to SEHS8742, for troubleshooting procedures.

If the Main Menu appears but the 3176 Truck Functions Service Program is not one of the items, refer to Service Program Module Installation, in this manual.

3176 Truck Functions Menu

This menu provides access to all of the 3176 related functions.

1 - Read/Change Parameters: Functions for reading and/or changing parameters that are stored in the 3176 ECM.

2 - Display Status: Functions for displaying the status of the 3176 system.

3 - Display Diagnostic Messages: Functions for displaying diagnostic messages sent from the 3176 ECM.

4 - Calibrate/Monitor Sensors: Functions for monitoring and calibrating sensors used by 3176.

5 - Interactive Diagnostics: Functions for interactively diagnosing 3176 fuel injector operation.

Example ... To display the status of the 3176 ECM:

Select item 2 by pressing the DOWN arrow key once or entering 2.

The block cursor will move to item 2.

* Confirm your selection by pressing RETURN.

Example ... If you want to find out more about a menu item before confirming it:

Press SHIFT-HELP.

A help message will appear on the last line.

Read/Change Parameters Menu

This menu provides access to parameters stored in the 3176 ECM.

1 - Read Customer Specified Parameters: Functions for reading customer specified parameters from the 3176 ECM.

2 - Read/Change Customer Specified Parameters:Functions for reading and/or changing customer specified parameters that are stored in the 3176 ECM.

NOTE: Access to this set of functions may be protected by customer passwords.

3 - Read/Change 3176 System Configuration Parameters: Functions for reading and/or changing 3176 system configuration parameters that are stored in the 3176 ECM.

4 - Print all Parameters: Function for printing a formatted list of all parameters.

Example ... If you wish to read and/or change 3176 ECM system configuration parameters:

Select item 3 by pressing the DOWN arrow key twice or entering 3.

The block cursor will move to item 3.

* Confirm you selection by pressing RETURN.

Read Customer Specified Parameters List

This function displays a list of all of the customer specified parameters.

The list is made up of thirty-nine lines of text with parameters grouped according to function.

The LCD can only display six lines from the list at one time.

To see the other parameters, use the UP arrow and DOWN arrow keys to move up and down through the list.

Each time one of the arrow keys is pressed, the list position is shifted one line.

Parameters which can be changed have a tattletale number following the parameter value on a line.

This number, shown preceded by a #, indicates how many times that parameter has been changed.

Example ... To move down the list:

Press the DOWN arrow key (the DOWN arrow key has been pressed five time).

To move back up the list, press the UP arrow key (the UP arrow key has been pressed twice).

Read/Change Customer Specified Parameters

Customer Specified Parameters are changed by the owner to set up each 3176 engine for its most efficient use.

Unauthorized access to changing these parameters is prevented by passwords programmed by the owner.

If passwords have been programmed into the 3176 ECM you are servicing, you will need to obtain proper passwords from the owner of the engine.

When you reach the Read/Change Customer Specified Parameters Menu, a PASSWORD PROTECTED message will display on the top line of each Read/Change parameter screen.

If no passwords have been programmed, password validation is skipped and the Read/Change Customer Specified Parameters Menu will appear.

Password Validation

Two passwords (up to eight characters each) can be programmed into 3176 ECM to protect the customer specified parameters.

Each character of the password is displayed on the LCD in reverse screen characters.

Press the RETURN key after entering each password to have it checked.

When the correct passwords have been entered the Read/Change Customer Specified Parameters Menu will appear.

If the passwords are not correct, a message is printed on the LCD and you are given another chance at entering them correctly.

Example ... Four characters of the first password have been entered.

... The passwords entered were incorrect.

Access to changing customer parameters will not be allowed until both passwords are entered correctly.

Read/Change Customer Specified Parameters Menu

This menu provides access to the functions which allow you to read and change customer specified parameters in the 3176 ECM.

1 - Engine Power Rating Selection: Function for selecting the engine power rating map code. Various parameters affected by this selection are also shown.

2 - Vehicle ID: Function for reading and changing the vehicle identification.

3 - Vehicle Speed Parameters: Function for reading and changing parameters associated with vehicle speed.

4 - Cruise Control Parameters: Function for reading and changing parameters associated with cruise control.

5 - PTO Governor Parameters: Function for reading and changing parameters associated with the PTO governor.

6 - Engine/Gear Parameters: Function for reading and changing parameters associated with engine rpm limits for specific gear ranges.

7 - Idle Shutdown Parameters: Function for reading and changing the Idle Shutdown Time.

8 - Customer Passwords: Function for reading and changing customer passwords.

Example ... If you wish to change the Engine/Gear RPM limit parameters in the 3176 ECM:

Select item 6 by pressing the DOWN arrow key five times or entering 6.

The block cursor will move to item 6.

* Confirm your selection by pressing RETURN.

Engine Power Rating Selection

This function allows you to select the engine power rating map code.

NOTE: The Engine power rating CANNOT be changed while the engine is RUNNING. If the engine is RUNNING, you will not be able to access this function.

The current rating map code is shown along with the parameters that are affected by it. Also shown, is a tattletale number which indicates how many times it has been changed.

Available power rating parameters may be reviewed. This will allow you to determine the proper power rating for your application, before changing the rating map code used by the 3176 ECM.

To view a specific rating map code and its parameters:

Enter the code number followed by pressing RETURN.

Once you view a different rating code than the one stored in the 3176 ECM, an additional message is added on the LCD.

This message tells you the current rating map code you are viewing and the one still stored in the 3176 ECM.

If you want to change the rating map code stored in the 3176 ECM to the one you are currently viewing:

Move the cursor to the, Change Rating map code, message by pressing the UP arrow key once.

The message will be shown in reverse screen characters.

* Confirm your entry by pressing RETURN.

To insure against accidental programming of parameters in the 3176 ECM, you are asked if you want to make the change.

Press the Y or y key (for yes) followed by RETURN to make the change.

Press any other key followed by RETURN to cancel the change.

Because changes in engine ratings may affect the operation of other systems on the truck, such as the transmission, radiator, ect., a message is displayed to remind you to check the rating for compatibility with those other systems.

This is only a WARNING message and does NOT indicate any error.

The message will be displayed for at least 10 seconds, after which pressing any key will clear it and restore the original rating selection display.

NOTE: Whenever a rating is changed, the Top Engine Limit is automatically changed to the maximum RPM value for that rating.

Read/Change Vehicle Identification

This function allows you to read and change the vehicle identification.

The current vehicle identification is shown along with the tattletale number. This number indicates how many times it has been changed.

To change the vehicle identification, enter a new identification using the keyboard.

When the first key is pressed, the old identification will be cleared from the LCD. The new character will take its place.

Continue entering characters until your new identification is complete.

A message will appear on the LCD if you exceed the maximum allowable number of characters.

* Confirm your entry by pressing RETURN.

Entries may be edited before confirmation by pressing the SHIFT-DEL key. This will clear one character from the end of the entry each time it is pressed.

To insure against accidental programming of parameters in the 3176 ECM, you are asked if you want to make the change.

Press the Y or y key (for yes) followed by RETURN to make the change.

Press any other key followed by RETURN to cancel the change.

Example ... You have begun entering a new vehicle identification and mistakenly pressed two wrong keys:

Press the SHIFT-DEL key twice to clear them from the entry.

You can then continue entering the rest of your new vehicle identification.

Read/Change Vehicle Speed Parameters

This function allows you to read and change parameters affecting vehicle speed.

The current value for the parameters is shown along with the tattletale number. This number indicates how many times it has been changed.

To change the value of one of the parameters:

Move to the parameter by pressing the UP or DOWN arrow keys. Then enter a new value.

When the first key is pressed to enter a new value, the old value will be cleared from the LCD. The first character of the new value will take its place.

Continue entering characters until your new value is complete.

A message will appear on the LCD if you exceed the maximum allowable number of characters.

* Confirm your entry by pressing RETURN.

Entries may be edited before confirmation by pressing the SHIFT-DEL key. This will clear one character from the end of the entry each time it is pressed.

To insure against accidental programming of parameters in the 3176 ECM, you are asked if you want to make the change.

Press the Y or y key (for yes) followed by RETURN to make the change.

Press any other key followed by RETURN to cancel the change.

Example ... If you wish to change the vehicle speed limit from 57 to 56 MPH:

Move to that parameter by pressing the DOWN arrow key once.

Change the value by pressing the 5 key followed by the 6 key.

* Confirm your entry by pressing RETURN.

Press the Y or y (for yes) key followed by RETURN to indicate that you want to change the vehicle speed parameter.

Read/Change Cruise Control Parameters

This function allows you to read and change parameters affecting the cruise control.

The current value of the parameter is shown along with the tattletale number. This number indicates how many times it has been changed.

To change the value of one of the parameters:

Move to the parameter by pressing the UP or DOWN arrow keys.

Enter a new value.

When the first key is pressed to enter a new value, the old value will be cleared from the LCD. The first character of the new value will take its place.

Continue entering characters until your new value is complete.

A message will appear on the LCD if you exceed the maximum allowable number of characters.

* Confirm your entry by pressing RETURN.

Entries may be edited before confirmation by pressing the SHIFT-DEL key. This will clear one character from the end of the entry each time it is pressed.

To insure against accidental programming of parameters in 3176 ECM, you are asked if you want to make the change.

Press the Y or y key (for yes) followed by RETURN to make the change.

Press any other key followed by RETURN to cancel the change.

Example ... If you wish to change the cruise control high speed limit from 56 to 55 MPH:

Move to that parameter by pressing the DOWN arrow key once.

Change the value by pressing the 5 key twice.

* Confirm your entry by pressing RETURN.

Press the Y or y (for yes) key followed by RETURN to indicate that you want to change the high speed limit.

Read/Change PTO Governor Parameters

This function allows you to read and change parameters affecting the PTO governor.

The current value of the parameter is shown along with the tattletale number. This number indicates how many times it has been changed.

To change the value of one of the parameters:

Move to the parameter by pressing the UP or DOWN arrow keys.

Enter a new value.

When the first key is pressed to enter a new value, the old value will be cleared from the LCD. The first character of the new value will take its place.

Continue entering characters until your new value is complete.

A message will appear on the LCD if you exceed the maximum allowable number of characters.

* Confirm your entry by pressing RETURN.

Entries may be edited before confirmation by pressing the SHIFT-DEL key. This will clear one character from the end of the entry each time it is pressed.

To insure against accidental programming of parameters in 3176 ECM, you are asked if you want to make the change.

Press the Y or y key (for yes) followed by RETURN to make the change.

Press any other key followed by RETURN to cancel the change.

Example ... If you wish to change the PTO engine RPM limit from 1500 to 1400 RPM:

Move to that parameter by pressing the DOWN arrow key once.

Change the value by pressing the 1, 4, 0, and 0 keys.

* Confirm your entry by pressing RETURN.

Press the Y or y key (for yes) followed by RETURN to indicate that you want to change the PTO engine RPM parameter.

Read/Change Engine/Gear Parameters

This function allows you to read and change parameters affecting the engine RPM together with several gear range speeds.

The current value of the parameter is shown along with the tattletale number. This number indicates how many times it has been changed.

To change the value of one of the parameters:

Move to the parameter by pressing the UP or DOWN arrow keys.

Enter a new value.

When the first key is pressed to enter a new value, the old value will be cleared from the LCD. The first character of the new value will take its place.

Continue entering characters until your new value is complete.

A message will appear on the LCD if you exceed the maximum allowable number of characters.

* Confirm your entry by pressing RETURN.

Entries may be edited before confirmation by pressing the SHIFT-DEL key. This will clear one character from the end of the entry each time it is pressed.

To insure against accidental programming of parameters in the 3176 ECM, you are asked if you want to make the change.

Press the Y or y key (for yes) followed by RETURN to make the change.

Press any other key followed by RETURN to cancel the change.

Example ... If you wish to change the High Gears RPM Turn-On Speed from 48 to 50 MPH:

Move to that parameter by pressing the DOWN arrow key twice and the RIGHT arrow key once.

Change the value by pressing the 5 key followed by the 0 key.

* Confirm you entry by pressing RETURN.

Press the Y or y key (for yes) followed by RETURN to indicate that you want to change the high gears turn-on speed.

Read/Change Idle Shutdown Timer

This function allows you to read and change the Idle Shutdown Timer.

The current value of the parameter is shown along with the tattletale number. This number indicates how many times it has been changed.

To change the value of the parameter:

Enter a new value.

When the first key is pressed to enter a new value, the old value will be cleared from the LCD. The first character of the new value will take its place.

Continue entering characters until your new value is complete.

A message will appear on the LCD if you exceed the maximum allowed number of characters.

* Confirm your entry by pressing RETURN.

Entries may be edited before confirmation by pressing the SHIFT-DEL key. This will clear one character from the end of the entry each time it is pressed.

To insure against accidental programming of parameters in 3176 ECM, you are asked if you want to make the change.

Press the Y or y key (for yes) followed by RETURN to make the change.

Press any other key followed by RETURN to cancel the change.

Example ... If you wish to change the idle shutdown timer from 10 minutes to 15 minutes:

Change the value by pressing the 1 and 5 keys.

* Confirm your entry by pressing RETURN.

Press the Y or y key (for yes) followed by RETURN to indicate that you want to change the parameter.

Read/Change Customer Passwords

This function allows you to read and change the customer passwords.

The current value of the parameter is shown along with the tattletale number. This number indicates how many times it has been changed.

To change the value of one of the parameters:

Move to the parameter by pressing the UP or DOWN arrow keys.

Enter a new value.

When the first key is pressed to enter a new value, the old value will be cleared from the LCD. The first character of the new value will take its place.

Continue entering characters until your new value is complete.

A message will appear on the LCD if you exceed the maximum allowed number of characters.

* Confirm your entry by pressing RETURN.

Entries may be edited before confirmation by pressing the SHIFT-DEL key. This will clear one character from the end of the entry each time it is pressed.

To insure against accidental programming of parameters in the 3176 ECM, you are asked if you want to make the change.

Press the Y or y key (for yes) followed by RETURN to make the change.

Press any other key followed by RETURN to cancel the change.

Example ... If you wish to change the second password from ARE BEST to RUNGREAT:

Move to that parameter by pressing the DOWN arrow key once.

Change the value by pressing the R, U, N, G, R, E, A, and T keys.

* Confirm your entry by pressing RETURN.

Press the Y or y key (for yes) followed by RETURN to indicate that you want to change the second password.

3176 System Configuration Parameters Menu

This menu provides access to the functions which allow you to read and change 3176 System Configuration parameters stored in the 3176 ECM.

1 - Read 3176 System Configuration Parameters: Function for reading System Configuration Parameters from 3176 ECM.

2 - Read Customer Passwords: Function for reading the customers passwords.

NOTE: Access to this function is protected by factory specified passwords.

3 - Read/Change 3176 System Configuration Parameters: Function for reading and changing 3176 System Configuration parameters.

NOTE: Access to this function is protected by factory specified passwords.

Example ... If you wish to read the customer passwords because you forgot what they are:

Select item 2 by pressing the DOWN arrow key once or by entering 2.

The block cursor will move to item 2.

* Confirm your selection by pressing RETURN.

Read 3176 System Configuration Parameters List

This function displays a list of all of the 3176 System Configuration parameters.

The list is made up of nineteen lines of text. The LCD can only display six lines from the list at one time.

To see the other parameters:

Use the UP arrow and DOWN arrow keys to move up and down through the list.

Each time one of the arrow keys is pressed, the list position is shifted one line.

Parameters which can be changed have a tattletale number following the parameter value on a line.

This number, shown preceded by a #, indicates how many times that parameter has been changed.

Example ... To move down the list:

Press the DOWN arrow key (the DOWN arrow key has been pressed five times) ...

... To move back up the list, press the UP arrow key (the UP arrow key has been pressed twice).

Read Customer Passwords

If the Customer Passwords from a 3176 ECM are lost or forgotten, they can be read using this function.

The Customer Passwords are still protected by a set of factory specified passwords.

Factory Specified Password Validation (For Customer Passwords)

To protect the Customer Passwords from unauthorized access, factory specified passwords are used.

NOTE: Factory specified passwords are obtained by contacting Caterpillar Dealer Marketing, Engine Division, with the following information:

* Engine Serial Number.

* Electronic Control Module Serial Number.

* Vehicle Identification.

* Total Tattletale.

You will then be provided with a set of two (eight character) passwords that are valid until a parameter is changed in the 3176 ECM (indicated by a changed total tattletale number).

When you receive the factory specified passwords, enter them using the keyboard.

Each character of the password is indicated on the LCD in reverse screen characters.

Press the RETURN key after entering each password to have it checked.

When the correct passwords have been entered, you will be able to access the Read Customer Passwords function.

Example ... Four characters of the first password have been entered ...

... The passwords entered were incorrect.

Access to customer passwords will not be allowed until both factory specified passwords are entered correctly.

Read Passwords

This function allows you to read the customer passwords.

This ability is provided for cases where the customers passwords are forgotten or are otherwise not available.

Customer passwords can only be read using this function.

To change them you must use the function Read/Change Customer Passwords in the Read/Change Customer Specified Parameters Menu, in this manual.

Read/Change 3176 System Configuration Parameters

3176 System Configuration Parameters are values which are not changed for normal operation, and should not be changed except when a 3176 engine is rerated to another HP (horse power) family which requires a different personality module along with other iron changes.

They are protected by a different set of passwords, called factory specified passwords.

Factory Specified Password Validation (For 3176 System Configuration)

To protect the 3176 System Configuration parameters from unauthorized changes, factory specified passwords are used.

NOTE: Factory specified passwords are obtained by contacting Caterpillar Dealer Marketing, Engine Division, with the following information:

* Engine Serial Number.

* Electronic Control Module Serial Number.

* Vehicle Identification.

* Total Tattletale.

You will then be provided with a set of two (eight character) passwords that are valid until a parameter is changed in the 3176 ECM (indicated by a changed total tattletale number).

When you receive the factory specified passwords, enter them using the keyboard.

Each character of the password is indicated on the LCD in reverse screen characters.

Press the RETURN key after entering each password to have it checked.

When the correct passwords have been entered, you will be able to access the Read/Change 3176 System Configuration parameters function.

Example ... Four characters of the first password have been entered ...

... The passwords entered were incorrect.

Access to 3176 System Configuration Parameters will not be allowed until both factory specified passwords are entered correctly.

Read/Change Parameters

This function allows you to read and change parameters associated with the configuration of the 3176 ECM.

NOTE: 3176 System Configuration Parameters CANNOT be changed while the engine is RUNNING. If the engine is RUNNING, you will not be able to access this function.

The current value for the parameters is shown along with the tattletale number. This number indicates how many times it has been changed.

To change the value of one of the parameters:

Move to the parameter by pressing the UP or DOWN arrow keys.

Enter a new value.

When the first key is pressed to enter a new value, the old value will be cleared from the LCD. The first character of the new value will take its place.

Continuing entering characters until your new value is complete.

A message will appear on the LCD if you exceed the maximum allowable number of characters.

* Confirm your entry by pressing RETURN.

Entries may be edited before confirmation by pressing the SHIFT-DEL key which will clear one character from the end of the entry each time it is pressed.

To insure against accidental programming of parameters in 3176 ECM, you are asked if you want to make the change.

Press the Y or y key (for yes) followed by RETURN to make the change.

Press any other key followed by RETURN to cancel the change.

Example ... If you wish to change the full torque setting from 10 to 4:

Move to that parameter by pressing the DOWN arrow key once.

Change the value by pressing the 4 key.

* Confirm your entry by pressing RETURN.

Press the Y or y key (for yes) followed by RETURN to indicate that you really wanted to change the full torque setting.

Print all Parameters

This function allows you to print all of the customer specified and 3176 ECM System configuration parameters.

The parameters are listed in a format similar to the Read Parameter List functions, in this manual.

Follow the steps as shown in RS-232C Printer Connector, in this manual, to connect your printer to the ECAP.

You can STOP the printing of the parameter list at any time by pressing any key on the keyboard.

Display Status

This function displays the status of various parameters in the 3176 ECM system.

Parameters in the display are continually updated and are arranged on the LCD in a format called a screen.

Each parameter has a label to identify it and a value displayed under the label. For convenience, five of the six available screens have been predefined with all of the available 3176 ECM status parameters.

To view parameters on different screens:

* Enter the desired screen number using the numeric keys ...

* Or use the Up and Down arrow keys to increment and decrement the screen number by one.

Included on both sides of the top line of the LCD are two special status areas. Messages will appear in reverse screen characters for the following conditions:

* The left side of the screen will display ENGINE SHUTDOWN, TOP ENGINE SPEED LIMIT, VEHICLE SPEED LIMIT and COLD MODE.

* The right side of the screen will display LOW OIL PRESSURE.

Example ... If you want to view Screen 2, press the Down arrow once or enter 2.

Change Display Layout

This function allows you to change the display layout if you do not like the predefined screens provided for you.

NOTE: Any changes made to the display layout of the six status screens are automatically stored in the ECAP memory. The changes are retained even if you exit the function or remove power from the ECAP.

The changes are also automatically recalled from ECAP memory each time the 3176 functions are used.

To access this function:

Press the C key while in the Display Status function.

Three areas of the LCD are used to change the display layout.

NOTE: The area you are working in is indicated by reverse screen characters. When you first enter the function, you will be in the Parameter Location area of Screen 1.

Parameter Location

To define parameter locations:

Select the Parameter Location area by pressing the P or p key.

The current parameter will be highlighted by reverse screen characters.

Use the arrow keys to move to the location where you want a specific parameter to be displayed.

A parameter is chosen by entering the number for the parameter from the Labels of Available Parameters area of the LCD. The previous label is cleared and the number you entered will take its place.

* Confirm your choice by pressing RETURN. The number will be replaced by the new label.

Label number entries may be edited prior to confirmation by pressing the SHIFT-DEL key. This will clear one digit from the end of the number each time it is pressed.

Label numbers can be changed as often as you like.

Each screen can hold a maximum of 10 parameters.

NOTE: In some instances, the maximum number of parameters on a screen may be less than 10. The actual maximum depends on the specified parameters chosen for that screen.

Example ... If you want the current location to be blank, press the 1 key.

* Confirm you entry by pressing RETURN.

Screen Number Selection

To access a different screen and change its layout:

Select the Screen Number Selection area by the pressing S or s key.

The screen number selection area will be highlighted by reverse screen characters.

Enter the screen number (1-6) or use:

* The DOWN arrow key to get to the next screen number.

* The UP arrow key to get to the previous screen number.

Example ... If you want to view Screen 3, press the DOWN arrow key once or enter 3.

Labels of Available Parameters

Labels of parameters available for display are listed in the Labels of Available Parameters area of the LCD.

To access the label list and find a parameter label that is not currently shown:

Select the Available Labels area by pressing the L or I key.

The Labels of Available Parameters area will be highlighted by reverse screen characters.

The list of labels is made up of four lines of labels, four to a line. Two lines from the list can be shown on the LCD at a time.

To see other labels:

Use the UP arrow and DOWN arrow keys to move up and down through the list.

Each time one of the arrow keys is pressed, the list position is shifted one line.

Example ... If you want to see other labels in the list, press the DOWN arrow key to move your position in the list down by one line.

Display Diagnostic Messages Menu

This menu provides access to functions for displaying diagnostic messages received from the 3176 ECM:

1 - Display Current Diagnostic Messages: Function for displaying diagnostic messages sent from the 3176 ECM. Messages are updated as they are received.

2 - Display/Clear Logged Diagnostic Messages:Function for displaying and clearing logged diagnostic messages in the 3176 ECM.

The messages are logged by the 3176 ECM and are retained by it until cleared by a Caterpillar ECAP.

NOTE: Customer Passwords are required to perform this function.

Example ... To display and clear logged diagnostic messages:

Select item 2 by pressing the DOWN arrow key once or entering 2.

The block cursor will move to item 2.

* Confirm your selection by pressing RETURN.

Display Current Diagnostic Messages

This function is used to display current diagnostic messages as they are sent from the 3176 ECM.

The messages are sent to the ECAP as code numbers. When a code number is received, the text for the diagnostic messages is added and both are displayed on the LCD.

With this function, diagnostic messages will appear when a fault or other problem occurs with the 3176 ECM. The message will disappear when they have been corrected.

NOTE: The diagnostic message, 56 - Check Customer Specified Parameters will display the name of any parameter, which has a programming fault, in this function ONLY. Because of the nature and usage of the Display Logged Diagnostic Messages function, ONLY the diagnostic message itself and NOT the parameter name are displayed there.

Included on both sides of the top line of the LCD are two special status areas.

Messages will appear in reverse screen characters for the following conditions:

* The left side of the screen will display ENGINE SHUTDOWN, TOP ENGINE SPEED LIMIT, and VEHICLE SPEED LIMIT.

* The right side of the screen will display LOW OIL PRESSURE.

Six diagnostic messages can appear on the LCD at one time.

If more than six messages are received:

Use the UP arrow and DOWN arrow keys to move up and down through the list.

Each time one of the arrow keys is pressed, the list position is shifted one line.

Example ... To move down the list:

Press the DOWN arrow (the DOWN arrow key has been pressed five times)...

... To move back up the list:

Press the UP arrow key (the UP arrow key has been pressed twice).

Display/Clear Logged Diagnostic Messages

This function is used to display and clear diagnostic message information logged by the 3176 ECM.

The diagnostic information is arranged in a list on the LCD. The diagnostic code number as well as the message text is displayed similarly to the Current Diagnostic Message function.

In addition, the number of occurrences and the diagnostic clock reading for first and last occurrence are displayed.

If the fault is still occurring, the word ACTIVE is added to the end of the line for that diagnostic message.

Diagnostic messages are cleared one at a time from the 3176 ECM memory so that as faults are corrected they may be removed from the list.

The message selected for clearing is indicated by reverse screen characters in the diagnostic code and message text.

Use the UP and DOWN arrow keys to move through the list of messages.

Here the DOWN arrow key has been pressed two times.

Press RETURN to clear the selected message.

Password Validation

If the selected diagnostic message is protected by passwords, a password entry screen will be displayed.

Diagnostic messages are categorized such that diagnostics about the control system itself have no password protection.

Diagnostic messages dealing with improper operation of the engine/truck require customer passwords so that the owner of the truck can be sure that the event is secure.

Press PREVIOUS SCREEN or MAIN MENU keys to exit the password entry screen without clearing the diagnostic message.

Diagnostic messages dealing with abuse or tampering of the 3176 ECM require Caterpillar factory level passwords so that a Caterpillar dealer is properly informed.

Press PREVIOUS SCREEN or MAIN MENU keys to exit the password entry screen without clearing the diagnostic message.

If no passwords are needed or the passwords have been properly entered, the selected diagnostic message is cleared in the 3176 ECM and is removed from the display list.

Once the appropriate passwords have been entered other diagnostic messages with the same password protection level or lower can be cleared without reentering passwords until the Display/Clear Logged Diagnostic Messages function is exited.

Six messages can appear on the LCD at one time.

If more than six messages are received:

Use the UP arrow and DOWN arrow keys to move up and down through the list.

Each time one of the arrow keys is pressed, the list position is shifted one line.

NOTE: Because of the nature and usage of this function:

* If the diagnostic message 56 - Check Customer Specified Parameters occurs, only the diagnostic message itself and NOT the name of the parameter which has a programming fault are displayed here.

Refer to Display Current Diagnostic Messages, in this manual, for this operation.

The passwords entered were incorrect.

When the correct passwords have been entered all of the logged Diagnostic Messages will be cleared from the 3176 ECM.

Calibrate/Monitor Sensors Menu

This menu provides access to functions for calibrating and/or monitoring calibrating engine fuel injection timing and sensors used by 3176.

1 - Calibrate Boost Sensor: Function for calibrating the Boost Sensor used by 3176.

2 - Calibrate/Monitor Timing: Function for monitoring and calibrating 3176 engine fuel injection timing.

3 - Monitor Throttle Position Sensor Signal:Function for monitoring the throttle position sensor signal duty cycle.

NOTE: If the engine is RUNNING, you will NOT be able to access the Boost Sensor Calibration function. A message will be displayed on the LCD as a reminder.

Example ... To calibrate and/or monitor Fuel Injection Timing:

Select item 2 by pressing the DOWN arrow key once or entering 2.

The block cursor will move to item 2.

* Confirm your selection by pressing RETURN.

Calibrate Boost Sensor

This function is used to calibrate the boost sensor used by the 3176.

When this function is accessed, the 3176 automatically calibrates the boost sensor. The ECAP will display a message on the LCD indicating that the calibration is in progress.

When the automatic calibration is complete, the message CALIBRATED! will be displayed confirming the boost sensor is calibrated.

Calibrate/Monitor Fuel Injection Timing

This function provides the ability to monitor desired and actual fuel injection timing and calibrate the 3176 engine to remove any error between the desired and actual timing values.

NOTE: The proper use of this function requires the:

* Installation of a 7X1201 EUI Timing Adapter on the ECAP.

* Installation of a 6V2197 Transducer, Top Dead Center (TDC) probe, in the 3176 engine block.

* Connection of a fuel injection signal T-Harness cable on the valve cover connector.

Refer to Timing Adapter Installation, Alternate Method to Install 6V2197 Transducer and Power and RS-485 Connector, in this manual for details.

When installation is complete, start engine and warm engine to normal operating temperature.

The timing values are represented using a bar graph for desired timing and a tolerance window for actual timing.

Engine RPM is also displayed using a bar graph with a RPM units scale.

If engine fuel injection timing is properly calibrated, the end of the Desired Timing bar graph should stay WITHIN the vertical bars of the Actual Timing tolerance window.

If Desired Timing does not stay WITHIN the vertical bars of the Actual Timing tolerance window, the fuel injection timing should be calibrated.

NOTE: To insure the most accurate fuel injection timing calibration, the engine RPM should be held as steady as possible at approximately 1500 rpm.

This can be performed using the PTO engine governor or a steady foot on the accelerator pedal.

To calibrate, press the space key once.

The ECAP will place the 3176 ECM into the timing calibration mode, indicated by the message CALIBRATING in the upper right corner of the screen.

When calibration is complete, this message changes to CALIBRATED!.

Monitor Throttle Position Sensor Signal

This function displays the duty cycle of the throttle position sensor signal.

The purpose of this function is to assist in the adjustment of the throttle position sensor.

NOTE: This function is not available on pre-1991 engines.

Interactive Diagnostics Menu

This menu provides access to functions for performing interactive diagnostics on the 3176 Truck Engine.

1 - Cylinder Cutout/Injection Signal Duration:Function used to selectively cutout or power individual cylinders and monitor injection signal duration.

2 - Read ECM Memory: Function for examining ECM memory Contents.

Example ... To read the contents of an ECM memory location:

Select item 2 by pressing the DOWN arrow key once or entering 2.

* Confirm your selection by pressing RETURN.

Cylinder Cutout/Injection Duration

This function provides two capabilities:

* Cutout or power the electrical injection signal to each individual cylinder.

* Display the electrical injection signal duration of each cylinder in bar graph form.

These capabilities allow service personnel to diagnose suspected injector problems.

NOTE: For this function to display electrical injection signal duration:

* The 7X1201 EUI Timing Adapter MUST be installed on the 8T8697 ECAP.

* The injection signal T-Harness cable MUST be connected to the valve cover connector.

Refer to Timing Adapter Installation, in this manual, for details.

NOTE: If the 7X1201 EUI Timing Adapter is NOT installed, the function provides for cylinder cutout or power ONLY.

To change the current status of a cylinder, move the cursor, indicated by reverse screen characters, to the desired cylinder:

Press RETURN.

If the cylinder was powered:

* Pressing RETURN will cause it to be cutout.

If the cylinder was cutout:

* Pressing RETURN will cause it to be powered.

NOTE: To allow flexibility in using this function for diagnostic procedures, the status of the cylinders remains as displayed whenever you exit the function.

Any cylinders that are cutout remain cutout until the function is used to power them again or the 3176 ECM is turned OFF and back ON again.

Example ... To cutout cylinder number 3 to check if it is operating properly, move to that cylinder by pressing the DOWN arrow key twice.

Change the status of that cylinder by pressing RETURN.

A THREE CYLINDER CUTOUT message will appear in reverse screen characters in the top left portion of the screen when the engine is in the three cylinder cutout mode.

Read ECM Memory

This function provides the ability to examine the contents of Random Access Memory (RAM).

NOTE: In most circumstances, this function will not be needed. You may be asked to use it as directed by Caterpillar Service Engineering personnel.

Enter the memory address to be examined.

* Confirm your entry by pressing RETURN.

Enter the number of memory bytes to be displayed.

* Confirm your entry by pressing RETURN.

Error Messages

The following chart reflects the possible errors, displayed on the ECAP screen, which may occur during the operation of the NEXG4507 3176 Truck Functions Service Program Module.

The first column is the error message displayed, the second column is a description of the problem (if not explained in the error message) and the third column is the action which you should take to correct the error.

Available Parameters

Read Parameters

Electronic Control Module Serial NumberEngine RetarderEngine RPM at Vehicle Speed LimitEngine Serial NumberFull Load SettingFull Torque SettingHigh Cruise Control Speed Set LimitHigh Gears Engine RPM LimitHigh Gears Turn On SpeedIdle Shutdown TimerLow Cruise Control Speed Set LimitLow Gears #1 Engine RPM LimitLow Gears #1 Turn Off SpeedLow Gears #2 Engine RPM LimitLow Gears #2 Turn Off SpeedLow Idle Engine RPMLow Oil Pressure Engine RPM LimitPeak TorquePeak Torque RPMPersonality Module CodePersonality Module Part NumberPersonality Module Release DatePowerPTO Engine RPM LimitPTO Vehicle Speed LimitRated RPMRating Selection CodeService Tool Serial Numbers for Customer and Configuration ChangesTest Specification (With & W/O BrakeSaver)Top Engine Limit RPM RangeTop Engine RPM LimitTotal TattletaleVehicle IdentificationVehicle Speed CalibrationVehicle Speed Limit

Read and Change Parameters

Customer PasswordsEngine RetarderEngine RPM at Vehicle Speed LimitEngine Serial NumberFull Load SettingFull Torque SettingHigh Cruise Control Speed Set LimitHigh Gears Engine RPM LimitHigh Gears Turn On SpeedIdle Shutdown TimerLow Cruise Control Speed Set LimitLow Gears #1 Engine RPM LimitLow Gears #1 Turn Off SpeedLow Gears #2 Engine RPM LimitLow Gears #2 Turn Off SpeedLow Idle Engine RPMPersonality Module CodePTO Engine RPM LimitPTO Vehicle Speed LimitRating Selection CodeTop Engine RPM LimitVehicle IdentificationVehicle Speed CalibrationVehicle Speed Limit

3176 Status Parameters

The number in parentheses indicate the status parameter label number to be used when changing the status screen layouts.

Boost Pressure (3)Brake Switch (4)Clutch Switch (5)Coolant Level Indication (21)Coolant Temperature (22)Cruise Mode (6)Cruise Set Speed (9)Cruise/PTO Switch (8)Desired Engine RPM (29)Engine Retarder Mode (2)Engine RPM (12)Estimated Fuel Rate (26)FRC Fuel Limit Position (18)Fuel Position (16)Fuel Pressure (24)Idle Shutdown Mode (25)Inlet Air Temperature Indication (23)Oil Pressure (13)Parking Brake Switch (19)PTO Mode (7)PTO Set RPM (15)Rated Fuel Limit Position (17)Resume Switch (10)Set Switch (11)Throtte Position (14)Total Fuel (27)Total Idle Time (28)Vehicle Speed (20)

Service

Units less than one year old will be repaired under warranty (except for abuse). The cost of out-of-warranty repairs will be charged to the owner. Contact Caterpillar Service Technology Group for details.

Use the following list to direct troubleshooting questions and/or information on service and warranty.

Phone - Toll Free Numbers

Outside Illinois ... 1-800-542-8665

Inside Illinois ... 1-800-541-8665

Canada ... 1-800-523-8665

U.S. Mail

United Parcel Service, Emery, etc.

Telex

3176 Screen Map