Checking Procedures

Usage:

Introduction

NOTE: This manual is divided into the following three main sections:

1. Electronic System Testing And Adjusting

2. Checking Procedures

3. Hydraulic System Testing And Adjusting

NOTE: As a general rule, if there is a doubt as to the cause of a problem, the electronic system should be checked first.

Reference: For information on Systems Operation of the above, make reference to: "Systems Operation, Electronic And Electrical Systems", Form No. SENR5404 and/or "Systems Operation, Hydraulic System", Form No. SENR5495.

This manual contains information on the troubleshooting procedures of the electronic control and hydraulic systems in the 330, 330 L, and 330 LN Excavators. For troubleshooting the engine components, refer to the module Systems Operation, Testing And Adjusting, Basic Engine Components 3306 Engine, Form No. SENR2057.

Harness And Wire Identification

The colors and sizes of wires shown in the Electric Circuit Diagram are identified as described in the following chart:

Example; [308] - BK - (18)

[308] = Circuit identification code.

BK = Wire color.

(18) = Wire size specified by AWG (American Wiring Gauge). If not indicated, wire size is AWG No. 16.

Electrical Components, Connectors, And Harness Location

This section includes information on how to use the separate module "Electric Schematic", Form No. SENR5499 to determine location of the electric components, connectors, and harnesses.

The location charts are made up of electric components, connectors, and harnesses. The views contain general views and area views. Area views include the following:

* Area A: Cab

* Area B: Right console

* Area C: Left console

* Area D: Relay panel

* Area E: Horn compartment

* Area F: Pilot oil manifold compartment

* Area G: Main control valve compartment

Below is a guide to read components and harness/connector location charts.

* Component location chart:

The component location chart uses white circles as location labels in the general and area views. Alphabetical letters in the connector and vehicle location column indicate location in the area views.

* Harness and connector location chart:

The harness and connector location charts use black circles as location labels in the general and area views. Alphabetical letters in the connector and vehicle location column indicate the area views where they are located. the "*" indicates that it is connected to the component in its harness and/or components column.

NOTE: Harnesses in partial electric schematics given in the "Checking Procedures" are identified by A, B, and C, which are also indicated in the general and area views.

NOTE: The material in this module is intended to be used with the separate module, "Electrical Schematic" Form No. SENR5499.

Checking Procedures (Electronic Control System)

Introduction

Problem Description

The problem description indicates problems represented by the character display on the monitor panel.

Solution

The solution provides two types of information;

* Connector check provides information on the connectors that have to be checked before troubleshooting using the checking procedure chart. Check the connectors specified for improper connections. A loose contact between two connectors can be caused by water in the connectors. Check the connectors before troubleshooting.

* Checking procedure chart provides information on troubleshooting problems indicated by the error code on the character display on the monitor panel.

Example Chart

Electronic Control System Checking Procedure Chart
(1) Preparations. (2) Problem description. (3) Error code on character display (Ch. D.). (4) Check items. (5) Probable causes. (6) Solution.

NOTE: The character display on the monitor panel indicates error code on character display (3) assigned for the real time errors and error log, if problem(s) occurs. The charts that follow should be used to troubleshoot problems indicated by error code on character display (3).

Preparations (1) provide information on the preliminary arrangements that must be made before troubleshooting.

Problem description (2) indicates problems shown by the character display on the monitor panel.

Error code on character display (3) indicates specific codes for real time errors and error log. Service Program selection determines the pattern of the character display.

Check items (4) list items that must be checked with a multimeter.

a. In the check items (4), "0Ohms" means "there is continuity", whereas "infinite Delta " means that "there is no continuity".

b. Connector check - [other than()]: 0Ohms.

NOTE: [other than()] means all the terminals and pins except the one specified in ().

The following is an explanation of the terms in "Check items (4)":

Example; (1) - (2) of CONN46M

(1) = Pin number.

- = Short circuit indication.

CONN46 = Connector number.

M = The male (M) or female (F) half of the connector.

Probable causes (5) shows probable cause(s) of a problem.

Solution (6) shows the corrective action that should be taken to solve a particular problem. The statement "Replace" includes "Repair if possible".

When a continuity check is to be performed, "turn the starter switch to the OFF position". This stops the power supply to prevent damage to the tester or short-circuiting the power supply.

When a voltage check is to be made, "turn the starter switch to the ON position" to allow power supply. The engine should be in operation unless otherwise specified. Stable inputs and outputs of controller cannot be obtained without the engine running.

Show/hide table

NOTICE

To avoid damage to electrical components when the power supply is ON, make sure disconnected connectors and wires do not come in contact with the machine.

[Elec #1] Controller Self-Diagnostic LED Display

Controller Compartment
(1) LED lamp. (2) Controller.

[Elec #1-1] Normal

Normal: Green LED lamp (1) comes ON.

[Elec #1-2] Yellow And Green LED Lamp ON

Problem:

Problem in communication line between controller and monitor causes the yellow and green LED lamps to come ON.

Solution:

Check problem according to [Elec #10-1] and [Elec #10-2].

[Elec #1-3] Green And Red LED Lamp ON

Problem:

Problem in controller causes the green LED lamp to come ON in continuous lighting mode and red LED lamp to come ON in continuous lighting mode or flashing mode. In some cases, yellow LED lamp may come ON.

Solution:

Replace the controller.

[Elec #1-4] No Power To Controller And LED Lamps On

Problem:

No power supply to controller causing LED lamp (1) to not come ON.

Solution:

Check problem according to [Elec #1-5].

[Elec #1-5] No Power Supply To Controller

Problem:

No power supply to controller.

Solution:

Check to ensure that CONN1, 3, 5, 10, and 24 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #2-1] PRV Circuit Is Open

Problem:

Proportional reducing valve circuit is open.

Solution:

Check to ensure that CONN56, 8, 1, 9, and 17 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #2-2] PRV Circuit Is Shorted To Body Ground

Problem:

Proportional reducing valve circuit is shorted to body ground.

Solution:

Check to ensure that CONN56, 8, 1, 9, and 17 are properly connected. If problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #2-3] PRV Circuit Is Shorted To Battery Voltage

Problem:

Proportional reducing valve circuit is shorted to battery voltage.

Solution:

Check to ensure that CONN56, 8, 1, 9, and 17 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #3] Engine Speed Sensor Is Open Or Not Installed Correctly

Problem:

Engine speed sensor (magnetic pickup) circuit is open or speed sensor is not installed correctly (engine speed problem).

Solution:

Check to ensure that CONN42, 43, and 2 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #4-1] Travel Pressure Switch Circuit Is Open Or Shorted To Body Ground

Problem:

Travel pressure switch circuit is open or shorted to body ground.

Solution:

Check to ensure that CONN51 and 2 are properly connected. Check to ensure orifice in signal passage to pressure switch is not blocked. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #4-2] Implement/Swing Pressure Switch Circuit Is Open Or Shorted To Body Ground

Problem:

Implement/swing pressure switch circuit is open or shorted to body ground.

Solution:

Check to ensure that CONN52 and 2 are properly connected. Check to ensure orifice in signal passage to pressure switch is not blocked. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #4-3] Boom Raise Pressure Switch Circuit Is Open Or Shorted To Body Ground

Problem:

Boom raise pressure switch circuit is open or shorted to body ground.

Solution:

Check to ensure that CONN59 and 2 are properly connected. Check to ensure orifice in signal passage to pressure switch is not blocked. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #5] Controller Receives Signal Of Engine Speed Other Than Specified "10"

Problem:

Controller receives signal of engine speed other than specified "10" from engine speed dial.

Solution:

Check to ensure that CONN27, 24, 9, and 1 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #6-1] Governor Actuator Feedback Sensor Circuit Is Open Or Shorted To Battery Voltage

Problem:

Governor actuator feedback sensor circuit is open or shorted to battery voltage.

Solution:

Check to ensure that CONN44, 4, and 2 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #6-2] Governor Actuator Feedback Sensor Circuit Is Shorted To Body Ground

Problem:

Governor actuator feedback sensor circuit is shorted to body ground.

Solution:

Check to ensure that CONN44 and 2 are properly connected. If the problem still exits, troubleshoot according to the following checking procedure chart.

[Elec #6-3] Governor Actuator Motor Circuit Is Shorted To Body Ground.

Problem:

Governor actuator motor circuit is shorted to body ground.

Solution:

Check to ensure that CONN44, 8, 1, 9, and 18 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #6-4] Governor Actuator Motor Does Not Rotate Or Governor Actuator Motor Circuit Is Shorted To Battery Voltage

Problem:

Governor actuator motor does not rotate or governor actuator motor circuit is shorted to battery voltage.

Solution:

Check to ensure that CONN44, 8, 1, and 18, and the circuits of speed change switch and governor backup switch are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #6-5] Governor Actuator Motor Circuit Is Open Or Governor Backup Switch Is In "MAN" Position.

Problem:

Governor actuator motor circuit is open or governor backup switch is in "MAN" position.

Solution:

Check to ensure that CONN44, 8, 1, 9, and 18 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #6-6] Governor Actuator Remains Deactivated An Elapse Time Of 2.5 Seconds After Engine Speed Dial Setting

Problem:

Governor actuator remains deactivated an elapse time of 2.5 seconds after engine speed dial has been activated.

Solution:

Troubleshoot according to the following checking procedure chart.

[Elec #7] Low Idle Switch Circuit Is Open Or Shorted To Body Ground

Problem:

Low idle switch circuit is open or shorted to body ground.

Solution:

Check to ensure that CONN61, 25, 9, and 1 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #8-1] Fine Solenoid Valve Return Circuit Is Shorted To Battery Voltage

Problem:

Fine solenoid valve return circuit is shorted to battery voltage.

Solution:

Check to ensure that CONN53 and 2 are properly connected. If the problem still exists even with the correct connections, troubleshoot according to the following checking procedure chart.

[Elec #8-2] Battery Voltage Cable Of Fine Control Solenoid Valve Circuit Is Shorted To Body Ground

Problem:

Battery voltage cable of fine control solenoid valve circuit is shorted to body ground.

Solution:

Check to ensure that CONN53, 4, and 2 are properly connected. If the problem still exists even with the correct connections, troubleshoot according to the following checking procedure chart.

[Elec #8-3] Fine Control Solenoid Valve Circuit Is Open

Problem:

Fine control solenoid valve circuit is open.

Solution:

Check to ensure that CONN53, 4, and 2 are properly connected. If the problem still exists even with the correct connections, troubleshoot according to the following checking procedure chart.

[Elec #8-4] Swing Priority Solenoid Return Circuit Is Shorted To Battery Voltage

Problem:

Swing priority solenoid return circuit is shorted to battery voltage.

Solution:

Check to ensure that CONN54 and 2 are properly connected. If the problem still exists even with the correct connections, troubleshoot according to the following checking procedure chart.

[Elec #8-5] Battery Voltage Cable Of Swing Priority Solenoid Valve Circuit Is Shorted To Body Ground

Problem:

Battery voltage cable of swing priority solenoid valve circuit is shorted to body ground.

Solution:

Check to ensure that CONN54, 4, and 2 are properly connected. If the problem still exists even with the correct connections, troubleshoot according to the following checking procedure chart.

[Elec #8-6] Swing Priority Solenoid Valve Circuit Is Open

Problem:

Swing priority solenoid valve circuit is open.

Solution:

Check to ensure that CONN54, 4, and 2 are properly connected. If the problem still exists even with the correct connections, troubleshoot according to the following checking procedure chart.

[Elec #9-1] Travel Speed Solenoid Valve Return Circuit Is Shorted To Battery Voltage

Problem:

Travel speed solenoid valve return circuit is shorted to battery voltage.

Solution:

Check to ensure that CONN55 and 2 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #9-2] Battery Voltage Cable Of Travel Speed Solenoid Valve Circuit Is Shorted To Body Ground

Problem:

Battery voltage cable of travel speed solenoid valve circuit is shorted to body ground.

Solution:

Check to ensure that CONN55, 4, and 2 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #9-3] Travel Speed Solenoid Valve Circuit Is Open

Problem:

Travel speed solenoid valve circuit is open.

Solution:

Check to ensure that CONN55, 4, and 2 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #10-1] No Power Supply To Monitor

Problem:

No power supply to monitor.

Solution:

Check to ensure that CONN4, 11, 14, and 30 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #10-2] Communication Line Between Controller And Monitor Is Abnormal

Problem:

Communication line between controller and monitor is abnormal.

Solution:

Check to ensure that CONN30, 14, 11, and 1 are properly connected. If the problem still exists, troubleshoot according to the following checking procedure chart.

[Elec #11-1] Chassis Light System Problem

Problem:

Chassis light system problem.

Solution:

Check to ensure that CONN6, 3, and 1 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #11-2] Chassis Light Return Circuit Is Shorted To Battery Voltage

Problem:

Chassis light return circuit is shorted to battery voltage.

Solution:

Check to ensure that CONN3 and 1 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #11-3] Boom Light System Problem

Problem:

Boom light system problem.

Solution:

Check to ensure that CONN38, 6, 3, and 1 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #11-4] Boom Light Return Circuit Is Shorted To Battery Voltage

Problem:

Boom light return circuit is shorted to battery voltage.

Solution:

Check to ensure that CONN3 and 1 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #12-1] Wiper System Problem

Problem:

Wiper system problem.

Solution:

Check to ensure that CONN32, 34, 13, 11, 6, 3, and 1 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #12-2] Wiper Return Circuit Is Shorted To Battery Voltage

Problem:

Wiper return circuit is shorted to battery voltage.

Solution:

Check to ensure that CONN3 and 1 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #12-3] Washer System Problem

Problem:

Washer system problem.

Solution:

Check to ensure that CONN3, 4, 50, and 1 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #12-4] Washer Return Circuit Is Shorted To Battery Voltage

Problem:

Washer return circuit is shorted to battery voltage.

Solution:

Check to ensure that CONN3 and 1 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #13] Engine Oil Pressure Switch Circuit Is Open

Problem:

Engine oil pressure switch circuit is open.

Solution:

Check to ensure that CONN41, 43, and 2 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #14-1] Action Alarm Buzzer Circuit Is Open

Problem:

Action alarm buzzer circuit is open.

Solution:

Check to ensure that CONN31, 14, 11, and 1 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #14-2] Action Alarm Buzzer Circuit Is Shorted To Body Ground

Problem:

Action alarm buzzer circuit is shorted to body ground.

Solution:

Check to ensure that CONN31, 14, 11, and 1 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #14-3] Action Alarm Buzzer Return Circuit Is Shorted To Battery Voltage

Problem:

Action alarm buzzer return circuit is shorted to battery voltage.

Solution:

Check to ensure that CONN31, 14, 11, and 1 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #15-1] Engine Coolant Temperature Sensor Circuit Is Open Or Shorted To Battery Voltage

Problem:

Engine coolant temperature sensor circuit is open or shorted to battery voltage.

Solution:

Check to ensure that CONN46, 4, and 2 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #15-2] Engine Coolant Temperature Sensor Circuit Is Shorted To Body Ground

Problem:

Engine coolant temperature sensor circuit is shorted to body ground.

Solution:

Check to ensure that CONN46, 43, 4, and 2 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #16-1] Hydraulic Oil Temperature Sensor Circuit Is Open Or Shorted To Battery Voltage

Problem:

Hydraulic oil temperature sensor circuit is open or shorted to battery voltage.

Solution:

Check to ensure that CONN57, 4, and 2 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #16-2] Hydraulic Oil Temperature Sensor Circuit Is Shorted To Body Ground

Problem:

Hydraulic oil temperature sensor circuit is shorted to body ground.

Solution:

Check to ensure that CONN57, 4, and 2 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #17-1] Fuel Level Sensor Circuit Is Open Or Shorted To Battery Voltage

Problem:

Fuel level sensor circuit is open or shorted to battery voltage.

Solution:

Check to ensure that CONN49, 50, and 2 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #17-2] Fuel Level Sensor Circuit Is Shorted To Body Ground

Problem:

Fuel level sensor circuit is shorted to body ground.

Solution:

Check to ensure that CONN49, 50, and 2 are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #18-1] Battery Voltage Is Abnormal

Problem:

Battery voltage is abnormal (not within 23 to 32V).

Solution:

Check to ensure that CONN70, 24, 10, 3, 2, and 1, and terminals of alternator, starter switch, breaker, and terminal block are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #18-2] Alternator Terminal R Circuit Is Open

Problem:

Alternator terminal R circuit is open.

Solution:

Check to ensure that CONN43, 2, and terminal R are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #19] Diagnosis Of Backup Switches And Starter Switch.

Disconnect all harnesses from backup switches and starter switch. Check for continuity across terminals of each of the above switches. Any results other than given below indicate that the switch has loose contacts.

[Elec #19-1] Pump Backup Switch

[Elec #19-2] Governor Backup Switch

[Elec #19-3] Engine Speed Change Switch

[Elec #19-4] Starter Switch

[Elec #20] Controller For A Different Machine Is Installed Or A Harness Code Problem

Problem:

Controller for a different machine is installed or a harness code problem.

Solution:

Check to ensure that CONN1 and 58, and ground bolts are properly connected. If the problem still exists, troubleshoot according to the following sequence chart.

[Elec #21] Governor Actuator Feedback Sensor Voltage Is Too Low Or Not Stable

Problem:

Governor actuator feedback sensor voltage is too low ([E 9]) or not stable ([E12]).

Solution:

With the AEC switch in the OFF position, place the engine speed dial at position "10". Check to see if the voltage between terminal 21 of controller connector B and ground is 6.3 to 6.7 V. If the voltage is within 6.3 to 6.7, it is normal. If not, check or replace the governor actuator, as necessary.

NOTE: To check voltages, see in this module, "Controller Connector Terminal Voltage".