MSS3s Machine Security System Caterpillar


ECM Output Driver - Test

Usage:

120G 11W

Theft Deterrent Module ECM

The following is a list of Diagnostic Trouble Codes (DTCs) that are associated with the Theft Deterrent Output Driver for the ECM.

Table 1
Theft Deterrent Module ECM (MID 436) 
DTC  Code Description  System Response 
1391-03  Theft Deterrent Output Driver #1 : Voltage Above Normal   
1391-04  Theft Deterrent Output Driver #1 : Voltage Below Normal   
1392-03  Theft Deterrent Output Driver #2 : Voltage Above Normal   
1392-04  Theft Deterrent Output Driver #2 : Voltage Below Normal   
5217-03  300mA Sourcing Driver Output #3 : Short to battery   
5217-04  300mA Sourcing Driver Output #3 : Short to ground   
5218-03  300mA Sourcing Driver Output #4 : Short to battery   
5218-04  300mA Sourcing Driver Output #4 : Short to ground   
5219-03  300mA Sourcing Driver Output #5 : Short to battery   
5219-04  300mA Sourcing Driver Output #5 : Short to ground   
5220-03  300mA Sourcing Driver Output #6 : Short to battery   
5220-04  300mA Sourcing Driver Output #6 : Short to ground   

This diagnostic code is associated with the output driver of the MSS3s ECM. This code is recorded if voltage is present on the output driver circuit when the MSS is armed. This circuit is not used on all machines.

Note: For CID 1391 output driver #1 check for the presence of wires at contact 11 and contact 58 before you perform the procedure.

Note: For CID 1392 output driver #2 check for the presence of wires at contact 5 and contact 52 before you perform the procedure.

Possible causes for an FMI 03 diagnostic code are:

  • There is a problem with the software in the ECM

  • There is a short to the +battery circuit in the wiring harness

  • The ECM has failed. A failure of the ECM is unlikely

Possible causes for an FMI 04 diagnostic code are:

  • The wiring in the machine harness has failed

  • The driven component in the circuit has failed

  • The ECM has failed. A failure of the ECM is unlikely

Note: The locations of the components of the MSS will vary between machines. If the MSS was installed by a Caterpillar dealer, consult the installation instructions for component locations. If the MSS was an attachment that was installed at the factory, consult the electrical schematic for that machine.

Diagnostic Trouble Code Procedure

Note: Prior to beginning this procedure, inspect the harness connectors that are involved in this circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure, and in good condition. Ensure that the Charging System is functioning properly. Check the wiring harness for pinch points or abrasions. Look for and repair areas that indicate wires are exposed. If a problem with a connection is found, correct the problem and verify that the diagnostic code is active before performing a troubleshooting procedure.

  1. Identify the active FMI code associated with the components.

  2. Determine which code is present and use the list below to determine which procedure to follow.

  • FMI 03 diagnostic code, proceed to Table 2

  • FMI 04 diagnostic code, proceed to Table 3

Table 2
FMI 03 Troubleshooting 
Troubleshooting Test Steps  Values  Results 
1. FLASH THE ECM

A. Load the latest software file for the MSS into the ECM. Refer to Testing and Adjusting, "Electronic Control Module (ECM) - Flash Program".

B. Clear the diagnostic code log.

C. Start the machine and operate the machine.

D. Determine if FMI 03 is present. 

FMI 03 is present. 
OK - FMI 03 is present.

Go to Test Step 2.

NOT OK - The diagnostic code was caused by a problem in the software.

STOP. 
2. TEST THE MACHINE HARNESS

A. The key start switch must be in the OFF position.

B. Disconnect the machine harness from the MSS3s ECM.

C. Measure the voltage between the pins on the connector for the MSS3s ECM.

a. For CID 1391 Driver #1 pins 11 and 58.

b. For CID 1392 Driver #2 pins 5 and 52. 

Voltage is present. 
OK - Voltage is present between the pins. The wiring harness is shorted.

Repair: Repair or replace the machine harness.

STOP.

NOT OK - Voltage is not present between the pins.

Go to Test Step 3. 
3. CHECK THE ECM

A. Remove the pin from the 70 pin connector of the MSS3s ECM.

a. CID 1391 pin 58.

b. CID 1392 pin 52.

B. Reconnect the MSS3s ECM to the system.

C. Use the Cat ® ET to check the diagnostic codes. 

FMI 03 is active. 
OK - FMI 03 is active.

Repair: The MSS3s ECM has an internal failure. Replace the ECM. Refer to Testing and Adjusting, "ECM - Replace". Return the failed ECM to Caterpillar. Enclose a note with the following message: "The ECM has suffered an internal short to battery voltage."

STOP.

NOT OK - FMI 03 is NOT active.

Repair: The MSS3s ECM has an internal failure. Replace the ECM. Refer to Testing and Adjusting, "ECM - Replace". Return the failed ECM to Caterpillar. Enclose a note with the following message: "The ECM has suffered a short to battery voltage in the driver (#1 or #2) circuit."

STOP. 

Table 3
FMI 04 Troubleshooting 
Troubleshooting Test Steps  Values  Results 
1. CHECK THE WIRING HARNESS

A. Disconnect the wiring harness connector from the MSS3s ECM.

B. Measure the resistance between the pin in the wiring harness and a ground on the machine.

a. CID 1391 pin 11 in the wiring harness and a ground.

b. CID 1392 pin 5 in the wiring harness and a ground. 

The resistance is greater than 5000 Ohms. 
OK - The resistance is greater than 5000 Ohms (no continuity). Harness circuit resistance is correct.

Go to Test Step 3.

NOT OK - Resistance is less than 5000 Ohms (continuity). The machine harness is faulty. There is a short between frame ground and the machine harness. The driven component in the circuit may also be bad.

Go to Test Step 2. 
2. CHECK THE COMPONENT

A. Trace the harness to the driven component in the circuit. The component will be a relay or a solenoid.

B. Measure the resistance of the component. Measure the resistance from each terminal to the case of the component. 

The resistance is greater than 5000 Ohms. 
OK -The resistance of the driven component is greater than 5000 Ohms (no continuity). The component is good. The machine harness has failed. There is a short between frame ground and the machine harness.

Repair:Check the harness for signs of damage. Repair or replace the machine harness.

STOP.

NOT OK -Resistance is less than 5000 Ohms (continuity). The driven component has failed.

Repair:Replace the component that has failed.

STOP. 
3. CHECK IF THE DIAGNOSTIC CODE IS STILL ACTIVE

A. Remove the connector from the ECM. Inspect the contacts and clean the contacts of the harness connectors.

B. Reconnect all harness connectors.

C. Turn the key start switch to the ON position.

D. Clear all inactive diagnostic codes.

E. Operate the machine.

F. Determine if FMI 04 is present. 

FMI 04 is present. 
OK - FMI 04 is present.

Repair: The problem has not been corrected. A failure of the ECM is unlikely. Perform the previous Test Steps again. If the cause of the diagnostic code is not found, replace the ECM. See Testing and Adjusting, "ECM - Replace".

STOP.

NOT OK - FMI 04 is not present.

Repair: The diagnostic code is NOT present. The problem does not exist at this time. The initial problem was probably caused by an intermittent short in the wiring harness. Inspect the harness for any signs of damage. If the harness passes through a hole with a grommet, that area of the harness can become chafed. Chaffing may cause an intermittent short. The harness may also be damaged in locations that could pinch the harness. Repair any wiring that could have caused the problem. Resume normal machine operation.

STOP. 

Caterpillar Information System:

M318F, M320F and M322F Wheeled Excavators Machine System Specifications Boom Valve and Lines
MH3022, MH3024 and MH3026 Material Handlers Machine System Specifications Stick - 5.9 m (19.36 ft)
MH3022, MH3024 and MH3026 Material Handlers Machine System Specifications Pilot Lines
M318F, M320F and M322F Wheeled Excavators Machine System Specifications Boom Valve and Lines
MH3022, MH3024 and MH3026 Material Handlers Machine System Specifications Solenoid Valve
MH3022, MH3024 and MH3026 Material Handlers Machine System Specifications Solenoid Valve
MH3022, MH3024 and MH3026 Material Handlers Machine System Specifications Valve and Lines
MH3022, MH3024 and MH3026 Material Handlers Machine System Specifications Stick - 4.8 m (15.75 ft)
MH3022, MH3024 and MH3026 Material Handlers Machine System Specifications Pilot Lines
MH3022, MH3024 and MH3026 Material Handlers Machine System Specifications Pilot Lines
MH3022, MH3024 and MH3026 Material Handlers Machine System Specifications Valve and Lines
MH3022, MH3024 and MH3026 Material Handlers Machine System Specifications Valve and Lines
2015/07/28 A New Plate Assembly for the Belt Guard Is Now Used on 730C and 730C EJECTOR Articulated Truck {1357, 7174}
MH3022, MH3024 and MH3026 Material Handlers Machine System Specifications Boom Valve and Lines
MH3022, MH3024 and MH3026 Material Handlers Machine System Specifications Stick - 4.9 m (16.08 ft)
777E and 777F Off-Highway Truck Power Train Torque Converter Housing
CP44B and CS44B Vibratory Soil Compactors Machine Systems Eccentric Weight Housing - Remove
Installing the 421-0261 Work Tool Kit on Certain Compact Track Loaders and Skid Steer Loaders {1408} Installing the 421-0261 Work Tool Kit on Certain Compact Track Loaders and Skid Steer Loaders {1408}
M318F, M320F and M322F Wheeled Excavators Machine System Specifications Radiator Enclosure
Installing the 421-0265 Work Tool Kit {1408} Installing the 421-0265 Work Tool Kit {1408}
2015/07/10 New and Improved Transmission Assembly Gear Shift Lever Is Now Used On Certain 424B Backhoe Loaders {3065, 3168}
PL72 Pipelayers Power Train Final Drive, Steering Planetary, and Brake (Right Side) - Remove and Install
CCS7 Combination Vibratory Compactors Machine Systems Eccentric Weight Housing - Disassemble
CCS7 Combination Vibratory Compactors Machine Systems Eccentric Weight Housing - Assemble
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.