MID 114 - CID 0168 - FMI 03
Conditions Which Generate This Code:
This diagnostic code is recorded when the ECM reads the system voltage as being greater than 31.5 DCV for at least 2 seconds.
The possible causes of this diagnostic code are listed:
- A charging system component has failed.
- The wiring of the machine harness has failed.
- The ECM has failed. This is unlikely.
System Response:
When this diagnostic code is active, the control system will default to the "Auto Not Allowed" state.
Test Step 1. CHECK THE CHARGING SYSTEM.
- Turn the disconnect switch and the key start switch to the ON position.
- View the status of the diagnostic code.
Expected Result:
The diagnostic code is NO longer active.
Results:
- YES - The diagnostic code is NO longer active. Proceed to test step 2.
- NO - The diagnostic code remains active. Proceed to test step 3.
Test Step 2. CHECK THE CHARGING SYSTEM AGAIN.
- Start the engine.
- View the status of the diagnostic code.
Expected Result:
The diagnostic code is NO longer active.
Results:
- YES - The diagnostic code is NO longer active. Watch for a recurrence.STOP
- NO - The diagnostic code is active. The charging system is charging at an excessive voltage.
Repair: Check the charging system. See Special Instruction, REHS0354, "Charging System Troubleshooting" for more information.
STOP
Test Step 3. CHECK THE BATTERY VOLTAGE.
- The engine should not be running.
- At the battery, measure the voltage of the battery.
Expected Result:
The voltage should measure less than 32 DCV.
Results:
- YES - The voltage measures less than 32 DCV. The ECM must be recording this diagnostic code incorrectly. The ECM may have failed.
Repair: It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is NOT found, replace the ECM. See Troubleshooting, "Module - Replace".
STOP
- NO - The voltage measurement is greater than 32 DCV. The charging system is charging at an excessive voltage.
Repair: Check the charging system.
STOP
Caterpillar Information System:
279C, 279C2, 289C, 289C2 and 299C Compact Track Loaders, 287C, 277C, 277C2, 287C2 and 297C Multi Terrain Loaders and 246C, 256C, 262C, 262C2 and 272C Skid Steer Loaders Machine Electronic Control System Diagnostic Code List
279C, 279C2, 289C, 289C2 and 299C Compact Track Loaders, 287C, 277C, 277C2, 287C2 and 297C Multi Terrain Loaders and 246C, 256C, 262C, 262C2 and 272C Skid Steer Loaders Machine Electronic Control System Event Code List
279C, 279C2, 289C, 289C2 and 299C Compact Track Loaders, 287C, 277C, 277C2, 287C2 and 297C Multi Terrain Loaders and 246C, 256C, 262C, 262C2 and 272C Skid Steer Loaders Machine Electronic Control System Diagnostic Capabilities
279C, 279C2, 289C, 289C2 and 299C Compact Track Loaders, 287C, 277C, 277C2, 287C2 and 297C Multi Terrain Loaders and 246C, 256C, 262C, 262C2 and 272C Skid Steer Loaders Machine Electronic Control System Connector Locations
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