BASE 2G7282 - Caterpillar

Illustration 1 g03062197
24 VDC power connections for the Chassis ECMThis diagnostic code is recorded when the Chassis ECM identifies a system voltage that is above 32 VDC. This diagnostic code can only be activated when the engine is running and the key switch is ON. The code will latch until the ECM is reset. This code will not become active while the engine is OFF. If the code is active, the charging system is charging at an excessive rate.The possible causes of this diagnostic code are listed below:
A charging system component has failed.
The harness wiring has failed.
The Chassis ECM has failed. A failure of the ECM is unlikely. Test Step 1. CHECK THE CHARGING SYSTEM.
Start the engine.
Observe the status of the diagnostic code indicator. Expected Result:The diagnostic code is active.Results:
YES - The diagnostic code is active.Repair: The charging system is charging at an excessive voltage. Check the charging system. See System Operation, SENR2947, "Starting and Charging System".STOP
NO - The diagnostic code is not active. Repair: There is no problem at this time. Watch for a recurrence.STOPTest Step 2. CHECK THE BATTERY VOLTAGE.
The engine is stopped. At the battery, measure the voltage. Expected Result:The voltage is less than 32.5 VDC.Results:
YES - The voltage is less than 32.5 VDC.Repair: A failure of the ECM is unlikely. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, replace the ECM. Prior to replacing an ECM, always contact your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace".STOP
NO - The voltage is not less than 32.5 VDC.Repair: The charging system is charging at an excessive voltage. Check the charging system. See System Operation, SENR2947, "Starting and Charging System".STOP