LEVER 6P6211 - Caterpillar

The diagnostic circuit of the implement ECM identifies a system voltage that is below 18 DCV.The possible causes of this diagnostic code are listed:
The system voltage remains low for an extended time after the engine is started.
There is a connection with high impedance between the battery and the ECM.
There is a connection with high impedance between the ECM and system ground.
One set of batteries is disconnected with the key in the ON position. Also, the engine must not be running.System Response:The machine response is listed:
Implement functions will not work.
The pilot supply on/off solenoid for the implements will de-energize.Note: Ensure that CID 0168 FMI 01 is active and that the diagnostic code is active. Test Step 1. CHECK THE BATTERY VOLTAGE.
Start the engine.
Run the engine at high idle for several minutes.
Measure the battery voltage at the battery posts. Expected Result: The voltage should be greater than 18.0 DCV.Results:
OK - The voltage is greater than 18.0 DCV. The battery voltage is correct. Proceed to test step 2.
NOT OK - The voltage is less than 18.0 DCV. The charging system is not operating correctly. Repair: Check the charging system. Refer to Special Instruction, REHS0354, "Charging System Troubleshooting".STOPTest Step 2. CHECK THE SYSTEM VOLTAGE AT THE ECM.
Run the engine at high idle.
Locate the connector for the implement ECM .
Use 7X-1710 Multimeter Probe Group.
Measure the system voltage between J1-31 (wire 121-RD(Red)) and J1-13 (wire A272-BK(Black)). Measure the voltage between J1-39 (wire 121-RD(Red)) and J1-23 (wire A272-BK(Black)). Measure the system voltage between J1-47 (wire 121-RD(Red)) and J1-57 (wire A272-BK(Black)). Expected Result: The voltage should be less than 18.0 DCV.Results:
OK - Voltage is less than 18.0 DCV. The harness has failed.Repair: Repair the harness or replace the harness.STOP
NOT OK - Voltage is greater than 18.0 DCV. The system voltage is correct. Repair: Ensure that CID 0168 FMI 01 is active. Disconnect the harness connector from the ECM and inspect contacts J1-31, J1-39, J1-47, J1-13, J1-23 and J1-57 for corrosion or debris. Reconnect the harness connector to the ECM. If the diagnostic code is active, replace the ECM. See Testing and Adjusting, "Electronic Control Module (ECM) − Replace".STOP