LINING 9M7418 - Caterpillar

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Connections of the 8 volt supply
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Location of the machine ECMThis diagnostic code is associated with the 8 volt supply.This diagnostic code is recorded when the ECM detects the voltage of the 8 volt supply above normal.The following conditions could cause this diagnostic code:
The power supply circuit is shorted to a higher voltage source.
The ECM has failed. This is unlikely.Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all of the connections in the circuit are clean and secure. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear the diagnostic codes when the problem has been corrected. Verify that the CID 0041 FMI 03 is active before performing this procedure.System Response:All of the sensors that receive power from the 8 volt supply will be disabled.Test Step 1. CHECK THE VOLTAGE AT THE SENSORS
Turn the disconnect switch and the key start switch to the ON position.
Disconnect the machine harness connector from the sensors.
At the machine harness connector for the sensors, measure the voltage between contact 1 (wire 497-BU) and contact 2 (wire J766-PU).Expected Result:The voltage measurement is 8.0 0.5 DCV.Results:
OK - The voltage measurement is 8.0 0.5 DCV. The voltage is correct. Proceed to Test Step 4.
NOT OK - The voltage measurement is greater than 8.0 0.5 DCV. The measurement is not correct. Proceed to Test Step 2.Test Step 2. CHECK THE POWER SUPPLY AT THE ECM
Turn the disconnect switch and the key start switch to the OFF position.
At ECM connector J1, use a 151-6320 Removal Tool to remove the supply wire and the socket. Remove the wires at contact J1-44 (wire 497-BU) and contact J1-45 (wire J766-PU) from the connector. The machine harness connector J1 remains connected to the ECM.
Turn the disconnect switch and the keyswitch to the ON position.
Use the multimeter probes in order to make contact on the connector pins at the ECM. Measure the voltage at the ECM pins between contact J1-44 and contact J1-45.Expected Result:The voltage measurement is 8.0 0.5 DCV.Results:
OK - The voltage measurement is 8.0 0.5 DCV. The voltage is correct. The ECM power supply is correct. Turn the key start switch and the disconnect switch to the OFF position. Install the wires and sockets that were removed from the J1 connector back into the original locations. Proceed to Test Step 3.
NOT OK - The voltage measurement is greater than 8.0 0.5 DCV. The ECM power supply is not correct.Repair: Prior to replacing an ECM, always contact your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the ECM requires replacement, refer to Troubleshooting, "Electronic Control Module (ECM) - Replace".STOPTest Step 3. CHECK FOR A SHORT CIRCUIT IN THE