SOCKET SET 2141151 - Caterpillar

Illustration 1 g01455551
Schematic for the 8 VDC Supply from the VIMS ECMThis diagnostic code is associated with the 8 VDC Supply from the VIMS ECM. The 8 volt sensor power supply provides power for the following: Implement Oil Temperature Sensor, Ambient Air Temperature Sensor, Front Brake Oil Pressure Sensor, Rear Brake Oil Pressure Sensor, Steering Oil Pilot Pressure Sensor, Front Axle Oil Temperature Sensor, Rear Axle Oil Temperature Sensor and Steering Oil Temperature Sensor.The CID 0041 FMI 03 diagnostic code is activated when the ECM detects that the voltage of the 8 volt power supply circuit is higher than 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.Note: 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 connections in the circuit are clean, secure and in good condition. 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. Clear any created diagnostic codes after the original diagnostic code has been corrected.System Response:A Level 2 warning will be generated. Any sensor that uses this supply is disabled.Test Step 1. CHECK THE VOLTAGE AT THE SENSORS
Turn the disconnect switch and the key start switch to the OFF position.
The 8 volt sensor power supply provides power for the following: Implement Oil Temperature Sensor, Ambient Air Temperature Sensor, Front Brake Oil Pressure Sensor, Rear Brake Oil Pressure Sensor, Steering Oil Pilot Pressure Sensor, Front Axle Oil Temperature Sensor, Rear Axle Oil Temperature Sensor and Steering Oil Temperature Sensor. Disconnect these sensors from the machine harness.
Turn the disconnect switch and the key start switch to the ON position.
At the machine harness connector for the one of the sensors, measure the voltage between the supply contact (wire K983-BU) and the return contact (wire J842-BK).
Repeat the same measurement for all other sensors listed above.Expected Result:The voltage measurement is 8.0 0.4 VDC.Results:
OK - The voltage measurement is 8.0 0.4 VDC. The voltage is correct. Reconnect the sensors and switches to the machine harness. Proceed to Test Step 4.
NOT OK - The voltage measurement is greater than 8.0 0.4 VDC. 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 J2, use a 151-6320 Removal Tool or a similar tool to remove the supply wire and socket at contact J2-64 (wire K983-BU) and the return wire and socket at contact J2-19 (wire J842-BK) from the connector. The machine harness connector J2 remains connected to the ECM.
Turn the disconnect switch and the key switch to the ON position.
Use the multimeter probes in order to make contact on the ECM