BRACKET ASSEM. 8H3244 - Caterpillar

Illustration 1 g01307576
Machine ECM 8 VDC Sensor Power Supply connectionsThis diagnostic code is associated with the Machine ECM 8 volt sensor power supply. The 8 volt sensor power supply provides power for the Track Speed Sensors.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.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 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:A level 2 warning will be generated. Any sensor using this is 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 Left and Right Track Speed Sensors.
At the machine harness connector for the Left Track Speed Sensor, measure the voltage between supply contact 1 (wire 497-BU) to return contact 2 (wire J766-PU).
At the machine harness connector for the Right Track Speed Sensor, measure the voltage between supply contact 1 (wire 497-BU) to return contact 2 (wire J766-PU).Expected Result:The voltage measurement is 8.0 0.4 DCV.Results:
OK - The voltage measurement is 8.0 0.4 DCV. The voltage is correct. Proceed