HOUSING-AXLE 2064546 - Caterpillar

Illustration 1 g01644953
Schematic for the 8 volt power supplyThis diagnostic code is recorded when the ECM reads the voltage of the 8 volt DC supply circuit (wire R800-OR) as higher than the normal voltage. The following causes could signal this diagnostic code:
The 8 volt DC supply circuit (wire R800-OR) is shorted to the +battery circuit.
The ECM has failed. This is unlikely.Note: Ensure that the CID 0041 FMI 03 is active. This diagnostic code will generate codes for the components that receive 8 volt power.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0041 FMI 03 is active before performing this procedure.Note: Use a digital multimeter for the measurements in this procedure.System Response:When this diagnostic code is active, a Level 2 Warning will occur.Components that receive power from the 8 volt DC supply will not be available.Test Step 1. CHECK THE STATUS OF THE DIAGNOSTIC CODE
Inspect the harness connectors. Clean the contacts of the harness connectors. Check the wires for damage to the insulation that is caused by excessive heat, corrosion, or chafing.
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit.
Reconnect all harness connectors making sure that the connectors are fully seated and the clips for each connector are completely fastened.
Use the Caterpillar Electronic Technician (ET) service tool, if available, in order to perform a "Wiggle Test" on the machine wiring harness. The wiggle test can detect intermittent shorts or opens in the machine wiring harness.
Turn the disconnect switch