SHAFT ASSEM. 8M4613 - Caterpillar

Illustration 1 g00419723
Schematic Of The Left Reverse Steering Solenoid
This diagnostic code is recorded when the ECM reads the current of the solenoid as being below normal. There is an open circuit.The possible causes of this diagnostic code are listed:
The circuit of the solenoid is open.
The return circuit of the solenoid is open.
The solenoid has failed.
The ECM has failed. This is unlikely. System Response:When this diagnostic code occurs, a warning (Category 3) is shown on the monitor. The diagnostic code will cause the transmission to shift to NEUTRAL. Limited operation at a reduced speed may be permitted ONLY after returning the speed/direction control lever to the PARK position.Note: Ensure that CID 0470 FMI 05 is on hold and that the diagnostic code indicator shows "SERV CODE". The nominal coil resistance at room temperature is 7.75 ohms.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 is corrected.Test Step 1. CHECK THE SOLENOID.
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
Disconnect the solenoid with the diagnostic code from the machine harness.
At the machine harness connector for the solenoid, place a jumper wire from contact 1 (wire 844-GN(Green)) to contact 2 (wire 975-WH(White)).
Observe the status of the diagnostic code indicator. "SERV CODE" will be showing or the "SERV CODE" will not be showing. Expected Result:The "SERV CODE" blinks on and off as the jumper wire is installed and removed. Results:
YES - The circuit is correct. Repair: The solenoid has failed. Repeat this test step "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid.STOP
NO - The diagnostic code remains active. The jumper wire does not affect the diagnostic code. Proceed to test step 2.Test Step 2. CHECK THE HARNESS FOR AN OPEN.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector D from the ECM.
At the machine harness connector for the solenoid, place a jumper wire from contact 1 (wire 844-GN(Green)) to contact 2 (wire 975-WH(White)).
At the machine harness connector, measure the resistance from signal contact D-4 (wire 844-GN(Green)) to contact D-7 (wire 975-WH(White)) (return wire). Expected Result:The resistance measurement should be less than 5 ohms.Results:
OK - The resistance measurement is less than 5 ohms. The machine harness is correct. Proceed to test step 3.
NOT OK - The resistance measurement is not correct. There is an open circuit in the machine harness.Repair: The open is in wire (844-GN(Green)) or in wire (975-WH(White)) of the machine harness. Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the harness connectors and clean the contacts of the harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Enter the service mode of the Caterpillar Monitoring System and clear all inactive diagnostic codes.
Operate the machine.
Check the status of CID 0470 FMI 05 for the solenoid. The "SERV CODE"