COVER-ARMATURE BASE 1W0953 - Caterpillar

Illustration 1 g02139446
The "Fine Swing" solenoid is identified by the arrow in the photograph.
Illustration 2 g02296574
Schematic Of The Fine Swing SolenoidThis diagnostic code is associated with the fine swing solenoid.This diagnostic code is recorded when the ECM reads the current of the solenoid as being below normal.The possible causes are listed:
There is an open in the circuit.
The solenoid has failed.
There is an incorrect attachment code.
The ECM has failed. A failure of the ECM is unlikely.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 machine harness from the solenoid.
At the machine harness connector for the solenoid, place a jumper wire from contact 1 (wire L973-GN) to contact 2 (wire 200-BK).
Observe the status of the diagnostic code.Expected Result:The diagnostic code is active. Then, the diagnostic code changes to FMI 06 as the jumper wire is installed.Results:
YES - The circuit is correct. The solenoid has failed.Repair: Repeat this test "CHECK THE SOLENOID" in order to verify that the solenoid has failed. Replace the solenoid.STOP
NO - The diagnostic code remains active. Proceed to Test Step 2.Test Step 2. CHECK THE SOLENOID CIRCUIT FOR AN OPEN.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the C3 machine harness connector from the Switch Panel.
At the machine harness connector for the solenoid, the jumper wire remains installed.
At C3 machine harness connector for the switch panel, measure the resistance from contact C3-6 (wire L973-GN) to wire 200-BK. Expected Result:The resistance should be less than 5000 ohms.Results:
YES - The resistance is less than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.
NO - The resistance measurement is not correct. There is an open circuit in the machine harness.Repair: The open is in the wire for the solenoid signal or in wire (200-BK) of the machine harness. Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the contacts 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.
Clear all inactive diagnostic codes.
Check if the diagnostic code for the solenoid is active.Expected Result:The diagnostic code is no longer active. Results:
YES - The diagnostic code is no longer active. The diagnostic code does not exist at this time. The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors. Resume normal machine operation.STOP
NO - The diagnostic code has not been corrected.Repair: A failure of the switch panel is unlikely. Exit this procedure and perform this procedure again. Also, recheck if the diagnostic code is active. If the cause of the diagnostic code is not found, replace the switch panel. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace".STOP