RING-RETAINING 1020786 - Caterpillar

Illustration 1 g01270366
Connections of the articulate left solenoid This diagnostic code is associated with the articulate left solenoid. The FMI 06 diagnostic code is activated when the Implement ECM detects an above normal current for the solenoid circuit. The Implement ECM provides a PWM signal to the solenoid in order to provide proportional control of the solenoid. The electrical current of the PWM signal is varied by the ECM, based on the input command that is received from the position sensor of the articulation lever. The sensor is located in the assembly of the left joystick.The following conditions could cause this diagnostic code to be activated:
The energize circuit of the solenoid is shorted to ground.
The solenoid has failed.
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. Inspect the connections for the following:
Connections are clean.
Connections are secure.
Connections are 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. Clear these created diagnostic codes when the original diagnostic code has been corrected. Note: The resistance of the solenoid coil should be 8.7 0.4 ohms at 25 °C (77 °F).Test Step 1. CHECK THE SOLENOID
Turn the disconnect switch to the ON position.
Turn the key start switch to the ON position.Note: Do not start the engine.
Observe the status of the diagnostic code.
Disconnect the solenoid with the active diagnostic code from the machine harness. Expected Result:The active CID 2171 FMI 06 diagnostic code changes to a CID 2171 FMI 05 diagnostic code when the solenoid is disconnected.Results:
OK - The active CID 2171 FMI 06 diagnostic code changes to a CID 2171 FMI 05 diagnostic code when the solenoid is disconnected. The circuit is correct.Repair: The solenoid has failed. Repeat this test "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid.STOP
NOT OK - The CID 2171 FMI 06 remains active when the solenoid is disconnected. The solenoid is not causing the problem. Proceed to Test Step 2.Test Step 2. CHECK THE ENERGIZE CIRCUIT OF THE SOLENOID FOR A SHORT TO GROUND
Turn the disconnect switch to the OFF position.
Turn the key start switch to the OFF position.
The solenoid remains disconnected from the machine harness.
Disconnect the machine harness of the ECM connectors J1 and J2 from the ECM.
At the machine harness of the ECM connectors, perform the following:
Measure the resistance from the signal contact J1-51 (wire K789-YL) and frame ground.
Measure the resistance from the signal contact J1-51 (wire K789-YL) and all of the other J1 and J2 contacts that are used in the ECM connectors.Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - One or more of the resistance measurements is