VALVE GP-CONTROL 3527142 - Caterpillar

Illustration 1 g01334367
Connections of the blade left raise relief enable solenoid This diagnostic code is associated with the blade left raise relief enable solenoid. The solenoid is connected to an Implement ECM 2 ON/OFF output. The FMI 06 diagnostic code is activated when the Implement ECM detects an above normal current for the solenoid circuit. The Implement ECM 2 will notify the Implement ECM of this condition over the J1939 Data Link. The Implement ECM will activate this diagnostic code.During operation of the blade downforce system, the blade left raise relief enable solenoid is used to enable the blade left raise downforce system.The following conditions could cause this diagnostic code to be activated:
The energize circuit of the solenoid is shorted to a ground source.
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.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 2749 FMI 06 diagnostic code changes to a CID 2749 FMI 05 diagnostic code when the solenoid is disconnected.Results:
OK - The active CID 2749 FMI 06 diagnostic code changes to a CID 2749 FMI 05 diagnostic code when the solenoid is disconnected. The solenoid circuit in the machine harness 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 2749 FMI 06 diagnostic code remains active. Disconnecting the solenoid did not change the status of the active diagnostic code. 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
The solenoid remains disconnected from the machine harness.
Turn the disconnect switch to the OFF position.
Turn the key start switch to the OFF position.
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 J2-5 (wire K831-GY) and frame ground.
Measure the resistance from the signal contact J2-5 (wire K831-GY) and all of the other contacts that are used in J1 and J2 ECM connectors.
While you observe the resistance measurements, wiggle the machine harness connectors for the ECM and the solenoid. Gently pull on the wires and move the wires.Expected Result:Each resistance is greater than 5000 ohms