CONFIGURATION 4634815 - Caterpillar

Illustration 1 g01228667
VPAT blade angle right solenoid connections
Illustration 2 g01228557
VPAT angle pilot manifold located on the right hand fender in front of the hydraulic oil tank (1) Angle right solenoid valve (2) Angle left solenoid valveThis diagnostic code is associated with the VPAT blade angle right solenoid. The FMI 05 means the ECM has determined that the current of the solenoid circuit is below normal.The possible causes of this diagnostic code are listed below:
The energize 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.Note: The following 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 1934 FMI 05 is active before performing this procedure.System Response:When the code is active, the angle function the solenoid controls will not operate.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 blade angle right solenoid from the machine harness.
At the machine harness connector for the solenoid, place a jumper wire from contact 1 (wire F789-YL) to contact 2 (wire H802-GY).
Observe the status of the CID 1934 FMI 05 diagnostic code.Expected Result: The active diagnostic code changes from an FMI "05" to an FMI "06" diagnostic code as the jumper wire is installed.Results:
YES - The active diagnostic code changes from an FMI "05" to an FMI "06" diagnostic code when the jumper wire is installed. The solenoid has failed.Repair: Repeat this Test Step "CHECK THE SOLENOID" in order to verify that the solenoid has failed. Replace the solenoid. Verify that the new solenoid corrects the problem. STOP
NO - The CID 1934 FMI 05 diagnostic code remains active. The jumper wire does not affect the status of the diagnostic code. The solenoid is not causing the problem. 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 connectors from the ECM.
The jumper wire that was installed in the previous test step remains in place.
At the machine harness connector, measure the resistance from signal contact J1-59 (wire F789-YL) to J1-60 (wire H802-GY). Expected Result:The resistance is less than 5.0 ohms.Results:
OK - The resistance is less than 5.0 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - The resistance is greater than 5.0 ohms. The resistance measurement is not correct. Repair: A resistance measurement that is much greater than 5 ohms but less than 5000 ohms could indicate that one of the connection points in the circuit is not open but is not a good connection.There is an open circuit or a bad connection in the machine harness. The problem is in the signal wire of the solenoid F789-YL or in the return H802-GY of the machine harness. Refer to the complete system schematic and check all harness