CONVERSION GP 1894638 - Caterpillar

Illustration 1 g01735735
Schematic of the circuit connections for the "Final Drive Oil Bypass" solenoid
The ECM expects to see the energize current at the contact when the solenoid is energized and no current when the solenoid should not be energized. The FMI 06 means that the ECM has determined that the current for the solenoid circuit is above the level that is expected.Some possible causes of this diagnostic code are listed below:
The feedback circuit of the solenoid is shorted to ground.
The solenoid has failed.
The ECM has failed. This is unlikely. 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 has been corrected. Ensure that the diagnostic code of CID 1232 FMI 06 is active before performing this procedure.Test Step 1. CHECK THE SOLENOID
Turn the disconnect switch and the key start switch to the ON position. 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 CID 1232 FMI 06 diagnostic code changes to a CID 1232 FMI 05 diagnostic code when the solenoid is disconnected.Results:
YES - The CID 1232 FMI 06 diagnostic code changes to a CID 1232 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
NO - The CID 1232 FMI 06 diagnostic code remains active. Proceed to Test Step 2.Test Step 2. CHECK THE FEEDBACK CIRCUIT OF THE SOLENOID FOR A SHORT TO GROUND
Turn the key start switch and the disconnect switch to the OFF position.
The solenoid remains disconnected from the machine harness.
Disconnect the machine harness connectors J1 and J2 from the Brake ECM.
At the machine harness connectors of the Brake ECM, measure the resistance from the contact J1-12 (wire J845-PU(Purple)) to frame ground or to a ground contact on connectors J1 or J2. Expected Result:The resistance measurement is greater than 5000 ohms.Results:
OK - The resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - The resistance measurement is not greater than 5000 ohms. There is a short in the machine harness. The short is between J1-12 (wire J845-PU(Purple)) and one of the grounded wires in the machine harness. Repair: Repair the machine harness or replace the machine harness. STOPTest Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS
Inspect the contacts of the harness connectors that are used in the solenoid circuit. Ensure that the contacts are secure. Clean all of the contacts in the harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Operate the machine.
Check the status of the CID 1232 FMI 06 diagnostic code. Expected Result:The CID 1232 FMI 06 diagnostic code is still active. Results:
YES - The CID 1232 FMI 06 diagnostic code is still active. The diagnostic code has not been corrected. The