HOUSING-REGULATOR 3660714 - Caterpillar

MID 087 - Chassis ECMCID 0725 - Hoist Lower SolenoidFMI 06 - Current Above Normal
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Hoist Lower solenoid coil assembly
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Hoist Lower solenoid circuit
This diagnostic code indicates the "Chassis" ECM detects the hoist lower solenoid current is above normal.This diagnostic code can be caused by:
Solenoid energizer circuit shorted to ground
Solenoid failure
ECM failureNote: The following test procedure may create other diagnostic codes. Ignore these created codes and clear these created codes after the original diagnostic code has been corrected. Ensure diagnostic code CID 0725 FMI 06 is active before performing this procedure.Note: Use a calibrated digital multimeter for this procedure.Test Step 1. CHECK THE SOLENOID
Turn on the disconnect switch and the key switch.
Observe the status of the diagnostic code.
Disconnect the solenoid from the harness.Expected Result:CID 0725 FMI 06 changes to CID 0725 FMI 05.Results:
OK - CID 0725 FMI 06 changes to CID 0725 FMI 05. The solenoid has failed.Repair: Replace the solenoid.STOP
NOT OK - CID 0725 FMI 06 does not change to CID 0725 FMI 05. Proceed to Test Step 2.Test Step 2. CHECK FOR A SHORT TO GROUNDThe solenoid remains disconnected from the harness.
Turn off the key switch and the disconnect switch.
Disconnect the harness from the "Chassis" ECM.
At the harness connector for the ECM, measure the resistance from signal contact J1-65 (wire F919-GY(Grey)) to all contacts in the harness connectors for the ECM.Expected Result:Each resistance is greater than 5000 ohms.Results:
OK - Each resistance is greater than 5000 ohms. Proceed to Test Step 3.
NOT OK - A resistance is less than 5000 ohms. There is a short between J1-65 (wire F919-GY(Grey)) and the circuit with low resistance.Repair: Repair or replace the harness.STOPTest Step 3. CHECK THE DIAGNOSTIC CODEThe key switch and the disconnect switch remain in the off position.
Inspect the harness.Clean the harness connector contacts.Inspect the harness connector contacts for corrosion or damage.Inspect the wire insulation for damage caused by heat, corrosion, or chafing.
Perform a 45 N (10 lb) pull test on each circuit wire.
Reconnect all harness connectors.Verify that the connectors are fully seated and the clips are fastened.
Check for intermittent problems. Using Cat® Electronic Technician (Cat® ET), perform a wiggle test on the harness.
Turn on the disconnect switch and the key switch.
Operate the machine.
Check CID 0725 FMI 06 status.Expected Result:CID 0725 FMI 06 is not active.Results:
OK - CID 0725 FMI 06 is not active.Repair: The initial diagnostic code was probably caused by a poor connection at one of the connectors that was checked.Resume normal operation.STOP
NOT OK - CID 0725 FMI 06 is active. The ECM may have failed.Repair: Exit this procedure and perform this procedure again. Contact your technical communicator. If the ECM requires replacement, see Testing and Adjusting, "Electronic Control Module (ECM) - Replace".STOP