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| Illustration 1 | g02720274 |
First gear clutch solenoid connections | |
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| Illustration 2 | g02728891 |
Location of the first gear clutch solenoid (No. 5) | |
This diagnostic code is associated with the first gear clutch solenoid. The FMI 06 means that the electronic control module (ECM) has determined that the current for the solenoid circuit is above normal.
The possible causes of this diagnostic code are listed:
- The energize circuit of the solenoid is shorted to ground.
- The solenoid has failed.
- The ECM has failed. An ECM failure 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 1405 FMI 06 is active before performing this procedure.
System Response:
When this code is active, the implement lockout solenoid is deactivated (LOCKED) unless the limp home mode is selected. All implement functions are disabled.
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 1405 FMI 06 code changes to CID 1405 FMI 05 code when the solenoid is disconnected.
Results:
- YES - The 1405 FMI 06 code changes to CID 1405 FMI 05 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 1405 FMI 06 code remains active. Disconnecting the solenoid did not affect the status of the active diagnostic code. Proceed to Test Step 2.
Test Step 2. CHECK THE ENERGIZE 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 from the ECM.
- At the machine harness connector, measure the resistance from the signal contact "J1-48" (wire 900-PU) to frame ground. Measure the resistance from the signal contact "J1-48" (wire 900-PU) to all of the "J1" and "J2" contacts that are used in the machine harness connectors for the ECM.
Expected Result:
Each resistance measurement is greater than 5000 ohms.
Results:
- OK - Each resistance is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.
- NOT OK - Each resistance measurement is not greater than 5000 ohms. There is a short in the machine harness. The short is between "J1-48" (wire 900-PU) and the circuit with the low resistance measurement.
Repair: Refer to the complete machine Electrical Schematic. Examine all of the connectors in the circuits for points in the machine harness where the circuits could be shorted. For information on testing for short circuits and finding short circuits, refer to Troubleshooting, "Wiring Harness (Short Circuit) - Test" Section of this manual. Repair the machine harness or replace the machine harness.
STOP
Test Step 3. CHECK THE STATUS OF THE DIAGNOSTIC CODE
- Inspect the harness connectors and clean the contacts of the harness connectors.
- Reconnect all harness connectors.
- Turn the disconnect switch and the key start switch to the ON position.
- Clear all inactive diagnostic codes.
- Operate the machine.
- Check the status of CID 1405 FMI 06 diagnostic code.
Expected Result:
The CID 1405 FMI 06 diagnostic code is active.
Results:
- YES - The CID 1405 FMI 06 diagnostic code is active. The problem has not been corrected.
Repair: Check the solenoid circuit again. Use the Caterpillar Electronic Technician (Cat ET) service tool in order to perform a wiggle test on the machine wiring harness. The wiggle test can detect momentary or intermittent shorts or opens in the machine wiring harness.Verify that all possible causes of the diagnostic code have been investigated. Exit this procedure and perform this procedure again.If the cause of the problem is not found, the ECM may have failed. Prior to replacing an ECM, always contact the technical communicator at your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the cause of the diagnostic code is not found and the ECM must be replaced, refer to the Troubleshooting, "Electronic Control Module (ECM) - Replace" Section of this manual for details.
STOP
- NO - The CID 1405 FMI 06 diagnostic code is no longer active.
Repair: The initial diagnostic code may have been caused by a poor electrical connection that was corrected when a harness connector was disconnected and reconnected. Resume normal machine operation.
STOP