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| Illustration 1 | g01269268 |
Connections of the blade sideshift right solenoid | |
This diagnostic code is associated with the blade sideshift right solenoid. The FMI 03 means that the Implement ECM has determined that the voltage of the solenoid circuit is above normal.
The Implement ECM provides a PWM signal to the solenoid in order to provide proportional control of the solenoid. The ECM will vary the electrical current of the PWM signal, based on the input command that is received from the position sensor for the blade sideshift. The sensor is located in the assembly of the right joystick.
Conditions that can cause this diagnostic code are listed:
- The energize circuit of the solenoid is shorted to another voltage source.
- 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. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected.
Note: The resistance of the solenoid coil should be 8.7 ± .4 ohms at 25 °C (77.0 °F).
Test Step 1. CHECK THE ENERGIZE CIRCUIT OF THE SOLENOID FOR A SHORT
- Turn the key start switch and the disconnect switch to the OFF position.
- Disconnect the machine harness connector from the solenoid. Disconnect the machine harness connectors J1 and J2 from the ECM.
- At the ECM connector J1 of the machine harness, measure the resistance from contact J1-66 (wire U749-BR) to all J1 and J2 contacts that are used on the ECM connectors.
Expected Result:
Each resistance measurement is greater than 5000 ohms.
Results:
- OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 2.
- NOT OK - Each resistance measurement is not greater than 5000 ohms. There is a short in the machine harness. The short is between wire U749-BR and the circuit that has a low resistance measurement.
Repair: Repair the machine harness or replace the machine harness.
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Test Step 2. CHECK THE OPERATION OF THE ECM
- The disconnect switch and the key start switch remain in the OFF position.
- The machine harness connectors for the solenoid and the ECM remain disconnected.
- At the machine harness connector J1 for the ECM, use a 151-6320 Removal Tool to remove the solenoid wire U749-BR and the socket at contact J1-66 from the harness connector.
- Reconnect the machine harness J1 and J2 connectors to the ECM.
- Turn the disconnect switch and the key start switch to the ON position.
- Observe the status of the active CID 2166 FMI 03 diagnostic code.
Expected Result:
The CID 2166 FMI 03 diagnostic code is no longer active. A CID 2166 FMI 05 diagnostic code is now active.
Results:
- YES - The CID 2166 FMI 03 diagnostic code is no longer active. A CID 2166 FMI 05 diagnostic code has been activated after the energize circuit of the solenoid is disconnected. The ECM has responded correctly to the open circuit condition in the solenoid circuit. Reconnect the disconnected solenoid wire in the ECM connector before proceeding to the next test step. Proceed to Test Step 3.
- NO - The CID 2166 FMI 03 diagnostic code remains active. The status of the active diagnostic code did not change when the solenoid wire was disconnected from the ECM.
Repair: The ECM has not responded correctly to the open condition in the solenoid circuit. The operation of the ECM is not correct.Prior to replacing an ECM, always contact your dealership's Technical Communicator for possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the ECM must be replaced, refer to Testing and Adjusting, "Electronic Control Module (ECM) - Replace".
STOP
Test Step 3. CHECK THE STATUS OF THE DIAGNOSTIC CODE
- Perform the following:
- Visually inspect the harness connectors.
- Clean the contacts of the harness connectors.
- Visually inspect the insulation of the wires for damage that is caused by excessive heat, battery acid, or chafing.
- Visually inspect the harness connectors.
- Perform a 45 N (10 lb) pull test on each of the wires that are associated with the sensor circuit.
- Reconnect all harness connectors. Verify the following:
- The connectors are fully seated.
- The clips for each connector are completely fastened.
- The connectors are fully seated.
- Turn the disconnect switch and the key start switch to the ON position.
- Operate the machine.
- Determine if the CID 2166 FMI 03 diagnostic code is active.
Expected Result:
The CID CID 2166 FMI 03 diagnostic code is active.
Results:
- YES - The CID 2166 FMI 03 diagnostic code is active.
Repair: Check the circuit again. Perform a Wiggle Test on the machine wiring harness with the Caterpillar Electronic Technician (Cat ET) service tool. TheWiggle Test can detect the following in the machine wiring harness:
- Momentary shorts
- Intermittent shorts
- Opens
- The ECM detected the open circuit condition in the solenoid circuit.
- The ECM activated the FMI 05 diagnostic code when the wire that energizes the solenoid was disconnected.
STOP
- Momentary shorts
- NO - The CID 2166 FMI 03 code is not active. The problem does not exist at this time.
Repair: The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation.
STOP