14L Motor Grader All Wheel Drive Electronic Control System Caterpillar

Illustration 1	g01378224
Schematic of the Right Reverse Clutch solenoid

This diagnostic code is associated with the Right Reverse Clutch solenoid (all wheel drive). The FMI 06 means that the ECM has determined that the current of the Right Reverse Clutch solenoid 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. 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. Verify that all of the connections in the circuit are clean and verify that all of the connections in the circuit are secure. All of the connections must be 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. Ensure that the diagnostic code of CID 2191 FMI 06 is active before performing this procedure.

Note: The resistance of the solenoid coil should be 8.7 ± .4 ohms at 25 °C (77.0 °F).

System Response:

The diagnostic code of CID 2191 FMI 06 will be logged in the internal memory of the All Wheel Drive (AWD) ECM.

The AWD feature will be disabled.

Test Step 1. CHECK THE SOLENOID

1. Turn the disconnect switch and turn the key start switch to the ON position. Do not start the engine.

2. Observe the status of the diagnostic code.

3. Disconnect the solenoid with the active diagnostic code from the machine harness.

Expected Result:

The active CID 2191 FMI 06 diagnostic code changes to a CID 2191 FMI 05 diagnostic code when the solenoid is disconnected.

Results:

• YES - The active CID 2191 FMI 06 diagnostic code changes to a CID 2191 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 2191 FMI 06 remains active when the solenoid is disconnected. The solenoid is not causing the problem. Proceed to Test Step 2.

Test Step 2. CHECK THE ENERGIZE CIRCUIT OF THE SOLENOID FOR A SHORT TO GROUND

1. Turn the key start switch and turn the disconnect switch to the OFF position.

2. The solenoid remains disconnected from the machine harness.

3. Disconnect the machine harness connectors J1 and J2 from the AWD Controller.

4. At the ECM connector J2-6 of the machine harness, measure the resistance to frame ground. Measure the resistance from the contact J2-6 (wire L949-GN) to all of the other J1 and J2 contacts that are used in the AWD 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 3.

• NOT OK - One or more of the resistance measurements is less than 5000 ohms. There is a short in the machine harness. The short is between wire L949-GN and the circuit with the low resistance measurement.

  Repair: Repair the machine harness or replace the machine harness.

  STOP

Test Step 3. CHECK THE STATUS OF THE DIAGNOSTIC CODE

1. Inspect the harness connectors.

   1. Clean the contacts of the harness connectors.

   2. Visually inspect the wires for damage to the insulation that is caused by excessive heat, battery acid, or chafing.

2. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the sensor circuit.

3. Reconnect all harness connectors. Verify the following:
   • The connectors are fully seated.

   • The clips for each connector are completely fastened.

4. Turn the disconnect switch and turn the key start switch to the ON position.

5. Operate the machine.

6. Check the status of the CID 2191 FMI 06 diagnostic code.

Expected Result:

The CID 2191 FMI 06 diagnostic code is still active.

Results:

• YES - The CID 2191 FMI 06diagnostic code is still active. The diagnostic code has not been corrected.

  Repair: Check the circuit again. Use the Caterpillar Electronic Technician (ET) service tool in order to perform a Wiggle Test on the machine wiring harness. The Wiggle Test can detect intermittent shorts and the Wiggle Test can detect intermittent opens in the machine wiring harness.If the problem remains, the ECM may have failed. However, it is unlikely that the ECM has failed. The ECM detected the open circuit condition in the solenoid circuit and the ECM activated the FMI 05 diagnostic code when the solenoid wire was disconnected.Verify that all possible causes of the diagnostic code have been investigated. Exit this procedure and perform this procedure again.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 cause of the diagnostic code is not found and the ECM must be replaced, refer to Testing and Adjusting, "Electronic Control Module (ECM) - Replace".

  STOP

• NO - The CID 2191 FMI 06 is not active. The diagnostic code does not exist at this time.

  Repair: The initial diagnostic code was probably caused by one of the following:

  • A poor electrical connection

  • A short at one of the harness connectors that has been disconnected and reconnected

  Resume normal machine operation.

  STOP