Cat® Command For Hauling Caterpillar

MID 039 - Machine Control Module

CID 3454 - Autonomous Steering Enable Solenoid #1

FMI 03 - Voltage Above Normal

Illustration 1	g03257116

This diagnostic code is active when the Machine Control Module (MCM) has determined the Autonomous Steering Enable Solenoid #1 (Primary EH Steer Pilot SOL [P1]) voltage is above normal. A CID 3456 FMI 03 (Autonomous steering enable solenoid #1 Return - Voltage above normal) could occur with this diagnostic.

Test Step 1. CHECK THE SOLENOID.

1. Turn the keyswitch and battery disconnect switch to the OFF position.

2. Disconnect the solenoid from the machine harness.

3. Measure the resistance between contact 1 and contact 2 of the solenoid.

Expected Result:

The resistance measurement is approximately 30 Ohms at 25° C (77° F).

Results:

• OK - The resistance measurement is approximately 30 Ohms. Proceed to Test Step 2.

• NOT OK - The resistance measurement is more than 5000 Ohms.

  Repair: The coil of the solenoid has failed. Repeat this Test Step to verify that the solenoid has failed. Replace the solenoid.

  STOP

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

1. The keyswitch and the disconnect switch remain in the OFF position.

2. Disconnect the machine harness connector from the solenoid. Disconnect the machine harness connectors J-1 and J-2 from the Input/Output Module (I/O Module).

3. At the machine harness I/O Module connector J1, measure the resistance from contact J1-67 (wire A827-OR(Orange)) to all J-1 and J-2 contacts that are connected to +battery.

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 - Each resistance measurement is not greater than 5000 ohms. There is a short in the machine harness. The short is between J1-67 (A827-OR(Orange)) and the circuit that has a low resistance measurement.

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

  STOP

Test Step 3. CHECK IF THE DIAGNOSTIC CODE IS STILL ACTIVE

1. The keyswitch and the disconnect switch remain in the OFF position.

2. 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.

3. Reconnect all harness connectors.

4. Turn the disconnect switch and the keyswitch to the ON position.

5. Operate the machine.

6. Determine if the CID 3454 FMI 03 is active.

Expected Result:

The CID 3454 FMI 03 is active.

Results:

• YES - The CID 3454 FMI 03 is active.

  Repair: Repeat this procedure. If the problem remains, replace the solenoid. After the solenoid is replaced, repeat this Test Step again. If the diagnostic code is still active, the I/O Module may be faulty. However, I/O Module failure is unlikely. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, replace the ECM. Refer to Testing and Adjusting, KENR8394, "Electronic Control Module (ECM) - Replace".

  STOP

• NO - The CID 3454 FMI 03 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