AP-1000D, AP-1055D, AP-655C, BG-2255C, BG-2455D and BG-260D Asphalt Pavers MID 039 - CID 0974 - FMI 02 Caterpillar

Conditions Which Generate This Code:

Illustration 1	g00931074

This diagnostic code is associated with the left feeder mode switch on the screed. The FMI 02 means that the ECM determined that the signal is intermittent, erratic, or incorrect. The ECM could be receiving invalid combinations from the circuit.

System Response:

When this diagnostic code is active, the following occurs:

• The system for the left feeder will default to the automatic mode.

• The fault lamp for the material system, the tamp system, and the auxiliary system is activated.

• The action lamp is ON.

Test Step 1. CHECK THE CONTINUITY OF THE SWITCH IN THE OFF POSITION

1. Turn the key start switch to the OFF position.

2. Remove the switch from the dash.

3. Unplug the switch from the wire harness.

4. With the switch in the OFF position, check the resistance from terminal 2 to the following terminals: terminal 1 and terminal 3.

Expected Result:

The resistances should be greater than 5000 ohms.

Results:

• OK - The resistances are greater than 5000 ohms. Proceed to Test Step 2.

• NOT OK - The resistance is less than 5000 ohms on one of the readings.

  Repair: The switch has failed. Replace the switch.

  Stop.

Test Step 2. CHECK THE CONTINUITY OF THE SWITCH IN THE AUTO POSITION

1. Press and hold the switch in the AUTO position.

2. With the switch in the AUTO position, check the resistance from terminal 2 to terminal 1 and to terminal 3.

Expected Result:

The resistances should be less than 5 ohms on terminals 1 and 2. The resistances should be greater than 5000 ohms on terminals 2 and 3.

Results:

• OK - The resistances are correct. Proceed to Test Step 3.

• NOT OK - The resistances are not less than 5 ohms on either terminal 1 or terminal 2 or the resistances are not greater than 5000 ohms on either terminal 3 or terminal 2.

  Repair: The switch has failed. Replace the switch.

  Stop.

Test Step 3. CHECK THE CONTINUITY OF THE SWITCH IN THE MANUAL POSITION

1. Place the switch in the MANUAL position.

2. With the switch in the MANUAL position, check the resistance from terminal 2 to terminal 1 and to terminal 3.

Expected Result:

The resistances should be less than 5 ohms on terminals 3 and 2. The resistances should be greater than 5000 ohms on terminals 1 and 2.

Results:

• OK - The resistances are correct. Proceed to Test Step 4.

• NOT OK - The resistances are not less than 5 ohms on either terminal 3 or terminal 2 or the resistances are not greater than 5000 ohms on terminals 2 or terminal 1.

  Repair: The switch has failed. Replace the switch.

  Stop.

Test Step 4. CHECK THE HARNESS

1. The disconnect switch and the key start switch remain in the OFF position.

2. The machine harness remains disconnected from the switch.

3. Disconnect the machine harness connectors from the ECM.

4. Measure the resistance between contacts J1-45 (wire A911-BU) and J1-46 (wire A910-PU) of the machine harness to all the contacts that are used in machine harness connectors for the ECM.

Expected Result:

Each resistance measurement is greater than 5000 ohms.

Results:

• YES - Each resistance measurement is greater than 5000 ohms. The ECM has failed.

  Repair: It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, replace the ECM. See Troubleshooting, "Electronic Control Module (ECM) - Replace".

  Stop.

• NO - One or more of the resistance measurements are less than 5000 ohms. The harness has failed. The short is between J1-45 (wire A911-BU) and the circuit with the lowest resistance or the short is between J1-46 (wire A910-PU) and the circuit with the lowest resistance.

  Repair: Repair the wiring harness or replace the wiring harness.

  Stop.