Electronic Modular Control Panel II (EMCP II) Caterpillar

The fault indicators of the control panel alarm module that are controlled by the data link will flash at a rate of 0.5 Hz (every two seconds).

Illustration 1	g00850754
Alarm Module

There are several possible causes when the indicators of the alarm module are flashing. Before performing the test procedure, review the following requirement for the alarm module.

• Check The GSC For Diagnostic Codes. If a CID 333 FMI 03 or CID 333 FMI 04 diagnostic code is active or if the codes are contained in the fault log, perform those procedures first.

Test Step 1. CHECK THE DATA CIRCUIT WIRE FOR AN OPEN

1. Clear the GSC Fault Log. See Systems Operation, "Fault Log Clearing OP4".

2. Turn the engine control switch (ECS) to OFF/RESET.

3. Temporarily connect terminal 1 to terminal 2 of the alarm module for a few seconds.

4. Temporarily connect terminal 7 to terminal 2 of the alarm module for a few seconds.

Expected Result:

The CID 333 FMI 03 and CID 333 FMI 04 diagnostic codes should be temporarily active while the faults are occurring. The CID 333 FMI 03 and CID 333 FMI 04 diagnostic codes should be contained in the GSC fault log.

Results:

• OK - The diagnostic codes occur and the codes are contained in the GSC fault log. The GSC and the wire for the alarm (data) have not failed. Proceed to Test Step 2.

• NOT OK - The diagnostic codes do NOT occur and the codes are not in the GSC fault log. The wire from contact 35 of the GSC to terminal 2 of the alarm module is open or the wire has failed. Also, the GSC may have failed. Proceed to Test Step 3.

Test Step 2. CHECK THE ALARM MODULE FOR FAULTS.

1. The indicators on the alarm module remain flashing.

2. Disconnect the wire on terminal 2 of the alarm module.

3. Measure the DC voltage from terminal 2 to terminal 7 of the alarm module.

Expected Result:

The voltage should be 10.5 ± 1.0 DCV.

Results:

• OK - The voltage is 10.5 ± 1.0 DCV. The requirement for the alarm module that was listed at the beginning of this procedure may not be met.

  Repair: Review the requirement at the beginning of this procedure. If the requirement is being met, replace the alarm module. If the problem is not solved, replace the GSC. See Testing and Adjusting, "EMCP Electronic Control (Generator Set) - Replace".

  Stop.

• NOT OK - The voltage is NOT 10.5 ± 1.0 DCV. The alarm module has failed.

  Repair: Replace the alarm module.

  Stop.

Test Step 3. CHECK THE GSC FOR DIAGNOSTIC CODES.

1. Install a cable probe on pin 35 of the GSC 40-pin connector. Ensure that the cable probe is fully seated.

2. Turn the ECS to the STOP position.

3. Temporarily connect pin 35 of the GSC to +battery for a few seconds.

4. Temporarily connect pin 35 of the GSC to battery negative for a few seconds.

Expected Result:

The CID 333 FMI 03 and CID 333 FMI 04 diagnostic codes will temporarily be active on the GSC display while the diagnostic codes are occurring.

Results:

• OK - The diagnostic codes occur. The GSC has not failed. The wire from GSC contact 35 to terminal 2 of the alarm module is open or the wire has failed.

  Repair: Repair the wire or replace the wire.

  Stop.

• NOT OK - The diagnostic codes do not occur. The GSC may have failed.

  Repair: The GSC may have failed. It is unlikely that the GSC has failed. Exit this procedure and perform this entire procedure again. During the procedure, ensure that all cable probes are fully seated and ensure that the probes are making contact with the GSC pins. If the result is repeated, replace the GSC. See Testing and Adjusting, "EMCP Electronic Control (Generator Set) - Replace".

  Stop.