3843912 PIN AS-POWER Caterpillar parts
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Alternative (cross code) number:
CA3843912
384-3912
3843912
CA3843912
384-3912
3843912
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Information:
Expected Result:
A "CID 0333 FMI 03" is active.Results:
OK - A CID 0333 FMI 03 is active. Proceed to "Test Step 2 - Check for Shorted Data Link Wire".NOT OK - A CID 0333 FMI 03 has not occurred. The diagnostic code is NOT active. STOP.Test Step 2 - Check for Shorted Data Link Wire
Disconnect the cable on the "B-" terminal of the battery or open the optional battery disconnect switch.
Disconnect both ends of the data link wire: GSC+ Pin 35 and Alarm Module Terminal 2.
Measure the resistance from the data link wire to the GSC+ battery positive terminal.Expected Result:
The resistance should be greater than 5000 ohms.Results:
OK - The resistance is correct. Proceed to "Test Step 3 - Check the Alarm Module".NOT OK - The resistance is NOT greater than 5000 ohms. The data link wire is faulty.
Repair: See the system schematic in order to troubleshoot and repair the harness wiring that has failed between the ALM and the GSC+. Refer to Testing and Adjusting, "Schematics and Wiring Diagrams". STOP.Test Step 3 - Check the Alarm Module
The cable on the "B-" terminal remains disconnected or the optional battery disconnect switch is open.
Measure the resistance from Alarm Module Terminal 2 to "B+".Expected Result:
The resistance should be greater than 5000 ohms.Results:
OK - The resistance is greater than 5000 ohms. Proceed to "Test Step 4 - Check the GSC+".NOT OK - The resistance is NOT greater than 5000 ohms. The Alarm Module has failed.
Repair: Replace the Alarm module. STOP.Test Step 4 - Check the GSC+
Ensure that the data link wire remains disconnected.
Connect the cable on the "B-" terminal of the battery or close the optional battery disconnect switch.
Turn the ECS switch to the "STOP" position.
Check for an active CID 333 FMI 03 diagnostic code on the GSC+.Expected Result:
The diagnostic code is no longer active.Results:
YES - The diagnostic code is not active. The diagnostic code 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. Check the wiring for problems and resume normal operation. Watch for a recurrence of the problem. STOP.NO - The diagnostic code has not been corrected. The GSC+ may have failed.
Repair: Exit this procedure and perform this procedure again. Also, recheck if the diagnostic code is active. If the cause of the diagnostic code is not found, replace the GSC+. Refer to Testing and Adjusting, "EMCP Electronic Control (Generator Set) - Replace" STOP.GSC CID 0333 - FMI 04
A possible cause of a CID 0333 FMI 04 diagnostic code is a short to "B-". The GSC+ treats a CID 0333 FMI 04 as an alarm fault. Clear the diagnostic code from the fault log after troubleshooting is complete.Note: If a CID 0333 FMI 04 is active on the upper display and no alarm module is installed, check the terminal strips on the subpanel for a short. Perform the check from the signal wire to "B-". Also, check the
A "CID 0333 FMI 03" is active.Results:
OK - A CID 0333 FMI 03 is active. Proceed to "Test Step 2 - Check for Shorted Data Link Wire".NOT OK - A CID 0333 FMI 03 has not occurred. The diagnostic code is NOT active. STOP.Test Step 2 - Check for Shorted Data Link Wire
Disconnect the cable on the "B-" terminal of the battery or open the optional battery disconnect switch.
Disconnect both ends of the data link wire: GSC+ Pin 35 and Alarm Module Terminal 2.
Measure the resistance from the data link wire to the GSC+ battery positive terminal.Expected Result:
The resistance should be greater than 5000 ohms.Results:
OK - The resistance is correct. Proceed to "Test Step 3 - Check the Alarm Module".NOT OK - The resistance is NOT greater than 5000 ohms. The data link wire is faulty.
Repair: See the system schematic in order to troubleshoot and repair the harness wiring that has failed between the ALM and the GSC+. Refer to Testing and Adjusting, "Schematics and Wiring Diagrams". STOP.Test Step 3 - Check the Alarm Module
The cable on the "B-" terminal remains disconnected or the optional battery disconnect switch is open.
Measure the resistance from Alarm Module Terminal 2 to "B+".Expected Result:
The resistance should be greater than 5000 ohms.Results:
OK - The resistance is greater than 5000 ohms. Proceed to "Test Step 4 - Check the GSC+".NOT OK - The resistance is NOT greater than 5000 ohms. The Alarm Module has failed.
Repair: Replace the Alarm module. STOP.Test Step 4 - Check the GSC+
Ensure that the data link wire remains disconnected.
Connect the cable on the "B-" terminal of the battery or close the optional battery disconnect switch.
Turn the ECS switch to the "STOP" position.
Check for an active CID 333 FMI 03 diagnostic code on the GSC+.Expected Result:
The diagnostic code is no longer active.Results:
YES - The diagnostic code is not active. The diagnostic code 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. Check the wiring for problems and resume normal operation. Watch for a recurrence of the problem. STOP.NO - The diagnostic code has not been corrected. The GSC+ may have failed.
Repair: Exit this procedure and perform this procedure again. Also, recheck if the diagnostic code is active. If the cause of the diagnostic code is not found, replace the GSC+. Refer to Testing and Adjusting, "EMCP Electronic Control (Generator Set) - Replace" STOP.GSC CID 0333 - FMI 04
A possible cause of a CID 0333 FMI 04 diagnostic code is a short to "B-". The GSC+ treats a CID 0333 FMI 04 as an alarm fault. Clear the diagnostic code from the fault log after troubleshooting is complete.Note: If a CID 0333 FMI 04 is active on the upper display and no alarm module is installed, check the terminal strips on the subpanel for a short. Perform the check from the signal wire to "B-". Also, check the