TUBE 2419367 - Caterpillar

Illustration 1 g00817405
Schematic of the rocker switch (auto retarder)
This diagnostic code is associated with the rocker switch (auto retarder). The switch is connected to two inputs of the ECM. One contact is open and the other contact is grounded during proper operation. This FMI 03 means that the ECM has determined that the normally open contact and the normally closed contact are open.Note: The following test procedure may create other diagnostic codes. Ignore these diagnostic codes and clear the diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0713 FMI 03 is active before performing this procedure.System Response:The diagnostic code will be logged into memory and the auto retarder system (ARC) will be disabled. The ARC will activate when an engine overspeed condition exists.Test Step 1. CHECK THE GROUND CIRCUIT OF THE SWITCH IN THE HARNESS.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector(s) from the ECM.
Measure the resistance between contact J1-15 (wire J766-PU(Purple)) of the machine harness for the ECM and the contact 2 (wire J766-PU(Purple)) . Expected Result:The resistance is less than 5 Ohms. Results:
OK - The resistance is less than 5 Ohms.