SEAL-LIP TYPE 4806340 - Caterpillar

Illustration 1 g01776955
Schematic of the limit switch (inching pedal)This diagnostic code is associated with the limit switch (inching pedal). The limit switch (inching pedal) 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. Clear the diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 1484 FMI 03 is active before performing this procedure.System Response:If the position sensor (inching pedal) is operating correctly, no changes in operation will be noticed.Test Step 1. CHECK THE GROUND CIRCUIT OF THE SWITCH IN THE HARNESS.
Turn the key start switch to the OFF position.
Turn the disconnect switch to the OFF position.
Disconnect the machine harness connectors from the ECM.
Measure the resistance between contact J1-16 (wire J765-BU) of the machine harness for the ECM and the contact COM (wire J765-BU). Expected Result:The resistance is less than 5 ohms. Results:
OK - The resistance is less than 5 ohms. The circuit is correct. Proceed to Test Step 2.
NOT OK - The resistance is greater than 5000 ohms. The circuit is open. The machine harness has failed.Repair: Repair the machine harness or replace the