SUSPENSION GP-FRONT 2955706 - Caterpillar

Illustration 1 g00676449
Schematic Of The Neutral Start SwitchThis diagnostic code is associated with the limit switch (neutral start). The limit switch (neutral start) is connected to two inputs of the ECM. One contact is open and the other contact is grounded during proper operation. This FMI 06 means that the ECM has determined that the normally open contact and the normally closed contact are grounded.The possible causes of the diagnostic code are listed:
A short to ground
The switch has failed.
The ECM has failed. This is unlikely.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 0490 FMI 06 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.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 J1-16 (wire G939-PK) of the machine harness for the ECM and the contact COM (wire G939-PK) .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