CAMSHAFT 3017453 - Caterpillar

This diagnostic code is associated with the Pattern Change Switch. The switch is connected to three inputs of the ECM. Two inputs are "Normally Open" and a third input is "Normally Closed". Depending on the position of the switch operation, the inputs will be either open or grounded.The FMI 02 means that the ECM has determined that two inputs are grounded.Note: The following test procedure may create other diagnostic codes. Ignore these diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 1007 FMI 02 is active before performing this procedure.System Response:If the switch is faulted during operation, the last known value will be saved. If the switch is faulted at power up, the park brake will remain engaged and the implements will be locked out.Test Step 1. CHECK THE OPERATION OF THE SWITCHNote: The switch is in the non-actuated position.
Disconnect the negative battery cable and turn the key start switch to the OFF position.
Disconnect the machine harness connector or the wires from the switch.
Connect one lead from the multimeter to the common contact (2) for the switch.
Connect the other lead from the multimeter to the normally open contact (1) for the switch.
Measure the resistance between contact 2 and contact 1. Note the resistance.
Disconnect the lead from contact 1 and connect the lead to the normally closed contact (3).
Measure the resistance between contact 2 and contact 3. Note the resistance.
Disconnect both leads of the multimeter. Connect one lead to contact 5. Connect the other lead to contact 6.
Measure the resistance between contact 5 and contact 6. Note the resistance.Expected Result:The resistance from contact 2 to contact 3 is less than 5 ohms, and the resistance from contact 2 to contact 1