CAP AS-FILLER 3591310 - Caterpillar

Illustration 1 g01452232
Connections of the quickshift switch
This diagnostic code is associated with the quickshift switch. The switch is connected to two inputs of the ECM. One contact is open and the other contact is grounded during proper operation. Refer to table 1. The FMI 03 means that the ECM has determined that the normally open contact and the normally closed contact are open. Before you perform this procedure use table 1 in order to determine the connector and the contacts that correspond to the circuit.The possible causes of this diagnostic code are listed below:
The harness connector is dirty or loose.
The machine harness has failed.
The switch has failed.
The ECM has failed. This is unlikely.Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all of the connections in the circuit are clean and secure. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0628 FMI 03 is active before performing this procedure.Note: Use a digital multimeter for the measurements in this procedure.
Table 1
Status of the Quickshift Switch
Quickshift Switch Wire G758-PU(Purple)
J1-63 G759-WH(White)
J1-64
OFF Closed Open
ON Open Closed 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 J1-70 (wire 202-BK(Black)) of the machine harness for the ECM and contact 2 (wire 202-BK(Black)) at the switch. 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 machine harness.STOPTest Step 2. CHECK THE SWITCH CIRCUITS FOR A SHORT TO THE +BATTERY CIRCUIT
The machine harness connector(s) remains disconnected from the ECM.
The disconnect switch and the key start switch remain in the OFF position.
Disconnect contact 3 (wire G759-WH(White)) and contact 1 (wire G758-PU(Purple)) from the connector of the switch.
At the machine harness connector for the ECM, measure the resistance from contact 3 (wire G759-WH(White)) and contact 1 (wire G758-PU(Purple)) of the machine harness to all the contacts that are used in the machine harness connectors for the ECM. Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The harness is correct. Proceed to Test Step 3.
NO - One or more of the measurements were less than 5 ohms. There is a short in the machine harness. Repair: The short is between wire G759-WH(White) and the circuit with the lowest resistance measurement or