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LINES GP- 3157330 - Caterpillar



3157330 LINES GP- Caterpillar parts LINES
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Alternative (cross code) number:
CA3157330
315-7330
3157330
Caterpillar 3157330 LINES GP-

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Illustration 1 g02594827
Schematic of the Steering/Transmission Lock Switch
This diagnostic code is associated with the Steering/Transmission Lock Switch. The switch is connected to two inputs of the ECM. The inputs are "Normally Open" and "Normally Closed". One of the inputs is open and the other input is grounded during proper operation. Refer to table 1.
Table 1
Status of Steering and Transmission Lock Switch
Steering and Transmission Lock Switch (N/O)
J1-34 (N/C)
J1-33
Locked Closed Open
Unlocked Open Closed The FMI 04 means that the ECM has determined that the "Normally Open" and "Normally Closed" circuits 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 0626 FMI 04 is active before performing this procedure.System Response:Transmission Lockout is disabled.Test Step 1. CHECK THE SWITCH
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness from the switch.
Turn the key start switch and the disconnect switch to the ON position. Expected Result:The CID 0626 FMI 04 has been replaced by CID 0626 FMI 03.Results:
OK - The CID 0626 FMI 04 has been replaced by CID 0626 FMI 03. The machine harness and the ECM are correct. Proceed to Test Step 3.
NOT OK - The CID 0626 FMI 04 is still active. Proceed to Test Step 2.Test Step 2. CHECK THE HARNESS
Turn the disconnect switch and the key start switch to the OFF position.
The machine harness remains disconnected from the switch.
Disconnect the machine harness connectors from the ECM.
Measure the resistance between contacts J1-34 (wire G748-PU(Purple)) and J1-33 (wire G749-YL(Yellow)) of the machine harness to all the contacts that are used in machine harness connectors for the ECM. Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
YES - Each resistance measurement is greater than 5000 ohms. The ECM has failed.Repair: Failure of the ECM is unlikely. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, contact your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. Refer to the Testing and Adjusting, "Electronic Control Module (ECM) - Replace" Section of this manual for additional details.STOP
NO - One or more of the resistance measurements are less than 5 ohms. The harness has failed. The short is between J1-34 (wire G748-PU(Purple)) and the circuit with the lowest resistance or the short is between J1-33 (wire G749-YL(Yellow)) and the circuit with the lowest resistance. Repair: Repair the wiring harness or replace the wiring harness.STOPTest Step 3. CHECK THE OPERATION OF THE SWITCH
The machine harness remains disconnected from the switch.
Connect one lead from a multimeter to contact2 (wire 202-BK(Black)) of the harness connector for the switch.
Connect the other lead from a multimeter to contact 1 (wire G748-PU(Purple)) of the harness connector for the switch.
Measure the resistance between contact 2 (wire 202-BK(Black)) and contact 1 (wire G748-PU(Purple)). Note the resistance.
Disconnect the lead from contact 1 (wire G748-PU(Purple)) and connect the lead to


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