BELT-SERPENTINE 3450409 - Caterpillar

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Terminal locations at the P1 ECM connector for the ground level shutdown switch (P1-23) Ground level shutdown (NC) (P1-40) Ground level shutdown (NO)
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Terminal locations at the machine connector (25-pin) for the ground level shutdown switch (Terminal 8) Ground level shutdown (NO) (Terminal 10) Ground level shutdown (NC)
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Terminal locations at the connector for the ground level shutdown switch (Terminal 1) Ground level shutdown (NO) (Terminal 2) Chassis ground (Terminal 3) Ground level shutdown (NC)
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the ground level shutdown switch. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the allen head screw for each of the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and the wiring for abrasion and for pinch points.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring are free of corrosion, of abrasion and of pinch points.Results:
OK - The connectors and the wiring appear to be OK. Proceed to Test Step 2.
Not OK - There is a problem in the connectors and/or wiring.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled. Verify that the repair eliminates the problem.STOPTest Step 2. Use Cat ET to Check the Status of the Shutdown Switch
Connect Cat ET to the service tool connector.
Turn the keyswitch to the ON position. Start Cat ET.
While you operate the switch, observe the status of the "Shutdown Switch" on Cat ET.Note: Wait at least 30 seconds in order for the status of the switch to change on Cat ET.Expected Result:The correct status of the "Shutdown Switch" is "Shutdown On" when the switch is in the SHUTDOWN position. The correct status is "Shutdown Off" when the switch is in the RUN position.Results:
OK - Cat ET reports "Shutdown On" when the switch is in the SHUTDOWN position. Cat ET reports "Shutdown Off" when the switch is in the RUN position.Repair: The ground level shutdown switch is operating correctly. There may be an intermittent problem in the harness or in a connector. If an intermittent problem is suspected, refer to Troubleshooting, "Electrical Connectors - Inspect" for information that is related to troubleshooting the problem.STOP
Not OK - Either of the following results occur: Cat ET does not report "Shutdown On" when the switch is in the SHUTDOWN position. Cat ET does not report "Shutdown Off" when the switch is in the RUN position. The ground level shutdown switch is not operating correctly. Proceed to Test Step 3.Test Step 3. Install a Jumper Wire at the Connector for the Ground Level Shutdown Switch
Turn the keyswitch to the OFF position.
Disconnect the connector for the ground level shutdown switch.
Fabricate a jumper wire that is long enough to create a short circuit between two terminals at the connector for the ground level shutdown switch.