CLIP 0918792 - Caterpillar

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SchematicTest Step 1. Inspect Electrical Connectors and Wiring
Remove the electrical power from the ECM.
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Typical left side view (1) J1/P1 ECM connector
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P1 ECM connector (P1-40) Engine start switch NO (P1-41) Engine start switch NC (P1-5) Return
Thoroughly inspect connector 1.
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Operator controls (steering console) (1) Engine start switch (2) Throttle
Thoroughly inspect connector 1 and thoroughly inspect the connector for switch 2. Refer to diagnostic functional tests Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on the wire in the ECM connector that is associated with the active event code.
Check the ECM connector (allen head screw) for the proper torque. Refer to diagnostic functional tests Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the harness and wiring for abrasion and for pinch points from the user defined shutdown device to the ECM.Expected Result:All connectors, pins, and sockets are completely inserted and coupled. The harness and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The harness and wiring are 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. Check the Status of the User Defined Shutdown Input on Caterpillar Electronic Technician (ET)
Verify that the electrical power is removed from the ECM.
Verify that the engine start switch is in the HOLD position.
Connect Cat ET to the service tool connector.
Restore the electrical power to the ECM. Do not start the engine.
Momentarily push up the engine start switch to the START position.
Observe the status of "User Shutdown" on Cat ET.
Momentarily push down the engine start switch to the STOP position.
Observe the status of "User Shutdown" on Cat ET.Note: Perform this test on both operator control panels.Expected Result:The status of