LAMP GP-HEAD 9X7164 - Caterpillar

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User defined shutdown switch in the OFF position ("Active-Low" configuration)
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User defined shutdown switch in the ON position ("Active-High" configuration)Test Step 1. Inspect Electrical Connectors and Wiring
Turn the Engine Control Switch (ECS) to the OFF/RESET position.
Thoroughly inspect the J2/P2 ECM connector, the J3/P3 Machine interface connector, and the connection to the user defined shutdown device (switch). Refer to 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 abrasions, and of pinch points.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Repair the circuit.Verify that the repair eliminates the problem. Stop.Test Step 2. Verify the Operation of the User Defined Shutdown Switch
Connect the Caterpillar Electronic Technician (ET) to the service tool connector.
Turn the circuit breaker for the battery to the ON position.
Turn the ECS to the STOP position.
Observe the status of "User Defined Switch Active State" on Cat ET.
Observe the configuration of the shutdown switch on Cat ET. Verify that the "User Defined Switch Installation Status" is programmed to "Installed".
Observe the "Configuration" screen of Cat ET. Verify that the "User Defined Switch Active State" is programmed to "Active-Low" or that the status is programmed to "Active-High".
Select the "Caterpillar Monitoring System" and program the "User Defined Switch Active State Warning" to the ON position. Set the time delay to one second. Program the "User Defined Active State Shutdown" to the OFF position.
Access the status screen on Cat ET and monitor the "User Defined Shutdown Switch". Start the engine. Run the engine above the low idle speed. Toggle the user defined shutdown switch from the ON to OFF and back to the ON position.Expected Result:E271-1 user defined shutdown warnng is active when the shutdown switch is in the ON position.When the shutdown switch is in the OFF position, E271-1 is not active.The status of the "User Defined Switch Installation Status" is programmed to "Installed". Also, the "User Defined Switch Active State" is programmed to "Active-Low" or the "User Defined Switch Active State" is programmed to "Active-High".Results:
OK - Proceed to Test Step 4.
Not OK - Proceed to Test Step 3.Test Step 3. Check the Harness for Shorts
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P1 ECM connector
Disconnect ECM connector J1/P1.
Measure the resistance between P1:23 (User defined shutdown input) and engine ground. Measure the resistance between P1:23 (User defined shutdown input) and all other pins in P1 ECM connector.
Measure the resistance between P1:29 (Digital return) and engine ground. Measure the resistance between P1:29 (Digital return) and all other pins in P1 ECM connector.Expected Result:The resistance is greater than 20,000 Ohms.Results:
OK - Proceed to Test Step 4.
Not OK - There is a short circuit in the harness or a user defined shutdown device is activating the shutdown feature.Repair: Ensure that a user defined shutdown device is not activating the shutdown feature.Repair the circuit.Verify that the repair eliminates the problem. Stop.Test Step 4. Check