FILM GP-CAB 1400108 - Caterpillar

Test Step 1. Inspect Electrical Connectors and Wiring
Verify that there are no tripped circuit breakers.
Turn the breaker at the battery to the OFF position.
Turn the engine control switch (ECS) to the OFF/RESET position.
Thoroughly inspect the ECM connectors J1/P1 and J2/P2. Inspect all of the other connectors. Refer to Troubleshooting, "Inspecting Electrical Connectors" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
Check the customer connector (allen head screw) for the proper torque of 2.25 0.25 N m (20 2 lb in).
Check the harness and the wiring for abrasion and for pinch points.Expected Result:The connectors and wiring are free of damage, of abrasion, and of pinch points. The wiring harness and wiring connectors are completely inserted and the wiring harness and wiring connectors are free of corrosion.Results:
OK - The connectors and wiring are okay. Proceed to test step 2.
Not OK - The connectors and/or wiring are not okay.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Verify that the repair has eliminated the problem. Stop.Test Step 2. Check the Switch status on Cat ET.
Connect the Caterpillar Electronic Technician (ET) to the service tool connector.
Turn the breaker at the battery to the ON position.
Select the status screen on Cat ET.
Toggle the overspeed verify switch to the OFF position. Toggle the overspeed verify switch to the ON position. Toggle the overspeed verify switch to the OFF position.Expected Result:The status of the overspeed verify switch changes in accordance with the switch position.Results:
OK - The status of the overspeed verify switch changed in accordance with the switch position.Repair: The overspeed verify switch and related circuitry is operating correctly. Stop.
Not OK - The status of the overspeed verify switch did not change in accordance with the switch position. Proceed to test step 3.Test Step 3. Check the condition of the Overspeed Verify Switch.Note: Record switch wiring before removing wire for correct reconnection.
Turn the ECS to the OFF/RESET position.
Remove the wires from the terminals on the overspeed verify switch.
Connect the terminals for the overspeed verify switch by using a jumper wire with socket terminals at each end.
Turn the ECS to the STOP position.
Observe the status screen on Cat ET.
Turn the ECS to the OFF/RESET position.
Disconnect the shorted terminals that were created for the overspeed verify switch.
Turn the ECS to the STOP position.
Observe the status screen on Cat ET.
Reconnect all wires.Expected Result:The status of the overspeed verify switch reads "ON" when the switch inputs are shorted.The status of the overspeed verify switch reads "OFF" when the switch inputs are not shorted.Results:
OK - The wiring harness and the ECM are working properly. The overspeed verify switch is not operating correctly.Repair: Replace the overspeed verify switch. Verify that the repair has eliminated the problem. Stop.
Not OK - There is a problem in the wiring harness and/or the ECM. Proceed to Test Step