EDGE-SEGMENT 4T6692 - Caterpillar

System Operation Description:Switch circuits may have problems such as faulty wiring, faulty switches, or faulty connectors. Use the following diagnostic procedures in order to diagnose problems with these switch circuits and repair these switch circuits:
Engine ECM reset switch
Start aid manual override switch
Start/Run/Stop switchNote: The engine ECM reset switch is installed by the customer.These switches are normally open or normally closed.
Illustration 1 g01366881
Typical switch inputs and wiringTest Step 1. Check the Electrical Connectors and the Wiring
Remove the electrical power from the Electronic Control Module (ECM).
Illustration 2 g02164341
Location of the connectors that are for the switch circuits (typical left side engine view) (1) J1/P1 ECM connectors
Thoroughly inspect connectors (1) and the engine interface connectors. Thoroughly inspect the connections for the suspect switch. Refer to Troubleshooting, "Electrical Connectors - Inspect".
Illustration 3 g02219135
Terminal locations at the J1/P1 ECM connectors that are for the switch circuits (P1-22) Start aid manual override switch (P1-40) Start/Run/Stop switch (P1-41) Engine ECM reset switch
Illustration 4 g02219137
Terminals at the engine interface connector that are for the switch circuits (Terminal 9) Start aid manual override switch (Terminal 16) Start/Run/Stop switch
Perform a 45 N (10 lb) pull test on each of the wires in the circuit for the suspect switch.
Check the allen head screw on each ECM connector for the proper torque. Also, check the allen head screw on the customer connector for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and wiring for abrasions and for pinch points from the battery to the ECM.Expected Result:All connectors, pins, and sockets are coupled and/or inserted, and the harness and wiring are free of corrosion, of abrasion and of pinch points.Results:
OK - The wiring and connectors appear to be OK. Proceed to Test Step 2.
Not OK - There is a problem with the wiring and/or a connector.Repair: Repair the wiring and/or the connector. Replace parts, if necessary.