DISC-FLY CL BK 6Y7178 - Caterpillar

Illustration 3 g01214661
P1 ECM connector (P1-43) Engine fan control solenoid (P1-51) Solenoid return
Illustration 4 g01155187
Connector for the fan control solenoid (1) Signal (2) Return
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 allen head screw on 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. The harness and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The harness and wiring appear to be OK. Proceed