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MODIFICATION 3156562 - Caterpillar

3156562 MODIFICATION Caterpillar parts MODIFICATION
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Caterpillar 3156562 MODIFICATION

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Illustration 1 g02472517
Schematic for the cooling fan control for the engine
Illustration 2 g02472536
Pin locations on the P1 connector (P1-43) Cooling fan control (P1-51) Cooling fan returnTest Step 1. Inspect Electrical Connectors and Wiring
Remove the electrical power from the ECM.
Thoroughly inspect the ECM connector J1/P1. Inspect all of the other connectors for the circuit. Refer to service Troubleshooting, "Electrical Connectors - Inspect".
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. Refer to service Troubleshooting, "Electrical Connectors - Inspect".
Check the harness and the wiring for abrasion and for pinch points.Expected Result:All connectors, pins, and sockets are correctly coupled and/or inserted. 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 correctly coupled.Perform the "Wiggle Test" on

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