CASE GP-TRANSMISSION 4264361 - Caterpillar

Test Step 1. Inspect the Electrical Connectors and the Wiring
Remove the electrical power from the ECM.
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(1) Location of the J1/P1 ECM connectors
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Location of the cooling fan control solenoid (left front machine view)
Thoroughly inspect ECM connector (1) and the connector for the engine fan control solenoid. Inspect all of the other connectors that are in the circuit. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".
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P1 ECM connector
(P1-43) Fan solenoid
(P1-51) Return
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Connector for the fan control solenoid
(Terminal 1) Signal
(Terminal 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 for each ECM connector for the proper torque. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".
Check the harness and the wiring for abrasion and for pinch points. Expected Result:All connectors, pins, and sockets are 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 coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Check for Active Diagnostic Codes
Connect Cat ET to the service tool connector.
Restore the electrical power to the ECM.
Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Note: Wait at least 30 seconds in order for the diagnostic codes to become active.
Determine if the problem is related to a low current diagnostic code (-5) or a high current diagnostic code (-6). Expected Result:No diagnostic codes are active.Results:
OK - No diagnostic codes are active.Repair: The problem may have been related to a faulty connection in the harness. Carefully reinspect the connectors and wiring. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK - A low current diagnostic code (-5) is active at this time. Proceed to Test Step 4.
Not OK - A high current diagnostic code (-6) is active at this time. Proceed to Test Step 3.Test Step 3. Disconnect the Connector for the Cooling Fan Control Solenoid in Order to Create an Open Circuit
Remove the electrical power from the ECM.
Disconnect the connector for the fan control solenoid.
Restore the electrical power to the ECM. Wait at least 30 seconds for activation of the diagnostic codes.
Access the "Active Diagnostic Code" screen on Cat ET. Check for an active low current diagnostic code (-5) for the engine fan control solenoid.
Remove the electrical power from the ECM. Expected Result:A low current diagnostic code (-5) is now active for the engine fan control solenoid.Results:
OK - A high current diagnostic code (-6) was active before disconnecting the connector. A low current diagnostic code (-5) became active after disconnecting the connector.Repair: Temporarily connect a new fan control solenoid to the harness, but