ADAPTER-FAN 1318154 - Caterpillar

Illustration 1 g00935574
Test Step 1. Check for Connector Damage.
Turn the keyswitch to the OFF position.
Thoroughly inspect the ECM connector J1/P1 and the machine connector J2/P2. Inspect all of the other connectors. Refer to the diagnostic functional test 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 2.25 0.25 N m (20 2 lb in).
Check the machine 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 the following problems: damage, corrosion, abrasion and incorrect attachmentResults:
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. Stop.Test Step 2. Check for a Solenoid Internal Short or Open.
Disconnect the connector for the engine fan control solenoid J48/P48.
Measure the resistance of the solenoid between J48-1 and J48-2.Expected Result:The resistance is between 2.8 0.3 Ohms.Results:
OK - The resistance is between 2.8 0.3 Ohms. Proceed to Test Step 3.
Not OK - The resistance is not between 2.8 0.3 Ohms. The solenoid is internally shorted or open.Repair: Replace the solenoid. Stop.Test Step 3. Check the Voltage at the Solenoid.
Connect Cat ET to the cab service tool connector J31. Start Cat ET.
Turn the Battery disconnect switch to the ON position.
Turn the keyswitch to the ON position. The engine should be off.
Select the override for the engine fan on Cat ET.
Set the override for the engine fan to 100 percent.
Measure the voltage between P48-1 and P48-2 at the engine fan control solenoid.Expected Result:The voltage is