BODY-OIL PUMP 3T9906 - Caterpillar

Illustration 1 g00745818
Test Step 1. Check the Electrical Connectors and the Wiring.
Turn the Battery switch for the ECM to the OFF position.
Turn the breaker at the battery to the OFF position.
Thoroughly inspect the ECM connector J1/P1. Inspect all of the other connectors. Refer to 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 6.0 N m (55 lb in).
Check the customer 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 pinch points.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring should be free of corrosion, abrasion or pinch points.Results:
OK - The wiring and connectors are okay. Proceed to Test Step 2.
Not OK - Repair the wiring and connectors or replace the wiring or the connectors. Ensure that all of the seals are properly connected. Verify that the repair eliminates the problem.STOPTest Step 2. Check the Engine Prelube Pressure Switch.
Disconnect the wires from terminals 1 and 2 of the engine prelube pressure switch.
Measure the resistance between terminals 1 and 2 of the engine prelube pressure switch .
Replace all wires.Expected Result:The resistance should be greater than 20,000 Ohms.Results:
OK - The resistance is greater than 20,000 Ohms. The engine prelube pressure switch is not active. Proceed to test step 3.
Not OK - The resistance is less than 20,000 Ohms. The engine prelube pressure switch is active. Verify that the engine does not have a residual oil pressure that is high enough to activate the switch. If there is no residual oil pressure the switch is not operating correctly.Repair: Replace the engine prelube pressure switch. Verify that the problem has been solved.STOPTest Step 3. Check the Voltage to the Prelube Relay.
Turn the breaker at the battery to the ON position.
Turn the Battery switch for the ECM to the ON position.
Connect a voltage test lamp between terminal 3 of the prelube relay and the engine ground.
Turn the Start/Run/Stop switch to the RUN position.
Monitor the voltage test lamp for illumination.
Turn the Start/Run/Stop switch to the STOP position.Expected Result:The voltage test lamp should illuminate.Results:
OK - The voltage test lamp illuminated. Proceed to test step 4.
Not OK - The voltage test lamp did not illuminate. Proceed to test step 7.Test Step 4. Check the Voltage to the Prelube Motor.
Connect a voltage test lamp between terminal 1 of the prelube relay and the engine ground.
Turn the Start/Run/Stop switch to the RUN position.
Monitor the voltage test lamp for illumination.
Turn the Start/Run/Stop switch to the STOP position.Expected Result:The voltage test lamp should illuminate.Results:
OK - The voltage test lamp illuminated.Repair: Check the voltage at the prelube