PLATE 9R0587 - Caterpillar

Illustration 1 g02594097
Schematic for the makeup oil level switch
Illustration 2 g02594127
P2 ECM connector (P2-56) 8V supply (P2-20) Analog return
Illustration 3 g02594178
P1 ECM connector (P1-29) Makeup oil level
Illustration 4 g01159881
Sensor connector (A) 8V sensor supply (B) Sensor return (C) SignalTest Step 1. Check the Level of the Oil in the Makeup Oil Tank
Check the oil level in the makeup oil tank.Expected Result:The oil is at the correct level.Results:
OK - The oil level is correct. Proceed to Test Step 2.
Not OK - The oil level is low.Repair: Add oil to the makeup oil tank.STOPTest Step 2. Inspect the Electrical Connectors and the Wiring
Turn the keyswitch to the OFF position.
Thoroughly inspect the ECM connector J1/P1 and the ECM connector J2/P2. Inspect the connector for the makeup tank low oil level switch. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connectors that are associated with the circuit.
Check the ECM connector's (allen head screw) for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
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 3.
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 3. Check the Status of the "Engine Oil Refill Tank Level" on Caterpillar Electronic Technician (ET)
Connect Cat ET to the service tool connector.
Turn the keyswitch to the ON position.
Observe the status of the "Engine Oil Refill Tank Level" on Cat ET.Expected Result:The status of the "Engine Oil Refill Tank Level" reads "OK".Results:
OK - The status of the "Engine Oil Refill Tank Level" reads "OK".Repair: The switch signal is correct. If the problem is intermittent, refer to Troubleshooting, "Electrical Connectors - Inspect" for information on inspecting electrical connections.STOP
Not OK - The status of the "Engine Oil Refill Tank Level" reads "Low". The switch signal to the ECM is not correct. Proceed to Test Step 4.Test Step 4. Check the 8V Supply Voltage at the Connector for the Makeup Tank Low Oil Level Switch
Do not disconnect the connector for the makeup tank low oil level switch.
Connect a multimeter between pin A and pin B on the switch side of the connector for the makeup tank low oil level switch.
Measure the voltage between pin A and pin B of the connector.
Wiggle the harness while you monitor the voltage on the voltmeter. Perform the 45 N (10 lb) pull test on each wire in the circuit. Each terminal and each connector should easily withstand 45 N (10 lb) of tension and each wire should remain in the connector body. This test checks whether the wire was