Checking the Oil Pump

Checking the oil pump

Checking the function of the pump motor




- Start the engine.
Check if the pump motor in the unit for four wheel drive (Active on Demand Coupling) starts and runs normally.

Hint: The motor must hum and vibrate slightly. Listen using a stethoscope or a screwdriver pressed to your ear





Is the oil pump motor working?

Yes - No Fault Found

No - Checking the power supply

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Checking the power supply








- Ignition off
- Disconnect the connector for the pump motor
- Start the engine.
Check the voltage for the pump motor by taking readings between terminals #1 and #2 on the pump motor connector (control module side). The voltage must be Ubat.
If the voltage is not OK, check the wiring between the control module for four wheel drive (Active on Demand Coupling) and the pump motor. Check for an open-circuit. Check for a short-circuit to each other.
Replace the oil pump motor if the voltage is OK.
Remedy as necessary.

Other information
- To replace the oil pump motor, see Oil pump active on demand coupling (AOC), replacing
- For information about signals, see Signal specification, control module for four wheel drive Pinout Values and Diagnostic Parameters
- Checking wiring and terminals Checking Wiring And Terminals.














Continue - Verification

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Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Start the engine.
Check if the pump motor in the unit for four wheel drive (Active on Demand Coupling) starts and runs normally.

Hint: Feel the pump motor using your fingers. The motor must hum and vibrate slightly.

Is the pump motor functioning?

Yes - Fault Found

No - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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Attempt New Test - Checking the function of the pump motor

FAULT-TRACING FAILED - FAULT-TRACING FAILED

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