Fault-Tracing

Fault tracing DEM-P096162

Checking the function




Caution! Carry out the test with the vehicle raised so that all four wheels can rotate freely with the mounting at the ends of the control arms to prevent damage to the drive shafts.

Warning! Ensure that the vehicle is safely raised. Check that no objects are caught in the tire treads.

Note! If the vehicle has TRACS or TC (STC, DSTC) this function must be deactivated. This is done by removing the fuse for the brake system pump motor from the engine compartment electrical centre. Note that this will cause trouble codes to be set in the Brake Control Module (BCM). These codes must be erased before the vehicle is returned to the customer.

- Engine idling.
- Read off the oil pressure.
Check that the function is OK by test running the vehicle on a lift (to increase the clutch oil pressure). Run the car in a low gear or in "Drive" with an automatic transmission. Apply the hand brake slightly and read the pressure value during the test. Check that the pressure is updated. Listen as well for abnormal noises from the clutch.

Hint: The oil pressure sensor has a measurement range of 0 to 4 MPa.

Also check the clutch for leakage.
Remedy as necessary.

Other information:
- For further information about the fuses and relays, see the Wiring Diagram
- Signal specification
- Active on Demand Coupling (AOC), replacing
- Checking wiring and terminals Checking Wiring and Terminals





Continue - Verification

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Verification




Verification

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








Caution! Carry out the test with the vehicle raised so that all four wheels can rotate freely with the mounting at the ends of the control arms to prevent damage to the drive shafts.

Warning! Ensure that the vehicle is safely raised. Check that no objects are caught in the tire treads.

Note! If the vehicle has TRACS or TC (STC, DSTC) this function must be deactivated. This is done by removing the fuse for the brake system pump motor from the engine compartment electrical centre. Note that this will cause trouble codes to be set in the Brake Control Module (BCM). These codes must be erased before the vehicle is returned to the customer.

- Ignition off
- Reinstall the connectors, components etc.
- Engine running, engine speed up to 2000 r.p.m.
- Read off the oil pressure.
Check that the function is OK by test running the vehicle on a lift (to increase the clutch oil pressure). Run the car in a low gear or in "Drive" with an automatic transmission. Apply the hand brake slightly and read the pressure value during the test. Check that the pressure is updated. Listen as well for abnormal noises from the clutch.

Hint: The oil pressure sensor has a measurement range of 0 to 4 MPa.

Also check the clutch for leakage or noise.





Is the function OK?

Yes - Troubleshooting procedure complete

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 - Exit Fault-tracing

No - Attempt New Test

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Attempt New Test - Checking the function

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