Faulty Signal

Faulty signal

Checking the pressure sensor




Caution! Carry out the test with the car raised so that all four wheels can rotate freely with the mounting protruding on the control arms to prevent damage to the drive shafts.

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

Note! If the car is equipped with TRACS (traction control system) or Traction Control (DSTC (Dynamic stability and traction control), STC (Stability and traction control)) the function must be deactivated. This is carried out by removing the fuse for the brake system pump motor in the engine compartment relay and fusebox. Note that diagnostic trouble codes (DTCs) will be stored in the brake control module (BCM). These must be erased before returning the car to the customer.

- Engine idling
- Read off the oil pressure.
Check that the function of the oil pressure sensor is OK. Run the engine with the car on the lift to increase the clutch oil pressure. Read off the pressure during the test drive. Check that the pressure has been updated.

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

Other information:
- For further information about the fuses and relays, see the Wiring Diagram.





Is the function OK?

Yes - No Fault Found

No - Replacing the control module

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Replacing the control module
Replace the differential electronic module (DEM).

Other information:
- To replace the control module, see Differential electronic module (DEM), replacement Service and Repair.






Continue - Verification

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Verification

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








- Ignition off
- Reconnect the connectors, reinstall components etc.
- Engine idling
- Read off the oil pressure.
Test drive the car on a lift to check that the oil pressure is updated.





Is the function OK?

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 pressure sensor

FAULT-TRACING FAILED - FAULT-TRACING FAILED

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