Incorrect Gear Ratio

Incorrect gear ratio

Check the selector lever position sensor adjustment




- Ignition on.
- Read off the position of the selector lever.
Move the selector lever into all positions and check that the lever positions are updated.

Hint: If the display shows an undefined position, e.g. O2, the selector lever position sensor is incorrectly adjusted.

Rectify as necessary

Other information:
- For adjustment of the selector lever position sensor, see Checking and adjusting the gear-shift position sensor Adjustments.









Is the gear-shift position sensor incorrectly adjusted?

Yes - Verifying

No - Checking contact resistance and corrosion

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Checking noise in the transmission
- Test drive the car, see Test Drive Form, description Test Drive Form, Description.
- Check whether the transmission makes any distinctly displeasing or unusual noise or has any functional faults.





Is the transmission making a noise?

Yes - Replacing the transmission

No - FAULT FOUND

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Checking contact resistance and corrosion




- Ignition off.
Check the control module's connector and transmission connectors A and B for contact resistance and corrosion, see Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault

Other information:
- To gain access to the transmission connectors, see Replacement Of Control System Cable Harness With Oil Temperature Sensor.





Continue - Checking noise in the transmission

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Replacing the transmission

Note! In the case of internal faults during the first year on the market, transmission AW55-50SN should be replaced.

Replace the transmission, see Removing the transmission Transmission, Removal.





Continue - Verifying

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Verifying




Verification

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








- Ignition off
- Reconnect the connectors, components, etc.
- Ignition on
Test drive the vehicle following: Test drive schedule, description Test Drive Form, Description
During the test drive, oil temperature should be over 20 °C.
Note any deviations in transmission function.

Does the transmission function flawlessly?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Troubleshooting information

VERIFIED - FAULT FOUND

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Troubleshooting 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 - Check the selector lever position sensor adjustment

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