Chassis Number 26213 - 999999
Incorrect gear ratio
Checking the control module and transmission version
- Ignition on
- Read off the part number (P/N) of the control module (software)
- Read off the transmission P/N.
Compare the software and transmission P/Ns with the engine specifications. Check that these correspond. If the control module or software does not correspond, replace with the correct version.
Select an option:
1. The P/Ns correspond
2. The transmission P/N does not correspond
3. The software P/N does not correspond.
1 - Checking the adjustment of the gear-shift position sensor
2 - Replacing the transmission
3 - Ordering software
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Ordering software
The control module can be programmed with new software. The software must be replaced to remedy the fault.
Order applicable software.
Continue - Programming the control module
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Programming the control module
Programming can be carried out when the software has been delivered.
Program the control module according to the table below.
Continue - DONE
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Checking the adjustment of the gear-shift position sensor
- Ignition on
- Read off the position of the gear selector.
Move the gear selector into all positions. Check that the gear-shift positions are updated.
Hint: If the display shows an undefined position (O2 for example) the gear position sensor is incorrectly adjusted.
Remedy as necessary
Other information:
- To adjust the gear-shift position sensor, see Gear-shift position sensor, checking/adjusting, B5254T2, AW55-50/51SN, B5254T2, AW50/51 AWD Adjustments.
Is the gear-shift position sensor incorrectly adjusted?
Yes - Verification
No - Checking for contact resistance and oxidation
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Checking noise in the transmission
- Test drive the car. See Test drive schedule, description, B5244T5, AW55-50/51SN, B5254T2, AW55-50/51SN, B5254T2, AW50/51 AWD Test Drive Schedule, Description
- Check for any clearly audible noises from the transmission. Check for malfunctions.
Is the transmission making a noise?
Yes - Replacing the transmission
No - Fault Found
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Checking for contact resistance and oxidation
- Ignition off.
Check the transmission connectors and the control module connector. Check for contact resistance and oxidation. See Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Other information:
- To access the transmission connectors, see Connectors, transmission, disconnecting / connecting, B5244T5, AW55-50/51SN, B5254T2, AW55-50/51SN, B5254T2, AW50/51 AWD Procedures.
Continue - Checking noise in the transmission
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Replacing the transmission
Note! In the event of faults during the first year on the market, replace transmission AW55-50SN.
Replace the transmission. See Transmission, removing Transmission, Removing Transmission, installation Transmission, Installation.
Continue - Verification
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Verification
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 Schedule, 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 FAILEDPAPER
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - Fault Found
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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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FAULT-TRACING FAILED - FAULT-TRACING FAILED
Attempt New Test - Checking the control module and transmission version
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