Fault Code 1681
Fault code 1681Speed signal, rear left wheel
Diagnostic conditions
- Ignition on
- Internal control module function test
- Vehicle speed greater than 0 km/h
Possible cause of fault
- Signal from PSM control module does not correspond to expected signal (please read out fault memory)
- Signal from PSM control module does not correspond to expected signal (implausible signal)
Affected pins
Tiptronic control module plug:
- Pin 34 'CAN drive (low)'
- Pin 46 'CAN drive (high)'
Diagnosis/troubleshooting G 0210
NOTE: If there is no incoming signal via the CAN drive using several control modules, the CAN drive must be checked for open or short circuits. Refer to 'Checking instructions/CAN data bus'.
