With P1953

P17D8

Diagnosis information - PDK

Plausibility check of shift rods

Diagnostic conditions
The control unit initially tests internal function sequences when the ignition is switched on (terminal 15). If they are OK, all diagnosable outputs are then tested and any faults are stored.

- Ignition on
- The following fault is not detected: P1731
- The following fault is not detected: P1732
- The following fault is not detected: P1733
- The following fault is not detected: P1734
- The following fault is not detected: P1706
- The following fault is not detected: P1707
- Pressure regulator 5 not active
- Pressure regulator 6 not active

Possible fault causes
- Hydraulic control unit faulty

Fault setting conditions
- A shift rod moves by more than 2 mm from the neutral position or end position without electrical activation

Fault effects
- Pressure regulator 5 switch-off
- Pressure regulator 6 switch-off
- Engaged gear is held until vehicle stops.
- Only gearshifts in D possible
- Transmission limp-home indication in instrument cluster control unit