55 Gear Comparison Negative (Several Times)

P0730

55 Gear comparison negative (several times)
The target gear predetermined by the Tiptronic control module is compared with the current gear. The fault is set if the recognised gear differs from the target gear. The recognised gear is determined by the gear speeds n2 and n3 and by the output shaft speed.

Diagnosis conditions
- Ignition on
- No active gearshift
- No speed n2 fault
- Engine speed n2 [>] 150 rpm
- No selector lever fault
- No CAN fault
- No PSM fault
- At least one plausible rear PSM wheel speed
- All plausible PSM wheel speeds [>] 50 rpm
- Difference between right and left wheel speed [<] 100 rpm (rear and front)
- Output shaft speed [>] 180 rpm
- Engine speed [>] 450 rpm

Possible fault cause

NOTE: A fault exists in the mechanical/hydraulic transmission parts.

- Oil pump is faulty
- Driving element of the selector valve is damaged
- Selector valve is jammed
- Control unit screws are loose

Affected terminals


Diagnosis/Troubleshooting