Test Point 14

TEST POINT 14
Gear Sel. monitor, Output Drive Signal Implausible

DTC 90

Fault Effect: Reduced driving program.

Note:
The ratio of transmission input speed/transmission output speed is monitored.

1. Test sender for the transmission speed on Tiptronic control module connector pin 14 and pin 42 with an ohmmeter.

Nominal value: 0.8 - 1.2 kohms

2. Check wiring from control module pin 42 (or 14) to the 16-pole transmission connector pin 10 (or 1) for open circuit, short to ground and short to B+.

3. Check shield on control module connector pin 15.

4. Test sender on transmission socket pin 10 and pin 1 with an ohmmeter.

Nominal value: 0.80... 1.2 kohms

Note:
The ATF pan must be removed before the sender can be replaced.

5. If items 1 - 4 are OK and no other faults are stored, there is a mechanical/hydraulic fault in the transmission (e.g. ATF level not OK, slipping clutches or brakes).