P0722

P0722 (Porsche codes 36 and 90)
Speed sensor - signal implausible
Transmission output speed monitoring - signal implausible

Function:
The transmission output speed/engine speed ratio or transmission input speed/transmission output speed ratio is monitored.
The "reduced driving programme" is activated if the signal is incorrect.

Diagnosis Conditions:



- Selector lever position "D," Gear 2, 3, 4 or 5
- ATF temperature > 60 °C
- Engine speed > 3104 rpm

Wiring Diagram:

Transmission Speed Sensor:

Transmission Input Speed Sensor:

Diagnosis Procedure:







1 Check sensor for transmission speed with wiring.
1. Remove Tiptronic control module connector.
2. Connect ohmmeter to Tiptronic control module connector pin 14 and pin 42.

Display: 0.80...1.2 kohm.

2 Check sensor for transmission input speed with wiring.
1. Remove Tiptronic control module connector.
2. Connect ohmmeter to Tiptronic control module connector pin 16 and pin 46.

Display: 230 ... 300 ohm.