Bus Messages, TCM

Bus messages, TCM
For further information on the bus, see System overview, bus and diagnostics communication, petrol

The TCM uses the following information:





The TCM sends the following information:





Gear selector position sensor - gear engaged








The gear selector position sensor is mounted on the gear case. It contains the reversing light switch, starting interlock switch and switches which tell the control module which gear is engaged.

The gear selector position sensor is a position switch that is supplied with current via the +15 circuit. A number of slip contacts supply the sensor's outputs with current. Combinations of the A, B, C and PA terminals correspond to the current selector lever position (see table). The slip contacts may be either closed (=ON) or open (=OFF).








The following table shows the relationship between the gear selector position sensor's internal terminals (A, B, C and PA) and the pins of connector H16-7 and those of the transmission control module.





To ensure that the control module receives accurate information, it is important for the sensor to be correctly adjusted. Special tool 87 92 467 should be used for adjusting the sensor.

Diagnostics
A gear position fault will generate diagnostic trouble code P0705

If the diagnostic trouble code is generated the gearbox goes into the limp-home mode.