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Gear selector position sensor - gear engaged

Gear selector position sensor - gear engaged


The gear selector position sensor is mounted on the transmission casing. 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).

A

B

C

PA

P

ON

OFF

OFF

ON

R

ON

ON

OFF

OFF

N

OFF

ON

OFF

ON

D

OFF

ON

ON

OFF

3

ON

ON

ON

ON

2

ON

OFF

ON

OFF

1

OFF

OFF

ON

ON




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 H10-7 and those of the transmission control module.

Gear selector position sensor terminals

A

B

C

PA

Connector H10-7, pin

1

2

3

4

Control module, pin

13

28

14

29



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

In the event of a fault in the selector lever position inputs, diagnostic trouble code P0705 will be generated and the transmission will go into Limp-Home mode.