Gear selector position sensor - gear engaged
| Gear selector position sensor - gear engaged |
The gear selector position sensor is mounted on the gearcase. 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).
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Lever position, Diesel
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Lever position, Petrol
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A
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B
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C
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PA
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TCM-signal, bus message
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P
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P
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ON
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OFF
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OFF
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ON
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P
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R
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R
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ON
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ON
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OFF
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OFF
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R
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N
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N
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OFF
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ON
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OFF
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ON
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N
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D
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D
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OFF
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ON
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ON
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OFF
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D 1-5
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-
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M
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ON
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ON
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ON
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ON
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M 1-5
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4
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-
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ON
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ON
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ON
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ON
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4
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3
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-
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ON
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OFF
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ON
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OFF
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3
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L
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L
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OFF
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OFF
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ON
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ON
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1-2
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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.
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Gear selector position sensor terminals
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A
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B
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C
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PA
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Connector H16-7, pin
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3
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4
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5
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6
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Control module, pin
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6 (B)
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16 (B)
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7 (B)
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17 (B)
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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 P0705If the diagnostic trouble code is generated the gearbox goes into the limp-home mode.
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