Check the sensor
Check the sensor for contamination
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Transmission range sensor circuit
The transmission range sensor determines the transmission speed. The transmission control system uses this information to, for example, calculate which gear is required and the shifting time. Scroll through this page and find out about common variants, their functional principle, and how you can check transmission range sensors using simple methods.
How transmission range sensors work
Checking the transmission range sensor
1
2
Check the encoder wheel
Check the encoder wheel for damage
3
Read out fault memory
Read out the fault memory
4
Measure the resistance of the inductive sensor using an ohmmeter
Reference value at 80°C: approx. 1,000 ohms.
5
Check the supply voltage to the Hall generator using a voltmeter
(circuit diagram for pin assignment required).
Attention:
Do not measure the resistance on the Hall generator as doing so could destroy the sensor.
6
Check the continuity of the sensor's connecting lines between the control unit connector and sensor connector
(circuit diagram for pin assignment required).
Reference value: 0 ohm.
7
Check the sensor's connecting lines for a short circuit to frame
With the control unit connector pulled out, measure against vehicle ground at the sensor connector using the ohmmeter.
Reference value: >30 MOhm.
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