Transmission Position Sensor/Switch: Testing and Inspection

Driving Range Signal, Checking

Vehicles with automatic transmission only
Engine control module receives following information from transmission control module:
- Driving range selected (selector lever in 2/3/4/R/D) or
- No driving range selected (selector lever in P or N)

Special tools and equipment
- Scan tool VAG 1551 or vehicle system tester VAG 1552 with cable VAG 1551/3
- Test box VAG 1598/31
- Hand multimeter VAG 1526 or multimeter VAG 1715
- Adapter set VAG 1594
- Wiring diagram

Test conditions
- The selector lever of the automatic transmission must be in "P" or "N" position.

Test sequence
- Connect scan tool VAG 1551 (VAG 1552). Then switch ignition on and select engine control module with "Address word" 01.

(Connecting scan tool and selecting engine control module). Refer to "Connecting and Selecting "Engine Electronics" Address Word 01" [1][2][3][4][5]Connecting VAG 1551 Scan Tool

Indicated on display:


Rapid data transfer HELP
Select function XX


- Press keys 0 and 8 for function "Read measured value block" and confirm entry with Q key.

Indicated on display:


Read measured value block HELP
Input display group number XXX


- Press keys 0, 5 and 6 for "Display group number 56" and confirm entry with Q key.

Indicated on display: (1-4 = Display zones)


Read measured value block 56 ->
1 2 3 4


- Observe display zone 4. The display must read
Specification: x x x 0 x "Neutral".
- Depress foot brake and select driving range. Display must jump to
Specification: x x x 1 x "Gear engaged".
- Press -> key.
- Press keys 0 and 6 for "End output" function and confirm input with the Q key.
- Switch off ignition.

If the display does not change:
- Checking data bus Testing and Inspection