Transmission Position Sensor/Switch: Testing and Inspection

Selector Lever Position Signal, Checking

Only for vehicles with automatic transmission
The Engine Control Module (ECM) receives the following information from the transmission control module:
- Driving position selected (selector lever in 2/3/4/R/D) or
- no driving position selected (selector lever in P or N)

Special tools and equipment
- VAG1551 Scan Tool (or VAG1552 mobile scan tool) with VAG1551/3 cable
- VAG1598/31 test box
- VAG1526 multimeter or VAG1715 multimeter
- VAG1594 connector test kit
- Wiring diagram

Test condition
- Selector lever of automatic transmission must be in "P" or "N".
Test sequence
- Connect VAG 1551 scan tool (VAG1552). Switch ignition on and select Engine Control Module (ECM) using address word 01.

Indicated on display


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -8- to select "Read measuring value block" function 08. Press -Q- button to confirm input.

Indicated on display


Read Measuring Value Block HELP
Input display group number XXX


- Press 0, 5 and 6 for the function "display group number 56", and then press Q to exit from input mode.

Indicated on display (1-4 display fields)


Read Measuring Value Block 56 ->
1 2 3 4


- Observe display field 4. Reading should be
Specification: x x x 0 x "Neutral" on display.
- Press brake pedal and select driving position. Reading should be
Specification: x x x 1 x "DrivePos. ON" on the display.
- Press -> button.
- Press buttons -0- and -6- to select "End Output" function 06. Press -Q- button to confirm input.
- Switch ignition off.

If reading does not change:
- Test data bus. Testing and Inspection