Transmission Position Sensor/Switch: Testing and Inspection

Transmission Driving Range Signal Check

Vehicles with automatic transmission only

The engine control module receives the following information from the transmission control module:
- Driving range selected (selector lever in 2/3/4/R/D) or
- No driving range selected (selector lever in P (Park) or N (Neutral))

Special tools and equipment
- V.A.G1551 Scan Tool (ST) or VAG1552 mobile scan tool with VAG1551/3 adapter cable
- VAG1598/22 test box
- Multimeter (Fluke 83 or equivalent)
- VW1594 adapter set
- Wiring diagram

Test conditions
- Automatic transmission selector lever in P (Park) or N (Neutral) position
- Turn off air conditioner

Test sequence
- Connect V.A.G1551 (VAG1552) Scan Tool (ST). Refer to "Scan Tool Testing/VAG1551/Functional Check" under "Powertrain Management/Computers and Control Systems" Testing and Inspection
- Turn on ignition and press buttons -0- and -1- to insert "Engine Electronics" 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 and press -Q- button to confirm input.

Indicated on display


Read Measuring Value Block
Input display group number XXX


- Press buttons -0-, -5- and -6- to input display group number 56 (056) and press -Q- button to confirm input.

Indicated on display: (1-4 = display fields)


Read Measuring Value Block 56 ->
1 2 3 4


- Check specified values in display field 4:

Display Group 56:

If the specified values are not obtained:
- Press -> button.
- Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
- Turn off ignition.

Explanation of 4 digit number block







Continuation

If the specified values are not obtained:
- Press -> button.
- Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
- Turn off ignition.
- Check CAN-Bus. Refer to "CAN-Bus, Checking (From M.Y. 2000)" under " under "Powertrain Management/Computers and Control Systems/Information Bus".