Transmission Position Sensor/Switch: Testing and Inspection
Vehicles with automatic transmission only
The engine control module receives the following information from the transmission control module:
- Driving range selected (selector lever in 1/2/3/R/D) or
- No driving range selected (selector lever in P or N)
Special tools and equipment
- VAG1551 Scan Tool (ST) or VAG1552 mobile scan tool with VAG1551/3 adapter cable
- VAG1598/31 test box
- Multimeter (Fluke 83 or equivalent)
- VW1594 adapter set
- Wiring diagram
Test conditions
- Automatic transmission selector lever in "P" or "N" position
- Air conditioner switched off
Test sequence
- Connect VAG1551 (VAG1552) Scan Tool (ST). Refer to "On Board Diagnostic (OBD)/VAG1551 Scan Tool (ST), Connecting and Selecting Functions" under "Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector", Testing and Inspection
- Switch ignition on 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 -1- to in put display group number 51(051) and press -Q- button to confirm input.
Indicated on display: (1-4 = display fields)
Read Measuring Value Block 51 ->
1 2 3 4
- Check specified values in display field 3:
Display Group 051:
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.
- Switch ignition off.
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.
- Switch ignition off.
- Check CAN-Bus. Refer to "CAN-Bus, Checking (Through M.Y. 1999)" under "Powertrain Management/Computers and Control Systems/Data Link Connector",