Throttle Position Sensor: Service and Repair
Throttle Position (TP) sensor, removing, installing, and adjustingSpecial tools, testers and auxiliary items
VAG1551 or VAG1552 Scan Tool
VAG1551/3 adaptor cable
Box wrench e.g. Hazel 4561
Removing
Remove instrument panel and pedal cluster cover
Remove accelerator pedal -6-
Remove throttle position sensor -2- with bracket -3-, by removing both mounting nuts -8- with 1/4-in. drive tools.
Remove cable cam -4- and unscrew sensor from bracket.
Installing
Secure throttle position sensor to bracket
Attach cable cam to sensor
Check attachment to make sure that dimensions -a- and -b- are as specified when facing forward (arrow -c-)
a = 22 ±0.05 mm (0.866 ±0.002 in)
b = 41 ±0.05 mm (1.614 ±0.002 in)
Note: The cable cam eye must be parallel to the forward direction
Install sensor with bracket
Install accelerator pedal cable and mount cable cam eye pin on accelerator pedal
Adjusting:
- Connect VAG 1551/1552 Scan Tool
- Switch ignition on
- Press -0- and -1- buttons to insert "engine electronics" address word 01
Display will appear as shown:
Rapid data transfer HELP
select function XX
- Press -0- and -8- buttons to select "Read Measuring Value Block" function 08, and press -Q- button to confirm input
Display will appear as shown:
Read measuring value block HELP
Input display group number XX
- Press -0-, -0- and -2- buttons to input display group 02 (002), and press -Q- button to confirm input
Display will appear as shown:
Read measuring value block 2 ->
0 rpm 0.0% 0 1 0 18.4°C
Check throttle position in display field 2
Accelerator pedal not depressed (at rest position)
Specification: 0.0%
- Fully (slowly) depress accelerator pedal while watching value in display field 2
Display will appear as shown:
Read measuring value block 2 ->
0 rpm 100% 0 1 0 18.4°C
Throttle position value must increase continuously and then display 100% just before the Wide Open Throttle stop
If necessary, adjust throttle position as follows
Turn adjustment screw -7- until Closed Throttle Position (CTP) display shows 0.0%
Depress accelerator pedal to point just before Wide Open Throttle (WOT)
Display must show 100%.
Check and erase DTC memory
Recreate readiness code