Throttle Position Sensor: Testing and Inspection
Throttle position (TP) sensor, checkingVehicles with automatic transmissions:
- the harness with the 4 pin connector leads to the transmission control module (J 217)
- if the throttle position (TP) sensor is replaced, the transmission control module (J 217) must "learn" the voltage value of the new potentiometer
Requirement
- VAG 1551 Scan Tool connected
- switch ON ignition
- press 1 button to select operating mode "Rapid Data Transfer"
- display will appear as shown
- press 0 and 1 buttons to select address word "Engine Electronics"
- display will appear as shown
- press Q button to enter input
- press => button
- press 0 and 8 buttons to select 08 "Read test value block"
- press Q button to enter input
- display will appear as shown
- press 0 and 3 buttons to select display group 03
- display will appear as shown
- press Q button to enter input
- display will appear as shown
- observe "throttle angle" in channel 3 of display
- displayed value must be 9 to 19 <°
- open throttle slowly
- displayed value must be uniform and increase without interruption
- with throttle completely open displayed value must be 94 to 101 <°
- press => button
If NO
- press 0 and 6 buttons to select function 06 "Ending output"
- display will appear as shown
- press Q button to enter input
- perform electrical checks
- if necessary replace TP (throttle position) sensor (G69)
NOTE:
When repairing a connection to or replacing an engine management system component (i.e. Knock Sensor, Mass Air Flow Sensor, Throttle Position Sensor, etc.), ensure the mating connector terminals are made of the same material and that the terminals are not damaged or corroded.
If the component has gold plated terminals but the harness does not, replace the mating harness connector terminals with gold plated terminals. If the mating harness has gold plated terminals but the component does not, replace the component.