Passat Wagon L4-2.0L (ABA) (1995)
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Throttle Position Sensor: Testing and Inspection
Throttle Position Sensor, Checking
THROTTLE POSITION SENSOR, CHECKING
Special tools, testers and auxiliary items
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VAG 1551 Scan Tool (ST) or vehicle system tester VAG 1552 with VAG 1551/3 adapter cable
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VAG 1598/18 test box
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Multimeter (Fluke 83 or equivalent)
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VW 1594 connector test kit
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Wiring diagram
Functional check
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Connect VAG 1551 scan tool (VAG 1552) and insert "Engine Electronics" address word 01. Carry out selection with ignition switched on. Refer
to " On-Board Diagnostic". See: Powertrain Management/Computers and Control Systems/Testing and Inspection
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- to select "Read Measuring Value Block" function 08.
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Press -Q- button to confirm input.
Indicated on display
Read measuring value block
HELP
Input display group number XXX
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Press -0-, -0- and -3- to input display group number 003.
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Press -Q- button to confirm input.
Indicated on display (1, 2, 3 and 4 = Display fields)
Read measuring value block 3
->
1
2
3
4
NOTE: If something different is indicated on the display:
See Scan tool operating instructions.
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Check throttle valve angle at closed throttle position in display field 3.
Specification: 5-19 <°
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Slowly open throttle valve fully and observe angle displayed in display field 3.
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Value must increase uniformly over the complete range
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Check throttle valve angle at wide open throttle position in display field 3.
Specification: 85-101 <°
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Press -> button.
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Press buttons -0- and -6- to select "End Output" function 06.
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Press -Q- button to confirm input.
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Switch ignition off.
NOTE: The displayed value is dependent on the tolerances of the throttle position sensor and does not correspond to the actual opening angle.
If the value does not increase uniformly:
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Replace throttle position sensor.
If the value remains constant:
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Continue check according to following table.
