Jetta L4-1781cc 1.8L SOHC (ACC) Can (1995)
Throttle Position Sensor: Testing and Inspection
Throttle Position (TP) Sensor, checking
Note: On vehicles with automatic transmission, the Throttle Position (TP) Sensor (G69) includes two sensors installed in one housing. To check the
second sensor (automatic transmission only)refer to Automatic Transmission 096, Repair.
^ Battery Positive Voltage (B+) OK
^ Fuse 22 (S22) OK
^ Ground (GND) connections on engine and transmission OK (location: below lower section of intake manifold)
^ VAG 1551 Scan Tool (ST) connected See: Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Connecting and Initial
Checks/Connecting VAG 1551 Scan Tool
-
Switch ignition ON.
-
Operate VAG 1551 Scan Tool (ST) according to information indicated on display.
-
Press button -1- for "Rapid data transfer" operating mode.
-
Press buttons -0- and -1- to enter address word 01 for "Engine Electronics."
-
Press -Q- button to confirm input.
-
Press => button.
-
Press buttons -0- and -8- to select the "Read Measuring Value Block" function.
-
Press -Q- button to confirm input.
-
Indicated on display
[Read measuring value block
HELP ]
[Enter display group number XX
]
-
Press button -0- twice to enter display group number 00, and press -Q- button to confirm input.
-
Indicated on display
(1-10 = display fields)
[Read measuring value block
=> ]
[1 2 3 4 5 6 7 8 0 10
]
-
Slowly open throttle valve fully and watch numbers in display fields -2- and -3-.
Display field -2-:
^ Value must increase steadily until throttle is 1/4 open; from then on, value must not change
Display field -3-:
^ Value must increase uniformly over entire range
-
Press => button.
-
Press buttons -0- and -6- to select the "End Output" function.
-
Press -Q- button to confirm input.
If the values displayed are not as specified:
-
Perform electrical tests See: Testing and Inspection/Pinout Values and Diagnostic Parameters