Vehicles with adjustable throttle position sensor

WARNING: This page is about a different variant/trim than selected.

Vehicles with non-adjustable throttle position sensor

Special tools, testers and auxiliary items required

Fig 1: Identifying Special Tools - Throttle Position Sensor, Checking (Vehicles With Adjustable Throttle Position Sensor)

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Not illustrated:

Special tools, testers and auxiliary items required

Test sequence

Connect scan tool V.A.G 1551 (VAG 1552) and select control module for engine electronics with "address word" 01. For this, the ignition must be switched on: Refer to 01 ON BOARD DIAGNOSTIC (OBD) from M.Y. 99-01 or 01 ON BOARD DIAGNOSTIC (OBD) from M.Y. 2002 and on

Scan tool display:

Quick data transfer HELP
Select function XX

Press buttons 0 and 8 for the function "Reading measuring value blocks" and press Q button to confirm input.

Scan tool display:

Read measuring value block HELP
Enter display group number XXX

Press buttons 0 0 and 2 for the "Display group number 2" and press Q button to confirm input.
Check the reading of the throttle position in display field 2. Do NOT depress the accelerator pedal. Specification: 0.0%

Read measuring value block 2
0/min 0.0% 0 1 0 18.4 ° C

Also, check the reading for the idle switch in display field 3. The center digit must be set at 1. Reading: 010
Slowly depress accelerator pedal and observe display fields 2 and 3.

Read measuring value block 2
0/min 100.0% 0 0 0 18.4

Display field 2: Throttle position value must increase continuously. Specified value for wide open throttle position: 100%
Display field 3: The center digit must change to 0. Reading: 000

NOTE:

On vehicles with automatic transmission, the pressure point of the kick down switch must be felt before reaching the fully depressed accelerator pedal position.

If final specification is not obtained:

Press → button.
Press buttons 0 and 6 for the function "End data transfer" and press Q button to confirm input.
Switch ignition off.
Adjust throttle position sensor G79. Refer to Adjusting Throttle Position (TP) sensor .

If reading does not change or only temporarily:

Check throttle position sensor G79 as follows:
Press → button
Press buttons 0 and 6 for the function "End data transfer" and press Q button to confirm input.
Switch ignition off.

Fig 2: Identifying Sensor Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Measure resistance of sensor between terminals 1 + 3 of connector. Specification: Throttle in idle position: 0.8 to 1.4 kΩ
Measure resistance of sensor between terminals 2 + 3 of connector. Specification: Throttle in idle position: 0.8 to 1.4 kΩ
Check Closed Throttle Position (CTP) Switch F60 in throttle position sensor. For this, measure resistance between terminals 4 + 6 of connector. Specification: Throttle in idle position: 0.8 to 1.2 kΩ. Accelerator pedal depressed: ∞ Ω

Vehicles with automatic transmission

Measure resistance of sensor between terminals 5 + 6 of connector. Specification: Throttle in idle position: ∞ Ω Accelerator pedal depressed: 0.8 to 1.2 kΩ

Continue for all vehicles

If specifications are not obtained:

If specified values are achieved:

Fig 3: Identifying Test Box V.A.G 1598/22 Connected To Control Module Wiring Harness

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Fig 4: Identifying Terminal Pins

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check for open circuits in wires between test box and connector according to wiring diagram. Terminal 1 + Socket 24 Terminal 2 + Socket 11 Terminal 3 + Socket 23 Terminal 4 + Socket 12 Terminal 6 + Socket 25. Vehicles with automatic transmission Terminal 5 + Socket 8 Harness resistance: max. 1.5 Ω
Check wires for short circuit to each other, to vehicle Ground (GND) and to B+. Specification: ∞ Ω

If no malfunction is detected in the wiring:

Replace Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248. Refer to 23 DIESEL FUEL INJECTION for M.Y. 99-01, or 23 DIESEL FUEL INJECTION from M.Y. 2002 and on