Work step: 19

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 1999 Volkswagen Jetta, 1999 Volkswagen Golf, 1999 Volkswagen Cabrio, 1998 Volkswagen Jetta, and 1998 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.

Diagnostic: Throttle valve control module

NOTE: There are no specifications for this diagnostic test. The values in display fields are typical. Obtaining other values does not indicate a system malfunction. The diagnostic functions run in the background during the check.

Display will appear as shown

Fig 1: VAG 1551/1552 Scan Tool Display: Readiness Code, Creating, Work Step 19 (1 Of 3)

Press -1-, -4- and -0- buttons to input display group 140.
Press -Q- button to confirm input.

Display will appear as shown (1 to 4 = display fields)

Fig 2: VAG 1551/1552 Scan Tool Display: Readiness Code, Creating, Work Step 19 (2 Of 3)

Run engine at idle.

DISPLAY GROUP: 140, FUNCTION: 04

	Display fields
	1	2	3	4
Display group: 140 Function: 04
Display	x.xx ms	xx %	x.x V	xxxx xxxx
Indicated	Engine load	Current throttle motor position	Throttle position sensor voltage	Diagnostic conditions
Specification	1.4 to 2.4 ms	65 to 85 %	3.0 to 5.0 V	-

Press up arrow button

Display will appear as shown (1 -4 = display fields)

Fig 3: VAG 1551/1552 Scan Tool Display: Readiness Code, Creating, Work Step 19 (3 Of 3)

Run engine at idle.

DISPLAY GROUP: 141, FUNCTION: 04

	Display fields
	1	2	3	4
Display group: 141 Function: 04
Display	xx %	xxx %	xxx	xxxx xxxx
Indicated	-	Target throttle motor position	Throttle position controller	Diagnostic conditions
Specification	65 to 85 %	65 to 85 %	90 to 170	-
	Actual position of throttle valve	Actual position of throttle valve	Actual position of throttle valve

Press -3- button (VAG 1551 scan tool) or up arrow button (VAG 1552).

Display will advance as shown (1 to 4 = display fields)

Fig 4: VAG 1551/1552 Scan Tool Display For Work Step 19 (3 Of 3)

Run engine at idle.

DISPLAY GROUP: 142, FUNCTION: 04

	Display fields
	1	2	3	4
Display group: 142 Function: 04
Display	xx %	xxx %	xxx	xxxx xxxx
Indicated	Throttle valve actuator	Throttle valve actuator	Throttle valve actuator	Diagnostic conditions
Specification	65 to 85 %	65 to 85 %	3 - 24 %	-
Specification	Throttle valve actuator emergency running cross section	Throttle valve actuator minimum stop	Throttle valve actuator maximum stop

Press --> button