Checking and adjusting idling switch -F60 and full throttle switch -F81 — AUDI

Special tools and workshop equipment required

Angle reader 3084
V.A.G 1526 A
V.A.G 1594 A
V.A.G 1598 A
V.A.G 1598/3
VAS 5051 with VAS 5051/1 and VAS 5051/2

or

V.A.G 1551 with V.A.G 1551/1
Feeler gauge

Fitting location => Fitting locations overview, Page
25-5

Note:

Idling switch -F60 and full throttle switch -F81 have a common connector.

Test requirements:

Basic setting of throttle valve OK; check => Page
25-56
.

Test sequence

Read measured value block 0
⇒
1
2
3
4
5
6
7
8
9
10
Read measured value block, display group 000, ignition switched on =>Page
01-47
.
Check display in display zone 9.
Specification: 5

Slightly open throttle valve.
The value must drop to 4
Window between throttle valve stop and adjustment screw 0.15 ... 0.50 mm (measured with feeler gauge)

Press throttle valve lever into full throttle.
Value must increase to 6.

If the display changes sooner or later:

Adjust idling switch => Page
25-43
.

If the display does not change:

Checking wiring

Pull connector off throttle valve -arrow-.

Note:

Idling switch -F60 and full throttle switch -F81 have a common connector.

Connect up multimeter as follows to measure voltage.

Connector / contact · Measure to
2 · Battery positive

Specification: approx. battery voltage

If the specification is not obtained:

Eliminate open circuit or short circuit using the current flow diagram.

If the specification is obtained:

With the ignition switched off, use adapter V.A.G 1598/3 to connect test box V.A.G 1598 A to plug connection of engine control unit (control unit remains disconnected) => Page
25-10
.

Check for open circuit and short to positive or earth in the following wiring connections:

Connector / contact · Test box V.A.G 1598 A / socket
1 · 28
3 · 32

Rectify any open/short circuit as necessary.

=> "Current Flow Diagrams, Electrical Fault-finding and Fitting Locations" binder

Adjust idling switch -F60

Remove the throttle valve unit.

Connect multimeter between contacts 1 and 2 to measure resistance.

Slacken bolts of idling switch and adjust switching point by pushing switch into longitudinal slots.

Feeler gauge not inserted:

Specification: 0 ω

Feeler gauge 0.3 mm inserted:

Specification: ∞ω (no continuity)

If the specified values are attained:

Tighten fastening bolts and secure with locking paint.

If the specified values are not obtained:

Replace and adjust idling switch -F60 and full throttle switch -F81

Note:

If a defect is detected on one of the switches always replace both switches.

Adjust full throttle switch -F81

Connect multimeter between contacts 2 and 3 to measure resistance.

Secure pointer for angle reader 3084 to throttle valve part.
Open throttle valves and secure graduated disc for angle reader 3084 with the solenoid adapter 3084/1 to throttle valve shaft of 2nd stage.
Slacken bolts of full throttle switch and adjust switching point by pushing switch into longitudinal slots.
Press throttle valve lever to full throttle arrow and set degree disc to "0".
Close throttle valve approx. 30o and again push slowly in direction of full throttle stop until full throttle switch -1- switches on.
Specification: 0 ω
at switching point 10 ± 2o before full load stop

If the specification is obtained:

Tighten fastening bolts and secure with locking paint.

If the specification is not obtained:

Replace and adjust idling switch -F60 and full throttle switch -F81