Actuators

Logic of naming actuators in VW-group is simple it contains "N" + actuator number. The actuator number is unique. Here you can find fitting location, connectors and some basic information about actuators.

To our mind, actuators information is reference, so there is only simple search by number.

N

Audi A6 4B (1998-2005)
Audi A8 4D (1994-2002)
Audi A8 4E (2002 -)
Audi A6 4F (2005- )
Audi A3 8P (2003- )
N156_4B_24_ANK_4_0801_21

Intake manifold changeover

 

The check is only required if there is a lack of power above specific engine speed ranges or if a fault is stored.

 

The changeover of the intake manifold from the long to the short intake travel occurs dependent on engine speed.

 

Measured value block 095 is used to display the intake manifold changeover.

 

 

A6 vehicles

 

Measured value block 095:

1) Engine speed [ rpm]

2) Load [%]

3) Coolant temperature [C]

80 - 105

4) Intake manifold changeover [SU-V OFF / stage 1 / stage 2]

stage 1 / stage 2

 

Increase the engine speed to the following engine speeds to initiate the intake manifold changeover.

 

Capacity Engine speed Vacuum unit

4.2 l approx. 3400 rpm Stage 1 lower unit

4.2 l approx. 5300 rpm Stage 2 Upper unit

 

Observe the changeover on the vacuum unit (fitting location is on intake pipe at front)

If stage 1 or stage 2 is displayed but the intake manifold changeover has not started

(units must drain), refer to the test plan.

 

 

S6 vehicles

 

On all S6 vehicles the first stage of the intake manifold changeover is omitted!

Both pressure units are actuated by the intake manifold changeover solenoid valve -N156.

 

Additionally in the S6 the valve N331 (in the A6: N261) operates a flap in the air cleaner dependent on load and engine speed.

 

Measured value block 095:

1) Engine speed [ rpm]

2) Load [%]

3) Coolant temperature [C]

80 - 105

4) Intake manifold changeover [ SU-V OFF / SU-V ON]

SU-V ON

 

Increase the engine speed to approx. 5400 rpm to initiate the intake manifold changeover.

 

Observe the changeover on the vacuum unit (fitting location is on intake pipe at front)

If SU-V ON is displayed but the intake manifold changeover has not started

(units must drain), refer to the test plan.

 

 




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November 30, 2012
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