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_4D_24_AKC_2_0401_21
N156_4D_24_AKC_3_0401_21
N156_4D_24_AKC_4_0401_21
N156_4D_24_AUX_2_0200_23
N156_4D_24_AUX_3_0200_23

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.

 

 

A8 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

3.7 l approx. 3300 rpm Stage 1 lower unit

3.7 l approx. 5000 rpm Stage 2 Upper unit

 

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.

 

 

S8 vehicles

 

On all S8 vehicles the first stage of the intake manifold changeover is omitted!

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

 

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 units (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.




Site news

November 30, 2012
Content update We are starting big site update. We are sorry for bugs and missed content.
We are especially grateful for financial support of our site

User Name
Password
Forgot your password?
Register
.