remote control AUDI A6 1997 C5 / 2.G AHA Engine Intake Manifold Tuning System Workshop Manual

24-154


Intake Manifold Tuning (IMT)
system

Notes:

The change-over of the manifold from long to
short intake path occurs at approx. 4500 RPM.
Component location page 24
-1

Required special tools and test equipment

VAG1551 or VAG1552 Scan Tool (ST) with
VAG1551/3 adapter cable
VAG1598/22 test box
Multimeter US1119 (Fluke 83 or equivalent)
VW1594 connector test kit
VAG1348/3A remote control connection
VAG1348/3-2 adapter cable
VAG1390 hand pump
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24-162

Vacuum system, checking for leaks


- Let engine run 2 to 3 minutes at idle (for vacuum
to build up).

- Switch ignition off.

- Remove 2-pin connector from intake manifold
tuning valve -N156- (change-over valve).

- Connect jumper wire (from VAG1594) from one terminal of -N156- to
engine ground.
- Use VAG1248/3A remote, adapter wire VAG1348/3-2 and auxiliary
wire to connect second terminal of -N156- to B+.
- Activate intake manifold tuning valve -N156-, using remote control
VAG1348/3A, for approx. 2 to 3 min.
The vacuum solenoid must remain actuated during this time.
Pa
ge 10 of 11 Intake Manifold Tunin
g (IMT
) syste
m
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU03.24.3