warning AUDI A4 1997 B5 / 1.G AEB ATW Engines Charge Air System With Turbocharger Workshop Manual

21-55

Test requirements

All hoses and wires have been checked for
proper seating and seal.
DTC memory checked

Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel
Injection & Ignition, Repair Group 01

Output Diagnostic Test Mode (DTM)
performed

Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel
Injection & Ignition, Repair Group 01

Vehicle tester VAS 5051 or VAG 1551
connected.

Test sequence

WARNING!

To reduce the risk of accident or injury while
carrying out tests and measurements during
a road test, observe safety precautions
Page 21
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ge air s
ystem with turbochar
ger
(en
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)
11/18/2002 htt
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The shop air supply line will later be attached to the inlet of VAG 1687. - Close valve -3- before gauge.
- Close valve -4- after gauge.
- Remove female fitting from tester (arrow) and install an appropriate
"male" air fitting that will connect to your shop air supply line (
WARNING!).
Pa
ge 32 of 42 Char
ge air s
ystem with turbochar
ger
(en
gine code ATW
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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pair&id=AUDI.B5.GE02.21.3

21-71

WARNING!

Use only approved air fittings to adapt shop
air supply line to VAG 1687 tester.

Special tool VAG 1687/1 pressure adapter,
installing (1.8L Turbo)

- Separate intake hose from Mass Air Flow (MAF)
sensor assembly.

Special tool VAG 1687/1 pressure adapter, installing (2.7L BiTurbo)
Repair Manual, Maintenance; Air cleaner housing, cleaning; Air cleaner element, replacing
- Insert VAG 1687/1 pressure adapter in intake hose -black arrow- using
existing clamp (as shown).
- Remove crankcase ventilation tube from intake hose at -white arrow-.
- Remove upper air cleaner housing and hoses to intake manifold as
necessary

- Insert VAG 1687/1 pressure adapter in intake hose -white arrow- using
existing clamp (as shown).
- Disconnect engine crankcase ventilation hose from intake manifold -
black arrow-.
-
Plug intake manifold fitting (for crankcase ventilation hose) with
appropriate hose and metal plug using clamps supplied with VAG
Pa
ge 33 of 42 Char
ge air s
ystem with turbochar
ger
(en
gine code ATW
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.21.3