key AUDI A4 1999 B5 / 1.G AWM Engine Charge Air Syst

21-11

Note:

Hose connections must be completely airtight,
otherwise measurements will not be correct.
Ensure that measuring hose is not pinched at
hood or side window.
Pressing memory key M on turbocharger tester
will store the last measured value until memory
key M is pressed again or tester is switched off.
The decimal point in the display flashes to
indicate that the value is being stored.
If the battery voltage of the turbocharger tester
drops below the minimum level, an arrow will
appear at the top left of the display.
Before checking, drive vehicle quickly for at
least 3 km (choose a safe route that does not
include stopping).
A second mechanic is required to note readings
with the vehicle moving.
Pa
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11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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21-12

Read measured value block 115
1
2
3
4

Note:
The charge pressure level is measured with turbocharger tester VAG
1397/A. The vehicle diagnostic, measuring and information system VAS
5051 or the VAG 1551 Scan Tool is used to check whether the charge
pressure is being registered by the control module. - Read measured value block Display group 115, engine idling.
- Accelerate vehicle from 2000 rpm at wide open throttle in third gear,
and observe rev counter.
- At approx. 2500 rpm press print key on VAS 5051 or PRINT key on
VAG 1551 and at same time press recall button -M- on VAG 1397 A.

Specified value on VAG 1397 A: 1.700 to 1.800 bar
Read measured value block 115
1
2
3
4

If specified value not attained table, Page 21
-13

Specified value on VAG 1551 or on VAS 5051 in display zone 4: 1700
to 1800 mbar
Pa
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ystem with turbochar
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11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE06.21.1