21-1
Charge air system with
turbocharger, checking
Notes:
For cleanliness rules, see Page 21
-44
.
Secure all hose connections with the correct
hose clips (same as original equipment):
Parts Catalog
Before performing a check or repair, all hoses
and lines must be checked for tight seating and
leaks.
Always replace seals, gaskets and self-locking
nuts.
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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
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