cooling AUDI A4 1998 B5 / 1.G AC System On Board Diagnostic Workshop Manual

01-20

If no DTC are displayed and A/C system
complaints exist (e.g. compressor does not
run or only occasionally, system control
unsatisfactory, speed of fresh air blower
cannot be regulated etc.):

- Read measuring value block (function 08).

- Perform Output Diagnostic Test Mode (DTM)
(function 03).

- Check A/C system cooling performance page
87
-213
.

- VAG1551 Scan Tool (ST) can be returned to the
function mode by pressing the button. Rapid data transfer
HELP
Select function XX

Indicated on display (function selection)
- End output (function 06) page 01
-56
.
- Switch ignition off and disconnect VAG1551 Scan Tool (ST) from Data
Link Connector (DLC).
Pa
ge 26 of 91 A/C s
ystem, On Board Dia
gnostic
(OBD
)
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