Volkswagen Golf 1999 Service Manual page 3841

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"Guided
Fault
Finding".
-G65-
monitored
by On
Board
Diagnostics
of Engine
Control
Module
(ECM).
Function:
-F129-
switches
the
coolant
fan -V7-
to next
higher
speed
when
pressure
increases
in
refrigerant
circuit.
-F129-
switches off
A/C clutch
whenever
excessive
refrigerant
system
pressure is
present (e.g.:
insufficient air
flow over
condensor or
if system is
overcharged).
-F129-
switches
off A/C
clutch
whenever
insufficient
refrigerant
system
13/2/2005