Bentley Volkswagen.Golf.Jetta.R32.Official.Factory.Repair.Manual.1999-2005

Climatronic On Board Diagnostic (OBD) through m.y. 2001
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Climatronic On Board
Diagnostic (OBD) through
m.y. 2001
General information
The Climatronic control module receives
information from various electrical and
electronic sensors. This information is
processed by the control module according
to specified values and then provides
corresponding output signals that control
electrical components (actuators).
The Climatronic control module -J255- is
integrated into the A/C Control Head -E87-
and cannot be serviced separately. To
enable recognition of component
malfunctions or if there is an open circuit, the
control module is equipped with Diagnostic
Trouble Code (DTC) memory.
Should a malfunction be detected in a
monitored sensor or component, it is stored
in DTC memory.
When malfunctions which have a permanent
adverse effect on the operation of the
Climatronic are stored in DTC memory, the
A/C control head -E87- display flashes for
approx. 15 seconds when the ignition is
switched on. If there are DTCs that do not
cause the display to flash, the Climatronic
control module allows the Climatronic to
continue to operate in emergency mode at
the settings set on the display.
To determine malfunctions detected by
OBD, initiate the On Board Diagnostic
program and retrieve stored information
using the VAG 1551/1552 Scan Tool (ST) or
VAS 5051 Vehicle Diagnostic Testing and
Information System.
Malfunction information displayed by the
scan tool is listed on DTC tables that contain
notes on possible causes and repairs.
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13/2/2005