Volkswagen Golf / Golf GTI / Jetta. Manual — part 1103

27-143

Cruise Control System
(CCS) from m.y. 2002

General information

All cruise control system functions are

controlled by the applicable Engine Control
Module (ECM). The processing of electronic
engine controls and cruise control functions
are integrated in the ECM. Other than the
cruise control switches on the steering
column/multifunction steering wheel, the
clutch and brake pedal switches and related
wiring, there are no separate cruise control
components to be serviced.

As all electronic throttle control operations

are monitored by On Board Diagnostic
(OBD), Diagnostic Trouble Codes (DTC)
pertaining to engine electronics that are
stored in DTC memory may be relevant to
cruise control function.

Always check DTC memory first before

troubleshooting.

All CCS troubleshooting and OBD

program functions on vehicles from m.y.
2002 should be performed using the VAS
5051 / 5052 Vehicle Diagnostic Testing
and Information System in operating
mode "Guided Fault Finding" or "Vehicle
Self-Diagnosis"

Cruise Control System (CCS) from m.y. 2002

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90-1

Instrument cluster

General information

The instrument cluster contains an electronic

speedometer, tachometer, liquid crystal (LCD)
displays for odometer, trip odometer/clock, as
well as analog coolant temperature and fuel level
gauges. Control and warning lamps are situated
within and between the speedometer and
tachometer. Automatic transmission models also
contain an LCD gear indicator display.

An LCD multi-function trip computer (MFI) with

two operating modes is available on some
models. When equipped, the MFI display is
located between in the tachometer and
speedometer. MFI functions include selectable
displays for trip time/mileage, average trip speed,
average trip fuel consumption and outside
temperature.

The instrument cluster also supplements various

warning lamp displays with control module-
controlled acoustic warnings.

Notes on replacing instrument cluster

Do not disassemble instrument cluster.

All control and warning lights are Light Emitting

Diodes (LEDs) which cannot be serviced
separately. LED malfunctions require
replacement of instrument cluster.

Instrument clusters contain no field serviceable

components. Malfunctions require replacement
of instrument cluster.

Instrument cluster

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90-2

When the replacement of a malfunctioning

instrument cluster is necessary, follow
exchange part procedures.

Complete report form and return together with

inst. cluster.

Use the original packaging from the new cluster

when returning modules.

The odometer reading must be matched to the

new/exchange instrument cluster.

Through m.y. 1999:

Repair Manual, Electrical Equipment On

Board Diagnostic (OBD), Repair Group 01.

From m.y. 2000:

VAS 5051/5052 Vehicle Diagnostic Testing

and Information System in mode "Guided Fault
Finding"

Additional information:

Complaint/symptom based repairs ("Service

Fixes")

Technical Bulletins

Instrument cluster, On Board Diagnostic

(OBD)

Repair Manual, Electrical Equipment On

Board Diagnostic (OBD), Repair Group 01.

VAS 5051/5052 Vehicle Diagnostic Testing

and Information System in mode "Guided Fault
Finding"

Instrument cluster

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90-3

On Board Diagnostic (OBD),
function

The instrument cluster is controlled by an

internal microprocessor with On Board
Diagnostic (OBD) capability. If malfunctions
occur in monitored sensors and
components, Diagnostic Trouble Codes
(DTC) will be stored in memory.

If OBD recognizes instrument cluster

malfunctions related to the:

odometer

distance impulse number (K number)

speedometer calibration

the trip odometer display will change to

show "dEF.".

In this case, replace speedometer

Page

90-8

.

Other malfunctions recognized by OBD will

not cause the trip odometer display to
change as described above.

However, before performing any

troubleshooting or inspection, always begin
by checking for DTCs using the On Board
Diagnostic (OBD) program. DTCs stored in
memory are retrieved/checked with VAG
1551 / 1552 Scan Tools (ST) or VAS 5051 /
5052 Diagnostic Testing and Information
System

Repair Manual, Electrical Equipment On

Board Diagnostic (OBD), Repair Group 01.

or

VAS 5051/5052 Vehicle Diagnostic

Testing and Information System in mode
"Guided Fault Finding"

Instrument cluster

13/2/2005