engine AUDI A4 1998 B5 / 1.G Instrument Cluster OBD From Model Year 2000 Workshop Manual

01-93
Diagnostic Trouble Code (DTC) table for instrument cluster

Notes:

The following table lists all malfunctions that can be recognized by the instrument cluster and printed out by the VAG1551
scan tool. The malfunctions are listed in order according to their 5-digit numbers.
DTC numbers appear only on the print-out.
Before replacing a component shown as faulty, check the wiring and connections to the component as well as the Ground
(GND) connections according to wiring diagram.
After repairs and function test of the system, DTC memory must always be checked again using the VAG1551 scan tool
and erased.
DTC memory stores all static and sporadic malfunctions: If a malfunction occurs and persists for at least 2 seconds, it is
identified as a static malfunction (outside temperature malfunction at least 60 seconds, coolant temperature sensor only
after at least 30 minutes with engine running). If a malfunction does not occur again, it is registered as sporadic. "/SP" will
appear at right on scan tool display.
When the ignition is switched on, all existing malfunctions are automatically re-classified as sporadic malfunctions and will
only register as static malfunctions if they still occur after testing.
Sporadic malfunctions which no longer occur during 50 driving cycles (ignition on at least 5 minutes, vehicle speed 30
km/h) are erased automatically.
Pa
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01-95

VAG 1551 scan tool
display Possible causes
Corrective action
00771
Sender for fuel gauge -G-

Open circuit/short
circuit to B+
Short circuit to Ground
Open circuit or short circuit between sender for fuel
gauge -G- (Front Wheel Drive/All Wheel Drive) and
instrument cluster
Sender for fuel gauge -G- (Front Wheel Drive/All
Wheel Drive) is faulty - Locate malfunction using wiring
diagram
- Repair open circuit
- - Replace Sender for fuel gauge -
G- (Front Wheel Drive/All Wheel
Drive)
00779
Outside air temperature
sensor -G17-

Open circuit/short
circuit to B+
Short circuit to Ground
Open circuit or short circuit
Outside air temperature sensor -G17- faulty - Locate malfunction using wiring
diagram
- Repair open circuit
- Replace outside air temperature
sensor -G17-
01039
Engine Coolant
Temperature (ECT) sensor
-G2-

Open circuit/short
circuit to B+
Short circuit to Ground
Open circuit or short circuit between Engine Coolant
Temperature (ECT) sensor -G2- and instrument
cluster
Engine Coolant Temperature (ECT) sensor -G2-
faulty - Locate malfunction using wiring
diagram
- Repair open circuit
- Replace Engine Coolant
Temperature (ECT) sensor -G2-
Pa
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01-98

VAG 1551 scan tool
display Possible causes
Corrective action
01312
Powertrain data-BUS

faulty
Open circuit or short circuit to a control module in
powertrain data-BUS
A control module in the powertrain data-BUS is incorrect,
that is, control module does not support CAN
A control module that supports CAN is not indicated with a
"1" in measuring value block Page 01
-129
.
During adaptation of the instrument cluster, a control
module that supports CAN was not concurrently adapted - Locate malfunction using wiring
diagram
- Repair open circuit
- Replace incorrect control module
with a control module that supports
CAN
- Select adaptation channel 60 and
input the correct adaptation value
Page 01
-183
.
01314
Engine Control
Module (ECM)

no communication
Open circuit or short circuit
Incorrect control module, that is, control module does not
support CAN
A control module that supports CAN is not indicated with a
"1" in measuring value block Page 01
-129
If Engine
Control Module (ECM) is not displayed with "1"
Adaptation for the instrument cluster was not performed
properly - Locate malfunction using wiring
diagram
- Repair open circuit
- Replace control module with a
control module that supports CAN
- Select adaptation channel 60 and
input the correct adaptation value
Page 01
-183
.
Pa
ge 23 of 99 Instrument cluster with lon
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01-101

Output Diagnostic Test Mode (scan tool
function 03)


Notes:

Output Diagnostic Test Mode is only possible
when vehicle is stationary and engine is not
running!
If malfunctions are found during output
Diagnostic Test Mode, determine cause of
malfunction and replace instrument cluster if
necessary.

During the "output Diagnostic Test Mode"
function, all actuators that are installed in the
instrument cluster and coded are activated in
sequence.
There is also a simultaneous parallel sweep
through the indicator range of all analog display
instruments (Engine Coolant Temperature
(ECT) gauge, tachometer, speedometer, fuel
gauge)
Activation of warning lamps
Activation of seat belt warning light

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01-103
The following tests are performed
simultaneously:

Sweep of coolant temperature needle through
entire display range
Sweep of tachometer needle through entire
display range
Sweep of speedometer needle through entire
display range
Sweep of fuel gauge needle through entire
display range
After sweep of display ranges, the following fixed
values are displayed:

Engine Coolant Temperature (ECT)
gauge:
1/2
Tachometer: 3000 RPM

Speedometer: 62 MPH
Fuel gauge:
1/2

Note:
Switching ignition on and off will stop any needle
Pa
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01-110

Code Control Module (scan tool function
07)

Using this function, the instrument cluster can be
coded as follows:
Options
Country versions
Number of cylinders
Engine versions

Notes:
Coding adjusts the various combination possibilities of the on board computer according
to engine type, cylinder count and country
version.
Only the appropriate combinations for the Audi
A4 or Audi S4 are mentioned in the coding
table.
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01-111

Initiating coding Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -7-. This selects "Code Control Module", function
07.
- Press -Q- button to confirm input.
Rapid data transfer
Q
07 Code control module

Indicated on display
- Press -Q- button to confirm input.
Code control moduleInput code number XXXXX
(0-32000
)

Indicated on display:
- Input code number using coding table Page 01
-112
. Example:
02242
02 Seat belt warning active
2 Country version US
4 4-cylinder
2 gas engine
Code control module
Q
Input code number 02242
(0-32000
)

Indicated on display:
- Press -Q- button to confirm input.
8D0920830... B5-INST. Clstr. M73 D08 Coding 02242
WSC 06812

Indicated on display:
-
Press button.
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01-113

X Cylinder count
4
6 4-cylinder
6-cylinder
X Engine versions
0
2
4 TDI-engine
gas engine
Turbo-engine

Notes:

Coding can be modified to allow for various
combinations of optional equipment, depending
on what is installed in the vehicle.
If vehicle is equipped with more than one item
of optional equipment and/or transmission
variant that needs to be coded, the overall
coding will be the total of the individual coding
numbers.

Example:
Seat belt warning active and navigation I 02
+ 16 = 18
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01-115

Display group overview:

Display group
number Indicated on display
001 1 = Speed
2 = Engine RPM
3 = Oil pressure switch
4 = Time
002 1 = Trip odometer
2 = Fuel gauge
3 = Tank sensor
4 = Outside air
temperature
003 1 = Coolant temperature
010 1 = Channel 30
2 = Adaptation tank
sensor
3 = Channel 9
4 = Trip odometer
011 1 = Channel 4
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01-117

Display group
number Indicated on display
050 1 = Trip odometer
2 = Engine RPM
3 = Oil temperature
4 = Coolant temperature
125 1 = Engine
2 = Transmission
3 = ABS
4 = ADR
126 1 = A/C
130 1 = Tire pressure
2 = Auxiliary heater
3 = Unassigned
4 = Parking assistance
140 1 = Radio
2 = Telephone
3 = Navigation
Pa
ge 48 of 99 Instrument cluster with lon
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