On Board Diagnostic (OBD) Audi A8 D3

General information

The instrument cluster contains an electronic speedometer, tachometer, liquid crystal (LCD) displays for odometer, trip odometer, digital clock with date, as well as analog coolant temperature and fuel level gauges. Control and warning lamps are situated within the speedometer and tachometer faces. An LCD gear indicator display is included.

A "Driver's Information System" LCD is located between the tachometer and speedometer. Displayed information includes an auto check system, outside air temperature, automatic transmission range, radio frequency and selectable trip computer functions.

The driver information system contains a selection menu. This is operated via a function selection switch in the center console with the functions

1. Turn knob toward left. Selection arrow moves downward
2. Turn knob toward right. Selection arrow moves upward
3. Press knob. Confirm selection
4. Additional information on the selection menu See Audi A8 Owners Manual

The optional Navigation system display is also included in the Driver's Information System (where applicable).

The instrument cluster is equipped with a adaptable Service Reminder Indicator (SRI), i.e. the instrument cluster evaluates various service requirements of the vehicle based on input quantities like, for example, driveability or oil consumption.

The speedometer contains an LCD display for the odometer and trip recorder.

Brightness of the instrument cluster lighting is automatically regulated based on the brightness of surrounding light. The control range of the automatic brightness control can be adjusted using the plus and minus buttons.

See Audi A8 Owner's Manual.

The instrument cluster is controlled by a microprocessor and has extensive On Board Diagnostic (OBD) capabilities. If malfunctions occur in any of the system components, corresponding Diagnostic Trouble Codes (DTC) are stored in the DTC memory of the instrument cluster. These can then be identified using the VAG 1551 or VAG1552 Scan Tool (ST).

Note. The description in this repair manual refers only to the VAG 1551 Scan Tool (ST).

Malfunction message "dEF" on trip recorder display

If the control module in the instrument cluster detects a malfunction in its permanent memory, the letters "dEF" will appear on the trip recorder display.

1. If "dEF" is indicated on display, replace instrument cluster. See «INSTRUMENT CLUSTER, REMOVING AND INSTALLING»(/audi/a8/d3-2002-2005/remont/gauges-instrument-panels/#instruments__instrument-cluster-removing-and-installing) .

Notes for replacing instrument cluster

1. Instrument cluster must not be disassembled.
2. If necessary, instrument cluster should be replaced through the exchange loop.
3. Fill out a damage report form and return together with malfunctioning instrument cluster.
4. Malfunctioning units must always be returned in original packaging.
5. The odometer and the Service Reminder Indicator (SRI) on the replacement instrument cluster can be adapted using the VAG 1551 Scan Tool (ST). See «ADAPTATION (FUNCTION 10)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-function-10) .

Additional information

1. Electrical Wiring Diagrams
2. Service tools handbook
3. Replacement parts catalog

Safety precautions

If the use of test equipment is required during test drive, note the following

To reduce the risk of personal injury and/or damage of electric and electronic components, always observe the following

1. Always switch ignition off before connecting or disconnecting test/measurement tools.
2. It is possible that the control module will recognize a malfunction and store a DTC during some tests. After completing all tests and repairs, DTC memory should therefore be checked and erased if necessary.
3. Always switch ignition off before disconnecting or connecting battery. Failure to do so may damage the control module.

Test requirements

1. Check fuses according to wiring diagram
2. Always check coding of instrument cluster according to code table. See «CODING TABLE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
3. Connect VAS 5051 tester or VAG 1551 scan tool. See «VAS 5051 TESTER OR VAG 1551 SCAN TOOL, CONNECTING AND SELECTING FUNCTIONS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
4. Switch on ignition

Note. If nothing is indicated on display, check voltage supply for VAG 1551 scan tool according to wiring diagram. Additional instructions can be called up via the HELP button on the scan tool. The --> button is used for advancing through the program sequence. An incorrect entry can be canceled using the -C- button. Function 00 "Automatic test sequence" can be performed in operating mode 1 "Rapid data transfer." This automatically checks all control modules installed in the vehicle.

1. Switch on ignition
2. Switch printer on via the PRINT button (indicator lamp in button lights up).
3. Press button -1- to select "Rapid data transfer" operating mode 1.

Indicated on display

Scheme 1

Address word: 17

1. Press buttons -1- and -7-.

Indicated on display

Scheme 2

1. Press -Q- button to confirm input.

Indicated on display (example only): after approx. 5 seconds

Scheme 3

1. 4D0919035AD: Part number of instrument cluster
2. D2-INSTRUMENT CLUSTER: component marking
3. VDO: Manufacturer's code
4. D19: Software version of instrument cluster
5. Coding 02283: Coding of instrument cluster
6. WSC 06812: dealership number

Note. Check coding according to code table. See Coding table .

1. Press --> button.

Indicated on display (example only)

Scheme 4

1. WAUZZZ4DZYN000126: 17 digit VIN (Vehicle Identification Number)
2. AUZ7Z0W0801181: 14 digit identification number of control module for anti-theft immobilizer

1. Press --> button.

If one of these messages is displayed, perform trouble shooting according to troubleshooting diagnostic.

Scheme 5

Indicated on display

Scheme 6

1. Pressing the HELP button will print out an overview of all of the possible functions.

The following functions are possible

02 - Check DTC Memory. See CHECK DTC MEMORY (FUNCTION 02) .

03 - Output Diagnostic Test Mode. See OUTPUT DIAGNOSTIC TEST MODE (DTM) (FUNCTION 03) .

05 - Erase DTC Memory. See ERASE DTC MEMORY (FUNCTION 05) .

06 - End Output. See END OUTPUT (FUNCTION 06) .

07 - Code Control Module. See CODE CONTROL MODULE (FUNCTION 07) .

08 - Read Measuring Value Block. See READ MEASURING VALUE BLOCK (FUNCTION 07) .

10 - Adaptation. See ADAPTATION (FUNCTION 10) .

Check DTC Memory (function 02)

Note. The displayed DTC information is updated only when initiating OBD or with "Erase DTC Memory" function 05.

1. Switch printer on via the PRINT button (indicator lamp in button lights up).

Indicated on display

Scheme 7

1. Press buttons -0- and -2- to select "Check DTC Memory" function 02.

Indicated on display

Scheme 8

1. Press -Q- button to confirm input.

The number of stored malfunctions appears in the display.

Scheme 9

1. The stored malfunctions are displayed and printed out one after the other.

1. Check print-out against DTC table and repair all malfunctions as necessary. See «DIAGNOSTIC TROUBLE CODE (DTC) TABLE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__diagnostic-trouble-code-dtc-table) .

If "No DTC recognized" is displayed, the program will return to "Select function XX" after the --> button is pressed.

Scheme 10

Indicated on display

Scheme 11

If something else is displayed

See Operating instructions of Scan Tool (ST).

1. End Output (function 06). See «END OUTPUT (FUNCTION 06)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__end-output-function-06) .
2. Switch off ignition and disconnect diagnostic connector.

Diagnostic Trouble Code (DTC) table

Note. The following table lists all malfunctions that can be recognized by the instrument cluster and printed out by the VAG 1551 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 VAG 1551 scan tool and erased. DTC memory records 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. "ISP" 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 after 50 driving cycles (ignition on at least 5 minutes, vehicle speed above 30 km/h) are erased automatically.

Scheme 12

Note. In the previous graphic refer to: AUTOMATIC CLIMATE CONTROL SYSTEM, ON BOARD DIAGNOSTIC (OBD) for A/C system OBD.

Scheme 13

Scheme 14

Scheme 15

Note. In the previous graphic refer to: MEASURING VALUE BLOCK 140 for control module is not displayed and is not indicated with a "1" in measuring value block ADAPTATION VALUE for inputting the correct adaptation value

Scheme 16

Note. In the previous graphic refer to: MEASURING VALUE BLOCK 140 for control module is not indicated with a "1" in measuring value block. ADAPATATION VALUE for inputting the correct adaptation value DATA EXCHANGE BETWEEN CONTROL MODULES, CHECKING for checking data exchange

Scheme 17

Note. In the previous graphic refer to: MEASURING VALUE BLOCK 125 for CAN capable control module and Engine Control Module is not indicated with a "1" in the measuring value block ADAPTATION VALUE for inputting the correct adaptation value

Scheme 18

Note. In the previous graphic refer to: MEASURING VALUE BLOCK 125 for TCM is not indicated with a "1" in the measuring value block MEASURING VALUE BLOCK 126 for Climatronic control module is not indicated with a "1" in the measuring value block ADAPTATION VALUE for inputting the correct adaptation value

Scheme 19

Note. In the previous graphic refer to: MEASURING VALUE BLOCK 130 for control module is not indicated with a "1" in measuring value block ADAPTATION VALUE for inputting the correct adaptation value. DATA EXCHANGE BETWEEN CONTROL MODULES, CHECKING for checking data exchange.

Scheme 20

Note. In the previous graphic refer to: INSTRUMENT CLUSTER, REMOVING AND INSTALLING for replacing instrument cluster.

Output Diagnostic Test Mode (DTM) (function 03)

Note. Output Diagnostic Test Mode is only possible when vehicle is stationary and engine is not running! On board computer should be activated before initiating output Diagnostic Test Mode. If malfunctions are found during output Diagnostic Test Mode, determine cause of malfunction and replace instrument cluster if necessary.

During "output Diagnostic Test Mode" function, all actuators that are installed in the instrument cluster and coded are activated in sequence

1. Simultaneous parallel sweep through indication range of all analog display instruments (Engine Coolant Temperature (ECT) gauge, tachometer, speedometer, fuel gauge)
2. Activation of warning lamps
3. Activation of seat belt warning light
4. Activation of chime
5. Segment test of driver information display, of LCD clock/date indicator and LCD odometer
6. Test of instrument cluster lighting, including dimmer

Initiating output Diagnostic Test Mode

Indicated on display

Scheme 21

1. Press buttons -0- and -3- to select "output Diagnostic Test Mode" function 3.

Indicated on display

Scheme 22

1. Press -Q- button to confirm input: Output Diagnostic Test Mode for analog indicators is initiated immediately.

Indicated on display

Scheme 23

The following tests are performed simultaneously

1. Sweep of coolant temperature needle through entire display range
2. Sweep of tachometer needle through entire display range
3. Sweep of speedometer needle through entire display range
4. Sweep of fuel gauge needle through entire display range

After sweep of display ranges, the following fixed values are displayed

FIXED VALUES DISPLAY

Note. Switching ignition on and off will abort any needle sweep that has been initiated.

1. Press --> button.

Indicated on display

Scheme 24

All lamps are switched on that are activated by the processor.

1. Press --> button.

Indicated on display

Scheme 25

Seat belt warning light is activated.

Note. Depending on options/version, the seat belt warning light may be activated by the control module coding, i.e. if this actuator test is omitted, the warning light is not active.

1. Press --> button.

Indicated on display

Scheme 26

Chime is activated and sounds the entire time.

1. Press --> button.

Indicated on display

Scheme 27

All display points of the driver information display, the LCD clock/date indicator and the LCD odometer are activated.

1. Press --> button.

Indicated on display

Scheme 28

Instrument cluster illumination is automatically set twice to bright and dark and then switched to maximum illumination (bright).

1. Press --> button.

Indicated on display

Scheme 29

1. Press --> button to end output Diagnostic Test Mode.

The tester returns to the "Select function" mode.

Indicated on display

Erase DTC Memory (function 05)

Note. If DTC memory cannot be erased, check DTC memory again and repair malfunction.

Requirements

1. DTC memory checked. See «CHECK DTC MEMORY (FUNCTION 02)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__check-dtc-memory-function-02) .
2. All malfunctions repaired

After successful DTC memory check

Indicated on display

Scheme 30

1. Press buttons -0- and -5- to select "Erase DTC Memory" function 05.

Indicated on display

Scheme 31

1. Press -Q- button to confirm input.

Indicated on display

Scheme 32

DTC memory is erased.

1. Press --> button.

Indicated on display

Scheme 33

Note. Test sequence is faulty if this message is displayed. Test sequence is faulty if this message is displayed.

Follow test sequence exactly: first check DTC memory, repair malfunction(s) if necessary, then erase.

End Output (function 06)

Indicated on display

Scheme 34

1. Press buttons -0- and -6- to select "End Output" function 06.

Indicated on display

Scheme 35

1. Press -Q- button to confirm input.

Indicated on display

Scheme 36

1. Switch off ignition.
2. Disconnect diagnostic connection for the VAG 1551 scan tool.

Code Control Module (function 07)

Using this function, the instrument cluster can be coded as follows

1. Optional equipment
2. Country versions
3. Cylinder count
4. Engine versions

Note. Coding adjusts the various combination possibilities of the on board computer according to engine type, cylinder count and country version. The code table lists only those combinations applicable to the Audi A8.

Initiating coding

Indicated on display

Scheme 37

1. Press buttons -0- and -7- to select "Code Control Module" function 07.
2. Press -Q- button to confirm input.

Indicated on display

Scheme 38

1. Press -Q- button to confirm input.

Indicated on display

Scheme 39

1. Enter code number using coding table. See «CODING TABLE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

INSTRUMENT CLUSTER CODING EXAMPLE: 02283

Indicated on display (example only)

Scheme 40

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 41

1. Press --> button.

Indicated on display

Scheme 42

1. Press buttons -0- and -6-.

Indicated on display

Scheme 43

1. Press -Q- button to confirm input.

Scheme 44

Initiating "Read Measuring Value Block"

Indicated on display

Scheme 45

1. Press buttons -0- and -8- to select "Read Measuring Value Block" function 08.
2. Press -Q- button to confirm input.

Indicated on display

Scheme 46

1. Press -Q- button to confirm input.

Indicated on display

Scheme 47

1. Enter display group number from table (See «DISPLAY GROUP OVERVIEW»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__display-group-overview) ) and press -Q- button to confirm input.

The selected measuring value block is now displayed in standard form.

Display group overview

DISPLAY GROUP OVERVIEW 001-011

DISPLAY GROUP OVERVIEW 012-015

DISPLAY GROUP OVERVIEW 050-140

Note. For an instrument cluster replacement, data from display groups 10 - 15 must be printed out. Measuring value blocks 125 and 126 indicate the participants in the power train data-BUS. Measuring value block 130 indicates the participants in the comfort system databus. Measuring value block 140 indicates the participants in the information data-BUS. Display will always indicate the actual values obtained from the sensors. The values which appear on the instrument cluster are modified and may be different. If the actual engine coolant temperature is between 80° C and 100° C, instrument cluster will always show 90° C.

Scheme 48

Scheme 49

Scheme 50

Scheme 51

Note. If the value "128" in display field 2 was changed due to a customer complaint, the changed value must be transferred when replacing instrument cluster.

Scheme 52

Note. If the value "100" in display field 4 was changed due to a customer complaint, the changed value must be transferred when replacing instrument cluster.

Scheme 53

Scheme 54

Scheme 55

Scheme 56

Scheme 57

Scheme 58

Scheme 59

Scheme 60

Scheme 61

Adaptation (function 10)

Individual functions are called up by entering the appropriate adaptation channel numbers (Listed in the adaptation table. See ADAPTATION TABLE .)

Note. Using measuring value blocks 10, 11, 12 and 15, the values that need to be transferred to the new instrument cluster can be read out before replacement. Adaptation channels 42 - 44 (see measuring value blocks 13 and 14) do not need to be transferred when replacing instrument cluster, because they are adjusted by the factory for each new instrument cluster.

Adaptation table

INSTRUMENT CLUSTER ADAPTATION FUNCTIONS

Initiating "Adaptation" function 10

Indicated on display

Scheme 62

1. Press buttons -1- and -0- to select "Adaptation" function 10.
2. Press -Q- button to confirm input.

Indicated on display

Scheme 63

1. Press -Q- button to confirm input.

Indicated on display

Scheme 64

1. Enter desired adaptation channel. See «ADAPTATION TABLE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-table) .
2. Press -Q- button to confirm input.

Note. After changing an adaptation value or ending an adaptation channel, "Adaptation" function 10 must be performed again before selecting another adaptation channel.

Resetting SRI after service

Indicated on display

Scheme 65

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 66

1. Press -Q- button to confirm input.

Indicated on display

Scheme 67

1. Press button -0- and -2-.
2. Press -Q- button to confirm input.

Note. The Service Reminder Indicator (SRI) reminds the driver when service becomes necessary. Indicator is in center display. Service reminder appears 1 month or 1200 miles before service limit is reached. At intervals of 100 miles. Example for display: After a total driving distance of 7000 miles, "SERVICE IN 1000 miles" is indicated. The remaining distance to service can be checked via the menu in center display. When a service event arrives, the text information appears in the center display for 5 seconds when ignition is switched on. It is shown after the note for automatic transmission and a target input for navigation (if applicable). Indicated: "SERVICE!." The currently valid specifications can be found in the "Maintenance" Repair Manual. Software version of instrument cluster. See ON BOARD DIAGNOSTIC (OBD) OF INSTRUMENT CLUSTER, INITIATING .

Indicated on display (example only): Service event is indicated

Scheme 68

1 - means service is active, e.g. "SERVICE!" is being displayed in the instrument cluster.

Note. Only reset SRI via direct input.

1. Press --> button.

Indicated on display

Scheme 69

Service event is reset via the following adaptation values

SERVICE EVENT RESET ADAPTATION VALUES

1. Enter the appropriate adaptation value (00000) via the keypad to erase the service.
2. Press -0- button five times.

Indicated on display (example only)

Scheme 70

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 71

0 - means service is reset, e.g. after confirming with the -Q- button, "SERVICE IN 8000 miles" is displayed in the instrument cluster.

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 72

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 73

1. Conclude resetting of the SRI with the --> button.

Adaptation of fuel gauge

Indicated on display

Scheme 74

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 75

1. Press -Q- button to confirm input.

Indicated on display

Scheme 76

1. Press buttons -0- and -3-.
2. Press -Q- button to confirm input.

Note. Adaptation only for vehicles with on board computer. Value entered must be between 85% and 115%. Value must be entered in steps of 5%. If the value "100" was changed due to a customer complaint, the changed value must be transferred when replacing instrument cluster.

Indicated on display

Scheme 77

1. Press --> button.

Note. Correction of fuel gauge is only possible via direct input.

Indicated on display

Scheme 78

1. Input desired correction value via scan tool keypad, fill initial positions with "0."

Example

Desired input value: 90%

Keypad input: 00090

Indicated on display (example only)

Scheme 79

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 80

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 81

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 82

1. Conclude adaptation of the fuel gauge by pressing the --> button.

Indicated on display

Scheme 83

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 84

1. Press -Q- button to confirm input.

Note. For incorrect input, tester switches to function mode.

Indicated on display

Scheme 85

1. Press --> button.
2. Select "Adaptation" function 10 again and select adaptation channel 03.
3. Perform adaptation of fuel gauge again.

Language version of driver information monitor

Indicated on display

Scheme 86

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 87

1. Press -Q- button to confirm input.

Indicated on display

Scheme 88

1. Press buttons -0- and -4-.
2. Press -Q- button to confirm input.

Indicated on display

Scheme 89

Note. Display indicates only the last digit of the five digit language version code, e.g. 1 for German. For input of an incorrect value, "Adaptation" function is terminated and "Adaptation" function 10 must be initiated again. Code can now be entered via the scan tool keypad in steps or via direct input.

LANGUAGE CODING TABLE

Input in steps

1. Code can be decreased via button 1 and increased via button 3, for example, to 2 for language version English.

Indicated on display (example only)

Scheme 90

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 91

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 92

1. Conclude adaptation of language version by pressing the --> button.

Direct input

Indicated on display (example only)

Scheme 93

1. Press --> button.

Indicated on display (example only)

Scheme 94

1. Input desired five digit code via keypad. See «LANGUAGE CODING TABLE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

Example

Coding: 2 (English)

Input value: 00002

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 95

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 96

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 97

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 98

1. Conclude adaptation of language version by pressing the --> button.

Odometer display

This function is used to adapt the odometer after the instrument cluster is replaced.

Note. Adaptation can only be performed on an instrument cluster with an odometer reading of not more than 62 miles. Adaptation can only be performed once for each instrument cluster. Only higher adaptation values can be entered (more than 62 miles). If an incorrect value is entered and confirmed, it is not possible to change it. If this happens, the instrument cluster must be replaced. In countries where speedometers are calibrated in miles, adaptation can be performed in miles. Observe notes when replacing instrument cluster. See INPUT VALUES FOR REPLACING INSTRUMENT CLUSTER .

Indicated on display

Scheme 99

1. Press buttons -1- and -1- to select "Login-Procedure" function 11.

Indicated on display

Scheme 100

1. Press -Q- button to confirm input.

Indicated on display

Scheme 101

1. Input code number 13861.

Indicated on display

Scheme 102

1. Press -Q- button to confirm input.

Indicated on display

Scheme 103

1. Press buttons -1- and -0-.

Indicated on display

Scheme 104

1. Press -Q- button to confirm input.

Indicated on display

Scheme 105

1. Press buttons -0- and -9-.
2. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 106

Note. For the VAG 1551, it is only possible to input values via direct input.

1. Press the --> button to continue program sequence.

Indicated on display (example only)

Scheme 107

1. Input adaptation value via keypad.

Example

Mileage = 89627

0 8 9 6 3

Scheme 108

Indicated on display (example only)

Scheme 109

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 110

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 111

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 112

1. End adaptation of odometer by pressing the --> button.

Adaptation of auxiliary heater

Indicated on display (example only)

Scheme 113

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 114

1. Press -Q- button to confirm input.

Indicated on display

Scheme 115

Scheme 116

1. Press -1- and -8-.
2. Press -Q- button to confirm input.
3. Indicated on display (example only): Adaptation value is indicated, here, for example 0.

Note. Adaptation value "0" is input if auxiliary heater is not installed. Adaptation value "1" is input if an auxiliary heater is installed that is independent from engine condition (running or not). Adaptation value "10" is input if an auxiliary heater is installed that is switched off when engine is not running.

Scheme 117

1. Press --> button.
2. Indicated on display (example only)
3. Input adaptation value via keypad, fill initial positions with "0", e.g. 00001.
4. Indicated on display (example only)
5. Press -Q- button to confirm input. Indicated on display (example only)
6. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 118

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 119

1. End adaptation of the auxiliary heater by pressing the --> button.

Adaptation of fuel gauge sender resistance range

This function is used to adjust the resistance range for the fuel gauge sender in order to compensate for any misalignment of the fuel gauge sender.

Indicated on display

Scheme 120

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 121

1. Press -Q- button to confirm input

Indicated on display

Scheme 122

1. Press buttons 3- and -0-.
2. Press -Q- button to confirm input.

Indicated on display (example only): Adaptation value is indicated, here, for example 128.

Scheme 123

Note. "128" is the adaptation value for the standard resistance range for the fuel gauge sender as set by the factory. The resistance value for the fuel gauge sender resistance range can be adjusted by +/- 8 Ohm to give an adaptation value between 120 and 136. If the value "128" was changed due to a customer complaint, the changed value must be transferred when replacing instrument cluster.

1. Press --> button.

Indicated on display (example only)

Scheme 124

1. Input desired correction value via scan tool keypad, fill initial positions with "0."

Example

Desired input value: 132

Keypad input: 00132

Indicated on display (example only)

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 125

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 126

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 127

1. End adaptation of the fuel gauge sender resistance range by pressing the --> button.

Distance driven since service

This function is used to input the distance in miles since the last service.

Indicated on display

Scheme 128

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 129

1. Press -Q- button to confirm input.

Indicated on display

Scheme 130

1. Press buttons -4- and -0-.
2. Press -Q- button to confirm input.

Indicated on display (example only): Distance in miles since last service is indicated (here for example 8 represents 800 miles)

Scheme 131

Note. Input of current specified value is only possible in units of 100 miles, indication in display also changes in 100 mile units. Observe notes when replacing instrument cluster. See INPUT VALUES FOR REPLACING INSTRUMENT CLUSTER . In countries where speedometers are calibrated in miles, adaptation can be performed in miles. It is only possible to input values via direct input using the keypad of the scan tool.

1. Press --> button.

Indicated on display (example only)

Scheme 132

1. Input desired input value via scan tool keypad, fill initial positions with "0."

Example

Desired input value: e.g. 1000 miles

Keypad input: 00010

Indicated on display (example only)

Scheme 133

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 134

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 135

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 136

1. End adaptation of distance driven since service by pressing the --> button.

Time since service

This function is used to input the time in days since the last service.

Indicated on display

Scheme 137

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 138

1. Press -Q- button to confirm input.

Indicated on display

Scheme 139

1. Press buttons -4- and -1-.
2. Press -Q- button to confirm input.

Indicated on display (example only): Time in days since last service is indicated (here for example 110 represents 110 days)

Scheme 140

Note. Input of current specified value is only possible in units of one day, indication in display also changes in units of one day. Observe notes when replacing instrument cluster. See INPUT VALUES FOR REPLACING INSTRUMENT CLUSTER . It is only possible to input values via direct input using the keypad of the scan tool.

1. Press --> button.

Indicated on display (example only)

Scheme 141

1. Input desired input value via scan tool keypad, fill initial positions with "0."

Example

Desired input value: e.g. 200 days

Keypad input: 00200

Indicated on display (example only)

Scheme 142

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 143

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 144

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 145

1. End adaptation of time since service by pressing the --> button.

Minimum mileage performance

This function is used to set a fixed minimum mileage performance in the instrument cluster for the SRI.

Indicated on display

Scheme 146

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 147

1. Press -Q- button to confirm input.

Indicated on display

Scheme 148

1. Press buttons -4- and -2-.
2. Press -Q- button to confirm input.

Indicated on display (example only): Factory adjusted value for the minimum mileage performance (in miles) until next service is indicated (here for example 8 represents 8000 miles)

Scheme 149

Note. The currently valid specifications can be found in the "Maintenance" book. Input of current specified value is only possible in units of 1000, indication in display also changes in 1000 units. In countries where speedometers are calibrated in miles, adaptation can be performed in miles. When replacing instrument cluster, this value is already adjusted. It is only possible to input values via direct input using the keypad of the scan tool. If incorrect value is input, the "Adaptation" function is terminated and must be re-initiated.

1. Press --> button.

Indicated on display (example only)

Scheme 150

1. Input specified value via keypad, fill initial positions with "0."

Specification: 8000

Input value: 00008

Indicated on display (example only)

Scheme 151

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 152

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 153

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 154

1. End adaptation of the minimum mileage performance by pressing the --> button.

Maximum mileage performance

This function is used to set a fixed maximum mileage performance in the instrument cluster for the SRI.

Indicated on display

Scheme 155

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 156

1. Press -Q- button to confirm input.

Indicated on display

Scheme 157

1. Press buttons -4- and -3-.
2. Press -Q- button to confirm input.

Indicated on display (example only): Factory adjusted value for the maximum mileage performance (in miles) until next service is indicated (here for example 8 represents 8000 miles)

Scheme 158

Note. The currently valid specifications can be found in the "Maintenance" book. Input of current specified value is only possible in units of 1000, indication in display also changes in 1000 units. In countries where speedometers are calibrated in miles, adaptation can be performed in miles. When replacing instrument cluster, this value is already adjusted. It is only possible to input values via direct input using the keypad of the scan tool. If incorrect value is input, the "Adaptation" function is terminated and must be re-initiated.

1. Press --> button.

Indicated on display (example only)

Scheme 159

1. Input specified value via keypad, fill initial positions with "0."

Specification: 8000

Input value: 00008

Indicated on display (example only)

Scheme 160

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 161

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 162

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 163

1. End adaptation of the maximum mileage performance by pressing the --> button.

Maximum time interval

This function is used to set a fixed maximum time in days in the instrument cluster for the SRI.

Indicated on display

Scheme 164

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 165

1. Press -Q- button to confirm input.

Indicated on display

Scheme 166

1. Press buttons 4- and -4-.
2. Press -Q- button to confirm input.

Indicated on display (example only): Factory adjusted value for the time in days until next service is indicated (here for example 365 represents 365 days).

Scheme 167

Note. The currently valid specifications can be found in the "Maintenance" book. Input of current specified value is only possible in units of one day, indication in display also changes in units of one day. When replacing instrument cluster, this value is already adjusted. It is only possible to input values via direct input using the keypad of the scan tool. If incorrect value is input, the "Adaptation" function is terminated and must be re-initiated.

1. Press --> button.

Indicated on display (example only)

Scheme 168

1. Input specified value via keypad, fill initial positions with "0."

Specification: 365 days

Input value: 00365

Indicated on display (example only)

Scheme 169

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 170

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 171

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 172

1. End adaptation of maximum time interval by pressing the --> button.

Adaptation of oil quality

Indicated on display

Scheme 173

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 174

1. Press -Q- button to confirm input.

Indicated on display

Scheme 175

1. Press buttons -4- and -5-.
2. Press -Q- button to confirm input.

Note. At the moment, USA vehicles must always be adapted with "1." Adaptation value "1" means that the maximum mileage performance must be set at 8000 miles.

Indicated on display (example only)

Scheme 176

1. Press --> button

Indicated on display (example only)

Scheme 177

1. Input specified value via keypad, fill initial positions with "0."

Specification: 1 (for USA vehicles)

Keypad input: 00001

Indicated on display (example only)

Scheme 178

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 179

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 180

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 181

1. Conclude adaptation of oil quality by pressing the --> button.

Adaptation of total consumption quantity

Indicated on display

Scheme 182

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 183

1. Press -Q- button to confirm input.

Indicated on display

Scheme 184

1. Press buttons -4- and -6-.
2. Press -Q- button to confirm input.

Note. Indicated value must be transferred when replacing instrument cluster. The value indicated in liters does not represent actual consumption, but rather a calculation value for the Service Reminder Indicator (SRI) from various engine data.

Indicated on display (example only)

Scheme 185

1. Press --> button.

Indicated on display (example only)

Scheme 186

1. Input the indicated value of the old instrument cluster into the new instrument cluster using the keypad of the scan tool, fill initial positions with "0."

Desired input value: 300 Liters

Keypad input: 00300

Indicated on display (example only)

Scheme 187

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 188

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 189

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 190

1. Conclude adaptation of total consumption quantity by pressing the --> button.

Adaptation for power train data-BUS

Note. Input the adaptation values from table. See ADAPTATION VALUE . Observe notes when replacing instrument cluster. See INPUT VALUES FOR REPLACING INSTRUMENT CLUSTER .

Indicated on display

Scheme 191

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 192

1. Press -Q- button to confirm input.

Indicated on display

Scheme 193

1. Press buttons -6- and -0-.
2. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 194

1. Press --> button.

Indicated on display (example only)

Scheme 195

1. Input desired value via scan tool keypad using table. See «Adaptation value»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-value) , fill initial positions with "0."

e.g. desired input value: 1033 for manual transmission

Keypad input: 01033

Indicated on display (example only)

Scheme 196

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 197

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 198

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 199

1. Conclude adaptation of power train data-BUS by pressing the --> button.

Adaptation value

ADAPTATION VALUE - POWER TRAIN DATA-BUS

The installed control modules that participate in the power train data-BUS (Measuring value blocks. See MEASURING VALUE BLOCK 125 and MEASURING VALUE BLOCK 126 ) are added.

Note. The instrument cluster, which is CAN capable, is not indicated in the measuring value block, but must be added anyway.

Example: Manual transmission

1. Engine + A/C + instrument cluster = 1 + 8 + 1024 = 1033

Example: Automatic transmission

1. Engine + transmission + A/C + instrument cluster = 1 + 2 + 8 + 1024 = 1035

Adaptation for comfort system databus

Note. The adaptation values of the table are input. See ADAPTATION VALUE . Observe notes when replacing instrument cluster. See INPUT VALUES FOR REPLACING INSTRUMENT CLUSTER .

Indicated on display

Scheme 200

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 201

1. Press -Q- button to confirm input.

Indicated on display

Scheme 202

1. Press buttons -6- and -1-.
2. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 203

1. Press --> button.

Indicated on display (example only)

Scheme 204

1. Input desired value via scan tool keypad using table. See «ADAPTATION VALUE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) . Fill initial positions with "0."

e.g. desired input value: 768 with tire pressure control

Keypad input: 00768

Indicated on display (example only)

Scheme 205

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 206

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 207

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 208

1. Conclude adaptation of comfort system databus by pressing the --> button.

ADAPTATION VALUE - COMFORT SYSTEM DATABUS

Installed control modules that participate in the comfort system databus for the Audi A8 are added. See MEASURING VALUE BLOCK 130 .

Note. The instrument cluster, which is CAN capable, is not indicated in the measuring value block, but must be added anyway.

Example: Tire pressure control

1. Instrument cluster + tire pressure = 256 + 512 = 768

Adaptation for information data-BUS

Note. The adaptation values of the table are input. See ADAPATATION VALUE . Observe notes when replacing instrument cluster. See INPUT VALUES FOR REPLACING INSTRUMENT CLUSTER .

Indicated on display

Scheme 209

1. Press -1- and -0- and confirm by pressing the -Q- button.

Indicated on display

Scheme 210

1. Press -Q- button to confirm input.

Indicated on display

Scheme 211

1. Press buttons -6- and -2-.
2. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 212

1. Press --> button.

Indicated on display (example only)

Scheme 213

1. Input desired value via scan tool keypad using table. See «ADAPATATION VALUE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adapatation-value) . Fill initial positions with "0."

e.g. desired input value: 5 Navigation system III (NS-Low) with radio (symphony)

Keypad input: 00005

Indicated on display (example only)

Scheme 214

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 215

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 216

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 217

1. Conclude adaptation of information data-BUS by pressing the --> button.

Adapatation value

ADAPTATION VALUE - INFORMATION DATA-BUS

Installed control modules that participate in the information system databus for the Audi A8 are added. See MEASURING VALUE BLOCK 140 .

Input values for replacing instrument cluster

The following must always be observed when replacing the instrument cluster

Note. Instrument cluster must always be coded. Note the values indicated in measuring value blocks 10 - 15 on the VAG 1551 scan tool before replacing. Adaptation channels 42 - 44 must not be transferred to the new instrument cluster. Note odometer reading before replacing and input according to instructions. In countries with speedometers calibrated in miles, adaptation of the Service Reminder Indicator (SRI) can be performed in miles.

Perform the following steps after replacing instrument cluster

1. Code Control Module. See «CODE CONTROL MODULE (FUNCTION 07)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__code-control-module-function-07) .
2. Carry out adaptation of fuel gauge. See «ADAPTATION OF FUEL GAUGE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-of-fuel-gauge) (for altered fixed value).
3. Language version of driver information display. See «LANGUAGE VERSION OF DRIVER INFORMATION MONITOR»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__language-version-of-driver-information-monitor) .
4. Adaptation of auxiliary heater. See «ADAPTATION OF AUXILIARY HEATER»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-of-auxiliary-heater) .
5. Adaptation of fuel gauge sender resistance range. See «ADAPTATION OF FUEL GAUGE SENDER RESISTANCE RANGE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-of-fuel-gauge-sender-resistance) (for altered fixed value).
6. Adaptation for distance driven since service. See «DISTANCE DRIVEN SINCE SERVICE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__distance-driven-since-service) .
7. Adaptation for time since service. See «TIME SINCE SERVICE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__time-since-service) .
8. Adaptation for oil quality. See «ADAPTATION OF OIL QUALITY»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-of-oil-quality) .
9. Adaptation for total consumption quantity. See «ADAPTATION OF TOTAL CONSUMPTION QUANTITY»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-of-total-consumption-quantity) .
10. Adaptation power train data-BUS. See «ADAPTATION FOR POWER TRAIN DATA-BUS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-for-power-train-data-bus) .
11. Adaptation power train data-BUS. See «ADAPTATION FOR COMFORT SYSTEM DATABUS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-for-comfort-system-databus) .
12. Adaptation information data-BUS. See «ADAPTATION FOR INFORMATION DATA-BUS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-for-information-data-bus) .
13. Adapting odometer. See «ODOMETER DISPLAY»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__odometer-display) .
14. Adapting immobilizer after replacing instrument cluster. See «ADAPTATION AFTER REPLACING THE INSTRUMENT CLUSTER»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-after-replacing-the-instrument-cluster) .
15. Adapting vehicle key. See «ADAPTATION OF VEHICLE KEYS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-of-vehicle-keys) .

Data exchange between control modules, checking

Note. Data exchange between individual control modules occurs via a bus system. The term "CAN-bus" refers to a system that transports and distributes data. The wire connections between the control modules, via which data is transferred, are referred to as data wires. Data is transferred to the connected control modules serially (one after the other) across the data wires.

Checking bus system

The DTC table indicated that data exchange via the bus should be checked

1. Check to be sure the multi-pin connectors of the control modules are securely connected.
2. Connect the VAS 5051 tester or VAG 1551 scan tool. See «VAS 5051 TESTER OR VAG 1551 SCAN TOOL, CONNECTING AND SELECTING FUNCTIONS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
3. Switch ignition on
4. Switch printer on via the PRINT button (indicator lamp in button lights up).
5. Press button 1 to select "Rapid data transfer" operating mode 1.

Indicated on display

Scheme 218

Note. The address word 00 initiates the automatic test sequence, i.e. it results in a DTC check on all OBD capable systems in the vehicle via rapid data transfer.

When a control module responds with its identification, the display indicates the number of stored DTCs or indicates "no malfunctions recognized."

DTCs stored in the system are indicated sequence and printed out. Then the VAG 1551 scan tool sends the next address word.

Automatic test sequence is over when the following indication appears on the display

Scheme 219

If a malfunction involving" ... databus" or" ... no communication" is indicated

1. Check whether the correct control module for this vehicle is installed (part number and coding).

If the correct control modules are installed, check the CAN bus system.

Checking a "two-line bus system"

Three or more control modules are communicating across a "two-line bus system."

1. Analyze the DTCs stored in the memories of the control modules. This analysis will help you locate the cause of the line malfunction.

Example 1

From the DTCs stored in the memories, you have determined that control module 1 is not communicating with control modules 2 and 3

Scheme 220

Scheme 221

1. Switch ignition off.
2. Disconnect the control modules connected across the bus lines and check the bus lines for an open circuit. See appropriate System Wiring Diagram article.
3. If you cannot find a malfunction in the bus lines, replace control module 1.

Example 2

From the DTCs stored in the memories, you have determined that control module 2 is not communicating with control modules 1 and 3.

Scheme 222

Scheme 223

1. Switch ignition off.
2. Disconnect the control modules connected across the bus lines and check the bus lines for an open circuit. See appropriate System Wiring Diagram article.
3. If you cannot find a malfunction in the bus lines, replace control module 2.

Example 3

Using the DTCs stored in the memories, you have determined that none of the control modules are sending or receiving signals.

1. Switch ignition off.
2. Disconnect the control modules connected across the bus lines and check the bus lines for an open circuit. See appropriate System Wiring Diagram article.

1. Check the bus lines for short circuit to B+ or Ground (GND).

If you cannot determine a cause for the malfunction, e.g. "power train data-BUS faulty", check whether one of the control modules may be responsible for the DTC

All control modules that use the CAN-bus are still disconnected. Ignition is switched off.

1. Connect one of the control modules.
2. Connect VAG 1551 scan tool. Switch ignition on, and erase the DTC memory of the control module you just connected. End scan tool output using the "End Output" function 06.
3. Switch ignition off and then on.
4. Leave ignition on for 10 seconds. Then, read the DTC memory of the control module you just connected.
5. If the DTC "power train data-BUS faulty" is displayed, replace the control module you just connected.
6. If the DTC "power train data-BUS faulty" is not displayed, connect the next control module and repeat the procedure.

All A8 from m.y. 2000 are equipped with Immobilizer Generation III.

Generation III has the same functionality as the previous version. However, in addition to the normal data exchange between the immobilizer control module and ignition key, Gen. III includes data exchange between the immobilizer control module and Engine Control Module (ECM).

Data exchange between the Immobilizer control module and ECM takes place over the vehicle CAN-Bus network.

Note. For Immobilizer III, the Engine Control Module (ECM) is actively incorporated into the evaluation and monitoring. The control module for immobilizer is integrated into the instrument cluster. For immobilizer III, the keys are marked with an inscribed "W". The code consists of a fixed code and a variable code portion.

Function

Immobilizer III consists of

1. an adapted control module for anti-theft immobilizer (integrated in instrument cluster)
2. a warning light in instrument cluster
3. an induction coil at ignition lock
4. an adapted Engine Control Module (ECM)
5. and adapted ignition keys with electronics (transponder).

The control module for anti-theft immobilizer is integrated in the instrument cluster, e.g. if control module is malfunctioning, instrument cluster must be replaced. See INSTRUMENT CLUSTER, REMOVING AND INSTALLING .

The anti-theft immobilizer is a system for enabling/locking the Engine Control Module (ECM) via the CAN wire.

The transponder code consists of a fixed code and a variable code. This is different for every start procedure and therefore acts as a copy protection for the transponder.

Every immobilizer contains a different computational rule for the variable code that remains the same for its entire service life. During adaptation of the vehicle key, the immobilizer writes this computational rule into the transponder and simultaneously learns the fixed code of the current key.

The fixed code identifies each individual key so that a key that is lost can be blocked from usage. Each time the ignition is switched on, the induction coil for immobilizer reads the transponder's fixed code and then the variable code and determines whether this key is authorized for vehicle start.

The warning lamp lights up briefly (max. 3 seconds) and then goes out when an authorized vehicle key is used.

When an unauthorized vehicle key is used or when a system malfunction occurs, the warning lamp blinks constantly during ignition "on".

The electronic anti-theft immobilizer is capable of extensive On Board Diagnostic (OBD). If malfunctions occur in any of the system components, corresponding Diagnostic Trouble Codes (DTC) are stored in the DTC memory of the anti-theft immobilizer. Malfunctions can be determined via the VAG 1551 scan tool or VAS 5051 tester.

Note. The following description refers only to the VAG 1551 tester.

Notes for use and adaptation of vehicle key

Engine will only start when an authorized vehicle key is used, i.e. on of the keys adapted to the immobilizer.

During adaptation of the vehicle keys (see ADAPTATION OF VEHICLE KEYS ), all vehicle keys, including replacement and emergency keys, must always be adapted to the immobilizer.

If new or extra vehicle keys are required, adaptation of all vehicle keys must be performed.

If adaptation cannot be performed for all vehicle keys, for example, key lost during a trip, the customer must be informed that adaptation must eventually be performed for any and all vehicle keys.

Especially when a key has been lost, all vehicle keys should be re-adapted, since this will render the lost key unauthorized for vehicle start.

If special testing equipment is required during road test, note the following

To reduce the risk of personal injury and/or damage of electric and electronic components, always observe the following

1. Always switch ignition off before connecting or disconnecting test/measurement tools.
2. It is possible that the control module will recognize a malfunction and store a DTC during some tests. After completing all tests and repairs, DTC memory should therefore be checked and erased if necessary.
3. Always switch ignition off before disconnecting or connecting battery. Failure to do so may damage electronic control modules.

If malfunctions occur in the sensors and components being monitored, they will be stored in the Diagnostic Trouble Code (DTC) memory together with an indication of the type of malfunction.

A maximum of 4 DTCs can be stored simultaneously.

Sporadic malfunctions are automatically cancelled if they are not repeated in next 50 engine starts.

Effective calendar date 03.11.2002, On Board Diagnostic of the anti-theft immobilizer system are to be carried out using either the VAS 5051 or VAS 5052 Vehicle Diagnostic Testing and Information System.

Note. Display fields in function 08 - Read Measuring Value Block are read-out vertically. While the display field contents are identical between the VAS 5051/5052 and VAG 1551, the display format is different.

Effective calendar date 03.11.2002, the immobilizer secret number is encoded for increased security. The encoded number is now 7-digits and is referred to as a "PIN" ("Personal Identification Number").

All models with anti-theft immobilizer are affected, regardless of generation.

The process to obtain the 7-digit PIN remains the same as with the 4-digit "secret number previously used - that is: request via the "Warranty Information Network" (WIN). However, WIN Administration now requires additional information from both the vehicle and Dealer in order to generate the 7-digit PIN.

The PIN is only valid on the day it is requested. Thereafter, a new PIN is required.

The 7-digit PIN can only be processed and input using either the VAS 5051 or VAS 5052 with basis CD version 3.10 and higher. VAG 1551/1552 Scan Tools are unable to process or input this number.

A correct Importer/Dealer number must reside in the VAS 5051/5052 in order to request a PIN.

The requested PIN is worthless to other Dealers.

Note. The following description and illustrations deal specifically with the VAG1551 scan tool. VAG 1552 procedures are similar, but printing is not possible.

Check Control Module Versions (function 01)

The information displayed is used in conjunction with a DTC table which has information on the possible causes for pinpointed repair steps.

Test requirements

1. All fuses OK according to wiring diagram
2. Voltage supply OK (at least 11.5 V).
3. Scan Tool VAG 1551 or VAG 1552 connected.

Note. Connecting Scan Tool. See VAS 5051 TESTER OR VAG 1551 SCAN TOOL, CONNECTING AND SELECTING FUNCTIONS . The following description applies only to Scan Tool VAG 1551.

1. Switch on ignition.
2. Switch on printer with the PRINT button (indicator lamp in button lights up).
3. Press button -1- to select operating mode 1, "Rapid data transfer".

Indicated on display

Scheme 224

1. Press buttons -1- and -7- to input "Instrument Cluster" address word 17.

Note. Because the immobilizer is integrated in the instrument cluster, the same address word must be used as for the instrument cluster.

Indicated on display

Scheme 225

1. Press -Q- button to confirm input.

Indicated on display (example only): after approx. 5 seconds

Scheme 226

1. 4D0919035AD: Part number of instrument cluster (see also replacement part program)
2. D2-INSTRUMENT CLUSTER: component marking
3. VDO: Manufacturer's code
4. D19: Software version of instrument cluster
5. Coding 16083: Coding of instrument cluster
6. WSC 06812: dealership number

1. Press --> button.

Indicated on display (example only): (example only)

Scheme 227

1. WAUZZZ4DZYN000126: 17 digit VIN (Vehicle Identification Number)
2. AUZ7Z0W0801181: 14 digit identification number of control module for anti-theft immobilizer

1. Press --> button.

If one of these messages is displayed, perform trouble shooting according to troubleshooting diagnostic.

Scheme 228

Indicated on display

Scheme 229

1. Pressing the HELP button will print out an overview of all of the possible functions.
2. Press the --> button to continue program sequence.

The following functions are possible

1. 01- Check control module version. See «CHECK CONTROL MODULE VERSIONS (FUNCTION 01)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__check-control-module-versions-function-01) .
2. 02 - Check DTC Memory. See «CHECK DTC MEMORY (FUNCTION 02)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
3. 05 - Erase DTC Memory. See «ERASE DTC MEMORY (FUNCTION 05)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
4. 06 - End Output. See «END OUTPUT (FUNCTION 06)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
5. 08 - Read Measuring Value Block. See «READ MEASURING VALUE BLOCK (FUNCTION 08)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
6. 10 - Adaptation. See «ADAPTATION (FUNCTION 10)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
7. 11 - Login procedure. See «LOGIN PROCEDURE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__login-procedure) .

Note. The displayed DTC information is updated only when initiating OBD or with "Erase DTC Memory" function 05.

1. Switch printer on via the PRINT button (indicator lamp in button lights up).

Indicated on display

Scheme 230

1. Press buttons -0- and -2-. This selects "Check DTC memory", function 02.

Indicated on display

Scheme 231

1. Press -Q- button to confirm input.

The number of stored malfunctions appears in the display.

Scheme 232

1. The stored malfunctions are displayed and printed out one after the other.

1. Check print-out against DTC table and repair all malfunctions as necessary. See «DIAGNOSTIC TROUBLE CODE (DTC) TABLE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

If "No DTC recognized" is displayed, the program will return to "Select function XX" after the --> button is pressed.

Scheme 233

Indicated on display

Scheme 234

If something else is displayed

See Operating instructions of Scan Tool (ST)

1. End Output (function 06). See «END OUTPUT (FUNCTION 06)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
2. Switch off ignition and disconnect diagnostic connector.

1. The following table lists all malfunctions that can be recognized by the anti-theft immobilizer and printed out by the VAG 1551 scan tool. The malfunctions are listed in order according to their 5-digit numbers.
2. DTCs of the instrument cluster can also be shown since the anti-theft immobilizer is integrated in the instrument cluster.
3. DTC numbers appear only on the print-out.
4. 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.
5. After repairs, DTC memory must always be checked again using the VAG 1551 scan tool and erased.
6. DTC memory records all static and sporadic malfunctions: If a malfunction occurs and persists for at least 2 seconds, it is identified as a static malfunction. If a malfunction does not occur again, it is registered as sporadic. "/SP" will appear at right on scan tool display.
7. 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.
8. Sporadic malfunctions which no longer occur after 50 driving cycles (ignition on at least 5 minutes, vehicle speed above 30 km/h) are erased automatically.

Scheme 235

Note. In the previous graphic refer to: INDUCTION COIL, REPLACING for replacing induction coil. ERASE DTC MEMORY (FUNCTION 05) for erasing DTC memory. CHECK DTC MEMORY (FUNCTION 02) for checking DTC memory again. INSTRUMENT CLUSTER, REMOVING AND INSTALLING for replacing instrument cluster ADAPTATION OF VEHICLE KEYS for re-adapting ignition keys and checking for function

Scheme 236

Note. In the previous graphic refer to: ADAPTATION OF VEHICLE KEYS for re-adapting ignition keys and checking for function ADAPTATION AFTER REPLACING THE ENGINE CONTROL MODULE (ECM) for adapting ECM.

Scheme 237

Note. In the previous graphic refer to: ADAPTATION OF VEHICLE KEYS for adapting ignition keys by inputting secret number and checking for function INSTRUMENT CLUSTER, REMOVING AND INSTALLING for replacing instrument cluster

Note. If DTC memory cannot be erased, check DTC memory again and repair malfunction.

1. DTC memory checked. See «CHECK DTC MEMORY (FUNCTION 02)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
2. All malfunctions repaired.

After successful DTC memory check

Indicated on display

Scheme 238

1. Press buttons -0- and -5-. This selects "Erase DTC memory", function 05.

Indicated on display

Scheme 239

1. Press -Q- button to confirm input.

Indicated on display

Scheme 240

DTC memory is erased.

1. Press --> button.

Indicated on display

Scheme 241

Note. Test sequence is faulty if this message is displayed. Test sequence is faulty if this message is displayed.

Follow test sequence exactly: first check DTC memory, repair malfunction(s) if necessary, then erase.

DTCs are not updated after erasing DTC memory until after ignition has been switched on and off.

Indicated on display

Scheme 242

1. Press buttons -0- and -6-. This selects "End Output", function 06.

Indicated on display

Scheme 243

1. Press -Q- button to confirm input.

Indicated on display

Scheme 244

1. Switch off ignition.
2. Disconnect harness connectors for the VAG 1551 scan tool.

Indicated on display

Scheme 245

1. Press buttons -0- and -8- to select "Read Measuring Value Block" function 08.

Indicated on display

Scheme 246

1. Press -Q- button to confirm input.

Indicated on display

Scheme 247

1. Enter display group number from table and press -Q- button to confirm input. See «DISPLAY GROUP OVERVIEW»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

The selected measuring value block is now displayed in standard form.

Scheme 248

Scheme 249

Note. In the previous graphic refer to: ANTI-THEFT IMMOBILIZER ON BOARD DIAGNOSTIC (OBD), INITIATING for re-initiating On Board Diagnostic

Scheme 250

Scheme 251

Using the adaptation function, the following changes can be made and saved.

1. Adaptation of vehicle keys. See «ADAPTATION OF VEHICLE KEYS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-of-vehicle-keys) .
2. Adaptation after replacing instrument cluster. See «ADAPTATION AFTER REPLACING THE INSTRUMENT CLUSTER»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-after-replacing-the-instrument-cluster) .
3. Adaptation after replacing Engine Control Module (ECM). See «ADAPTATION AFTER REPLACING THE ENGINE CONTROL MODULE (ECM)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-after-replacing-the-engine-control) .
4. Adaptation after replacing instrument cluster and Engine Control Module. See «ADAPTATION AFTER REPLACING THE ENGINE CONTROL MODULE (ECM)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-after-replacing-the-engine-control) .

Adaptation of vehicle keys

1. If new or additional ignition keys are required, they must be adapted to the anti-theft immobilizer.
2. All ignition keys, including those that were previously authorized, must be re-adapted.
3. Especially when a key has been lost, all vehicle keys should be re-adapted, since this will render the lost key unauthorized for vehicle start.
4. If it is not possible to adapt all keys for some reason, i.e. during a trip, the customer must have this done later at his/her local Audi dealership.
5. The number of adapted keys is indicated after selecting the adaptation function (channel 21) and also in measuring value block 022.
6. Adaptation can be interrupted using the "C" button of the VAG 1551 scan tool.
7. Once a key is adapted, it is locked and cannot be adapted to another immobilizer system.

Note. Effective calendar date 03.11.2002, the immobilizer secret number is encoded for increased security. The encoded number is now 7-digits and is referred to as a "PIN" ("Personal Identification Number"). The associated process is also new. See ANTI-THEFT IMMOBILIZER ON BOARD DIAGNOSTIC (OBD), INITIATING .

All keys available. If there are no ignition keys available, see "Procedure for lost key". See LOST KEY PROCEDURE .

1. Insert first key in ignition lock and switch on ignition.
2. Connect VAG 1551 scan tool and initiate OBD of the anti-theft immobilizer using address word "17". See «ANTI-THEFT IMMOBILIZER ON BOARD DIAGNOSTIC (OBD), INITIATING»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

After control module identification is displayed

1. Press --> button.

Indicated on display

Scheme 252

1. Perform login procedure for instrument cluster. See «LOGIN PROCEDURE, INSTRUMENT CLUSTER»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__login-procedure-instrument-cluster) .

Indicated on display

Scheme 253

1. Press buttons -1- and -0-. This selects "Adaptation", function 10.

Indicated on display

Scheme 254

1. Press -Q- button to confirm input.

Indicated on display

Scheme 255

1. Press buttons -2- and -1-. This selects the channel for adapting keys, -21-.
2. Press -Q- button to confirm input.

If displayed

Scheme 256

1. Repeat adaptation with entry of secret number.

Indicated on display (example only)

Scheme 257

The upper line indicates that 2 ignition keys are adapted to the system.

Note. The number of keys to be adapted can also be entered via button 1 (decrease number) and button 3 (increase number).

1. Press --> button.

Indicated on display

Scheme 258

1. Press the -0- button four times and then the total number of keys to be adapted, including the key that is in the ignition (e.g. 00004), max. 8 keys possible.
2. Press -Q- button to confirm input.

Indicated on display (example only): for 4 keys to be adapted

Scheme 259

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 260

Note. No single key must require more than 30 seconds during adaptation, otherwise the warning lamp will blink with a frequency of 2 Hz and adaptation must be performed again in its entirety (login procedure and adaptation).

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 261

Warning lamp in instrument cluster goes out, key in ignition is now adapted.

1. Press --> button.

Indicated on display

Scheme 262

1. Press buttons -0- and -6-. This selects "End Output", function 06.

Indicated on display

Scheme 263

1. Press -Q- button to confirm input.

Indicated on display

Scheme 264

1. Insert next key in ignition lock and switch on ignition. Warning lamp lights up when ignition is switched on and goes out after approx. one second. This key is also adapted now.
2. Repeat procedure until all keys have been adapted. After the last key, the warning light will go out approx. 2 seconds after successful adaptation and a short confirmation signal will be given (0.5 seconds light off, 0.5 seconds light on, light off).
3. During adaptation of vehicle keys, the fixed code of each key (transponder) is adapted to the immobilizer. Furthermore, the computational rule for the variable code is written into each key and locked. After that keys can only be adapted for immobilizer III if they have the correct variable code (key has already been adapted to the system) or if they have not yet been locked (replacement part key). Adapted vehicle keys can not be used in conjunction with a different immobilizer system.
4. Select "Check DTC memory", function 02. If there are no DTCs stored, then the function "Adapting keys" has been completed successfully.

Adaptation of ignition keys is automatically terminated if

1. The number of keys to be adapted has been reached.
2. The ignition is switched on using a key that is already adapted and remains switched on for more than one second (DTC stored).
3. The allotted adaptation time of 30 seconds per key, after ignition is switched on, is exceeded (DTC stored).
4. A DTC is stored during key adaptation.

Lost key procedure

1. Order replacement ignition key using lock number.
2. Adapt all vehicle keys. See «ADAPTATION OF VEHICLE KEYS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-of-vehicle-keys) .
3. For vehicles with radio-controlled operation, all radio keys must be adapted to the control module for central locking. See «WORK PROCEDURE FOR RE-ADAPTING EXISTING RADIO CONTROLLED KEYS»(/audi/a8/d3-2002-2005/remont/door-locks-anti-theft-systems/#on-board-diagnostic-obd-central-locking-system-ultrasonic-interior-monitoring__work-procedure-for-re-adapting-existing-radio-controlled) .

Determining the secret number

If the 4-digit secret number is not known or the new vehicle key fob with the secret number is not available, the secret number must be requested from the WIN system code retrieval system by supplying the 14-character immobilizer control module identification number.

The 14 digit identification number of the Engine Control Module (ECM) or control module for anti-theft immobilizer can be read out via the "Check control module version" function of On Board Diagnostic (OBD).

Note. Effective calendar date 03.11.2002, the immobilizer secret number is encoded for increased security. The encoded number is now 7-digits and is referred to as a "PIN" ("Personal Identification Number"). The associated process is also new. See ANTI-THEFT IMMOBILIZER ON BOARD DIAGNOSTIC (OBD), INITIATING .

Adaptation after replacing the instrument cluster

Note. The instrument cluster (immobilizer) is adapted to the Engine Control Module. When the instrument cluster is replaced, the new instrument cluster must be re-adapted to the Engine Control Module (ECM). After adapting the instrument cluster to the Engine Control Module, vehicle key adaptation must be performed. See ADAPTATION OF VEHICLE KEYS . Adaptation can be interrupted using the "C" button of the VAG 1551 scan tool.

1. Insert old (authorized) ignition key into ignition lock and switch on ignition.
2. If no authorized ignition keys are available, then new ignition keys must be made and be adapted following "Adaptation after replacing instrument cluster."
3. Connect VAG 1551 scan tool and initiate OBD of engine electronics using address word "01"

Indicated on display

Scheme 265

Address word for engine electronics 01

1. Press buttons -0- and -1-.

Indicated on display

Scheme 266

1. Press -Q- button to confirm input.

Indicated on display after approx. 5 seconds

Scheme 267

1. Press --> button.

Indicated on display (example only)

Scheme 268

1. WAUZZZ4DZXN002341: 17 digit VIN (Vehicle Identification Number)
2. AUZ7Z0X0590944: 14 digit identification number of Engine Control Module (ECM)

Using the 14 digit identification number of the ECM, determine the secret number via direct query of the system (like direct query of the radio code).

1. Press --> button.

Indicated on display

Scheme 269

1. Press buttons -0- and -6-. This selects "End Output", function 06.

Indicated on display

Scheme 270

1. Press -Q- button to confirm input.

Indicated on display

Scheme 271

1. Initiate On Board Diagnostic (OBD) of the immobilizer (instrument cluster).

Address word for the anti-theft immobilizer: 17

1. Press buttons -1- and -7-.

Indicated on display

Scheme 272

1. Press -Q- button to confirm input.

Indicated on display (example only): after approx. 5 seconds

Scheme 273

1. Press --> button.

Indicated on display (example only)

Scheme 274

Replacement instrument clusters already have a 14 digit identification number (this is necessary if instrument cluster and ECM are being replaced simultaneously). It is overwritten during adaptation of the instrument cluster to the Engine Control Module (ECM).

Note. If a used instrument cluster is being installed, this must first be switched free via a login procedure. See LOGIN PROCEDURE, INSTRUMENT CLUSTER . The secret number must be determined via the 14 digit identification number of the used instrument cluster. Continue as follows after successful login procedure.

1. Press --> button.

Indicated on display

Scheme 275

1. Press buttons -1- and -0-. This selects "Adaptation", function 10.

Indicated on display

Scheme 276

1. Press -Q- button to confirm input.

Indicated on display

Scheme 277

1. Press buttons -5- and -0-. This selects the channel for adaptation of immobilizer to Engine Control Module, -50-.
2. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 278

1. Press --> button.

Indicated on display (example only)

Scheme 279

1. Input the previously determined secret number, place a -0- before the 4 digit number (e.g. 01915).
2. If the secret number is entered incorrectly three times, tester display will indicate "locked 10." This locking time can also be indicated in measuring value block 24 (second position). Adaptation is now locked for 10 minutes. This time is doubled after every third consecutive incorrect attempt, up to a maximum of 255 minutes.
3. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 280

After correct entry of the secret number and following a 4 second waiting period, the vehicle's VIN is indicated on the tester display and the warning lamp in the instrument cluster lights up.

Indicated on display (example only)

Scheme 281

1. Press -Q- button to confirm VIN.

Indicated on display (example only)

Scheme 282

1. Press -Q- button.

The warning light will go out approx. 2 seconds after successful adaptation and a short confirmation signal will be given (0.5 seconds light off, 0.5 seconds light on, light off).

Indicated on display (example only)

Scheme 283

1. Press --> button.

Indicated on display

Scheme 284

Adaptation of the immobilizer to the Engine Control Module has been completed.

Now vehicle keys can be adapted to the immobilizer. See ADAPTATION OF VEHICLE KEYS .

Adaptation after replacing the Engine Control Module (ECM)

Note. Engine Control Module (ECM) is adapted to the immobilizer (instrument cluster). When the Engine Control Module (ECM) is replaced, the new ECM must be re-adapted to the immobilizer. Adaptation can be interrupted using the "C" button of the VAG 1551 scan tool.

1. Insert old (authorized) ignition key into ignition lock and switch on ignition.
2. If no authorized ignition keys are available, then new ignition keys must be made and be adapted following "Adaptation after replacing Engine Control Module (ECM)."
3. Connect VAG 1551 scan tool and initiate OBD of the anti-theft immobilizer using address word "17". See «ANTI-THEFT IMMOBILIZER ON BOARD DIAGNOSTIC (OBD), INITIATING»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

Indicated on display

Scheme 285

Address word for the anti-theft immobilizer: 17

1. Press buttons -1- and -7-.

Indicated on display

Scheme 286

1. Press -Q- button to confirm input.

Indicated on display (example only): after approx. 5 seconds

Scheme 287

1. Press --> button.

Indicated on display (example only)

Scheme 288

1. WAUZZZ4DZYN000126: 17 digit VIN (Vehicle Identification Number)
2. AUZ7Z0W0801181: 14 digit identification number of control module for anti-theft immobilizer

Using the 14 digit identification number of the control module for anti-theft immobilizer, determine the secret number via direct query of the system (like direct query of the radio code).

1. Press --> button.

Indicated on display

Scheme 289

1. Press buttons -0- and -6-. This selects "End Output", function 06.

Indicated on display

Scheme 290

1. Press -Q- button to confirm input.

Indicated on display

Scheme 291

1. Initiate On Board Diagnostic (OBD) of engine electronics.

Address word for engine electronics 01

1. Press buttons -0- and -1-.

Indicated on display

Scheme 292

1. Press -Q- button to confirm input.

Indicated on display (example only): after approx. 5 seconds

Scheme 293

1. Press --> button.

Indicated on display (example only)

Scheme 294

Note. If a used Engine Control Module (ECM) is being installed, this must first be switched free via a login procedure. See LOGIN PROCEDURE, ENGINE CONTROL MODULE (ECM) . The secret number must be determined via the 14 digit identification number of the used Engine Control Module (ECM). Continue as follows after successful login procedure.

1. Press --> button.

Indicated on display

Scheme 295

1. Press buttons -1- and -0-. This selects "Adaptation", function 10.

Indicated on display

Scheme 296

1. Press -Q- button to confirm input.

Indicated on display

Scheme 297

1. Press buttons -5- and -0-. This selects the channel for adaptation of the Engine Control Module (ECM) to the immobilizer, -50-.

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 298

1. Press --> button.

Indicated on display (example only)

Scheme 299

1. Input the previously determined secret number, place a -0- before the 4 digit number (for example, 01915). If the secret number is entered incorrectly three times, tester display will indicate "locked 10." Adaptation is now locked for 10 minutes. This time is doubled after every third consecutive incorrect attempt, up to a maximum of 255 minutes.
2. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 300

After correct entry of the secret number and following a 4 second waiting period, the vehicle's VIN is indicated on the tester display.

Indicated on display (example only)

Scheme 301

1. Press -Q- button to confirm VIN.

Indicated on display (example only)

Scheme 302

1. Press -Q- button.

Indicated on display (example only)

Scheme 303

1. Press --> button.

Indicated on display

Scheme 304

Adaptation of the Engine Control Module (ECM) to the immobilizer has been completed and the vehicle can be started.

Adaptation after replacing the instrument cluster and the Engine Control Module (ECM)

The computational rule for the variable code is written into the transponder and locked during adaptation of the vehicle key. After this, these vehicle keys cannot be adapted to another immobilizer. If the instrument cluster and Engine Control Module (ECM) are both replaced together, the new immobilizer in the instrument cluster receives a different computational rule for the variable code. During adaptation, this new computational rule will be written into the Engine Control Module (ECM) and into the vehicle keys where it is also locked.

Procedure

1. Input VIN in instrument cluster (only possible with VAS 5051 tester).
2. Perform adaptation after replacing Engine Control Module (ECM). See «ADAPTATION AFTER REPLACING THE ENGINE CONTROL MODULE (ECM)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-after-replacing-the-engine-control) .
3. Perform adaptation of vehicle keys. See «ADAPTATION OF VEHICLE KEYS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-of-vehicle-keys) .

1. Connect the VAS 5051 and enter vehicle On Board Diagnostic (OBD). Select vehicle system "17 - instrument cluster." Select diagnostic function "Transmit Vehicle Identification Number."
2. Transmit the vehicle's VIN and confirm.

Note. The following adaptations are also possible using the VAS 5051 tester.

1. Perform "Adaptation after replacing Engine Control Module (ECM)". See «ADAPTATION AFTER REPLACING THE ENGINE CONTROL MODULE (ECM)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-after-replacing-the-engine-control) .
2. Perform "Adaptation of vehicle keys". See «ADAPTATION OF VEHICLE KEYS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__adaptation-of-vehicle-keys) .

Instrument cluster, Engine Control Module (ECM) and vehicle keys are now adapted and the vehicle can be started.

Login procedure

Note. The secret number must be determined using the 14 digit identification number of the anti-theft immobilizer or Engine Control Module (ECM) by querying the system directly (like direct query of radio code). Furthermore, it is possible to obtain the secret number via the relevant distributor or importer. After the third incorrect input of the secret number, the control module for anti-theft immobilizer or Engine Control Module (ECM) will be locked. It is not possible to make another attempt for 10 minutes. During this time, the ignition must remain constantly switched on. On Board Diagnostic (OBD) must be exited using the "End Output" function 06. This time is doubled after every third consecutive incorrect attempt, up to a maximum of 255 minutes.

Note. Effective calendar date 03.11.2002, the immobilizer secret number is encoded for increased security. The encoded number is now 7-digits and is referred to as a "PIN" ("Personal Identification Number"). The associated process is also new. See ANTI-THEFT IMMOBILIZER ON BOARD DIAGNOSTIC (OBD), INITIATING .

Login Procedure, instrument cluster

Indicated on display

Scheme 305

1. Press button -1- twice. This selects the "Login procedure" function 11.

Indicated on display

Scheme 306

1. Press -Q- button to confirm input.

Indicated on display

Scheme 307

1. Input the secret number, place a -0- before the 4 digit number (e.g. 01915).
2. Press -Q- button to confirm input.

Note. Once the login procedure has been successfully completed, the warning lamp will light constantly and the immobilizer will be switched free

1. as long as the engine is running and the ignition key is inserted
2. for 45 minutes, as long as the ignition key is inserter (engine not running)
3. for 5 minutes, if ignition key is removed

Indicated on display

Scheme 308

Indicated on display

Scheme 309

Login procedure, Engine Control Module (ECM)

Indicated on display

Scheme 310

1. Press button -1- twice. This selects the "Login procedure" function 11.

Indicated on display

Scheme 311

1. Press -Q- button to confirm input.

Indicated on display

Scheme 312

1. Input the secret number, place a -0- before the 4 digit number (e.g. 01915).
2. Press -Q- button to confirm input.

Indicated on display

Scheme 313

The Engine Control Module is now switched free.

Indicated on display

Scheme 314

Emergency start function using VAG 1551

Using the emergency start function, a vehicle that has been immobilized via a locked immobilizer can be switched free and driven on its own engine power to the nearest Audi dealership.

1. Customer must prove him/herself to be an authorized vehicle user via vehicle papers and identification.
2. VAG 1551/1552 scan tool
3. Secret number available, if not, see "Determining secret number". See «LOST KEY PROCEDURE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__lost-key-procedure) .

1. Connect VAG 1551 scan tool and initiate OBD of the anti-theft immobilizer using address word "17". See «ANTI-THEFT IMMOBILIZER ON BOARD DIAGNOSTIC (OBD), INITIATING»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

After control module identification is displayed

1. Press --> button.

Indicated on display

Scheme 315

1. Perform login procedure for instrument cluster. See «Login Procedure, instrument cluster»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__login-procedure-instrument-cluster) .

Indicated on display

Scheme 316

1. Press buttons -0- and -6-. This selects "End Output", function 06.

Indicated on display

Scheme 317

1. Press -Q- button to confirm input.

Indicated on display

1. Leave ignition switched on and start engine.

Note. Once the emergency start procedure has been successfully completed, the warning lamp will light constantly and the immobilizer will be switched free

1. as long as the engine is running and the ignition key is inserted
2. for 45 minutes, as long as the ignition key is inserter (engine not running)
3. for 5 minutes, if ignition key is removed

Note. After three incorrect entries of the secret number, the immobilizer is locked. It is not possible to make another attempt for 10 minutes. During this time, the ignition must remain constantly switched on. This time is doubled after every third consecutive incorrect attempt, up to a maximum of 255 minutes. If no buttons or knobs are operated for more than 30 seconds during the input procedure, the emergency start attempt is aborted. If emergency start attempt is performed successfully, vehicle can be started within 45 minutes with the S-contact closed With S-contact open, i.e. vehicle key removed, engine can only be started within 5 minutes.

1. Electrical Wiring Diagrams
2. Service tools handbook
3. Replacement parts catalog

If special testing equipment is required during test drive, note the following

To reduce the risk of personal injury and/or damage of electric and electronic components, always observe the following.

1. Always switch ignition off before connecting or disconnecting test/measurement tools.
2. It is possible that the control module will recognize a malfunction and store a DTC during some tests. After completing all tests and repairs, DTC memory should therefore be checked and erased if necessary.
3. Always switch ignition off before disconnecting or connecting battery. Failure to do so may damage a control module.

CCS, checking

1. Connect the VAS 5051 tester or VAG 1551 scan tool. See «VAS 5051 TESTER OR VAG 1551 SCAN TOOL, CONNECTING AND SELECTING FUNCTIONS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
2. Select the control module for engine electronics using address word 01.

Note. Except for operating switches, the cruise control system does not have any of its own components. All of its functions are controlled by the Engine Control Module (ECM).

Indicated on display

Scheme 318

1. Press buttons -0- and -8-. This selects "Read measuring value block", function 08.

Indicated on display

Scheme 319

1. Press -Q- button to confirm input.

Indicated on display

Scheme 320

1. Input display group number 066 (engine must be running at idle)
2. Press -Q- button to confirm input.

The selected measuring value block is now displayed in standard form.

Scheme 321

Scheme 322

Indicated on display

Scheme 323

Check indications in display fields 2 and 4

Check of indication in display field 2

Scheme 324

TEST CONDITION FOR DISPLAY FIELD 2 - CRUISE CONTROL

If the specified value in display field 2 for "cruise control system release" (1000) is not obtained

1. Check control module identification of current Engine Control Module (ECM).

VAG 1551 scan tool display indicates control module coding, for example

Scheme 325

CONTROL MODULE CODING EXAMPLE - CRUISE CONTROL

1. If there is no "G" under component identification, cruise control must be activated first. See «CCS, activating»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__ccs-activating) .

Only for vehicles with automatic transmission

1. Road test vehicle and exceed 30 km at least once. Do not switch off engine upon completion. Leave selector lever in -2-, -3- or -D-.
2. Engage parking brake.

Note. For vehicles with automatic transmission, the voltage supply for the cruise control switch is not switched on until a speed of above 30 km/h is reached with selector lever in position -2-, -3- or -D-. The voltage supply will then be maintained at ideal, as long as a driving mode (aside from -1- or -R-) is selected.

Check of indication in display field 4

Scheme 326

Scheme 327

CRUISE CONTROL TEST CONDITIONS - DISPLAY FIELD 4

If the specified values in display field 4 are not obtained, although switch B is set to "ON" (0011)

1. Connect VAG1598/31 test box to wiring harness for Engine Control Module (ECM). See «ELECTRICAL TEST USING VAG 1598/31 TEST BOX»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__electrical-test-using-vag-159831-test) .

CCS, activating

1. Connect the VAS 5051 tester or VAG 1551 scan tool. See «VAS 5051 tester or VAG 1551 scan tool, connecting and selecting functions»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
2. Select the control module for engine electronics using address word 01.

Indicated on display

Scheme 328

1. Press button -1- twice for the "Login procedure" function and confirm input by pressing the -Q- button.

Indicated on display

Scheme 329

1. Press buttons -1-, -1-, -4-, -6- and -3- to select code number 11463. Press -Q- button to confirm input.

CCS, deactivating

1. Connect the VAS 5051 tester or VAG 1551 scan tool. See «VAS 5051 TESTER OR VAG 1551 SCAN TOOL, CONNECTING AND SELECTING FUNCTIONS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
2. Select the control module for engine electronics using address word 01.

Indicated on display

Scheme 330

1. Press button -1- twice for the "Login procedure" function and confirm input by pressing the -Q- button.

Indicated on display

Scheme 331

1. Press buttons -1-, -6-, -1-, -6- and -7- to select code number 16167. Press -Q- button to confirm input.

Electrical test using VAG 1598/31 test box

1. VAG1598/31 test box is designed so that it can be simultaneously connected to the wiring harness at the Engine Control Module (ECM) and also to the ECM itself.
2. This is advantageous because electronic engine control remains fully functional (e.g. measurement of signals with engine running) when the test box is attached.
3. Relevant test procedures note whether Engine Control Module (ECM) should also be connected to the test box or not.
4. Use the following for the test: hand held multimeter (Fluke 83 or equivalent) or the VAG1715 voltage tester and the VAG1527 diode test lamp.
5. Always use adapter cables from VAG1594 connector test kit for connecting special tools to the VAG1598/31 test box.
6. Perform adaptation of Engine Control Module (ECM) to throttle valve control module after reconnecting the Engine Control Module (ECM). See «THROTTLE VALVE CONTROL MODULE, ADAPTATION»(/audi/a8/d3-2002-2005/remont/fuel-system/#multiport-fuel-injection-mfi-42l-v8-akb-aux-ays__throttle-valve-control-module-adaptation) .

1. Switch ignition off.
2. Remove cover of protective housing for control modules.
3. Using a screwdriver, carefully pry off retaining bracket (arrow).
4. Then disengage connector from control module and disconnect.
5. Connect VAG1598/31 test box to connector of wiring harness. Ground (GND) clip at test box (not visible in illustration) must be clipped to battery minus. Relevant test procedures note whether Engine Control Module (ECM) should also be connected to the test box.
6. Perform test as described in relevant repair sequence.
7. Disconnect harness connector at cruise control switch. See «STEERING COLUMN SWITCHES, REMOVING AND INSTALLING»(/audi/a8/d3-2002-2005/remont/steering-column-switches/#lights-switches-exterior) .

Wire connection must be checked for short circuit to B+, Ground (GND) and for open circuit

1. Check wire connection according to wiring diagram. See appropriate System Wiring Diagram article.
2. Repair open circuit or short circuit if necessary.

Cruise control switch must be replaced if wire connection is OK.

The Acoustic Parking System monitors the vehicle's environment via four ultrasound sensors in the front bumper and four ultrasound sensors in the rear bumper. The acoustic gap notification is given via one chime in the front and one in the rear of the vehicle interior.

There are four ultrasound sensors built into each of the bumpers, front and rear. The sensors can be controlled in either the combined send/receive mode or in receive mode alone.

The rear sensors are switched off if a trailer hitch is attached and the trailer plug is connected. The front sensors remain active.

The gap warning starts during reverse or forward driving (acoustic parking system active) at

1. less than approx. 60 cm on all side sensors
2. less than approx. 120 cm for front-center sensors
3. less than approx. 150 cm for rear-center sensors

The Acoustic Parking System (APS) consists of

1. Control module for parking aid -J446
2. Right front parking aid sensor -G252
3. Right front center parking aid sensor -G253
4. Left front center parking aid sensor -G254
5. Left front parking aid sensor -G255
6. Left rear parking aid sensor -G203
7. Left rear center parking aid sensor -G204
8. Right rear center parking aid sensor -G205
9. Right rear parking aid sensor -G206
10. Front parking aid warning buzzer -H22
11. Warning buzzer for parking -H15
12. Switch for parking assistance with integrated function lamp (LED)

After switching ignition on, a self-test is performed that is completed in less than a second. The control module is now permanently in operation, but gap recognition is only activated once reverse gear is engaged or can be activated/deactivated with the switch for parking assistance.

When parking assistance is ready, a short signal is sounded (delay of one second for automatic vehicles due to P-D shift) and the function lamp in the switch lights up. If a malfunction is detected in the system, a constant signal sounds for 5 seconds and the function lamp in the switch for parking assistance blinks.

The pauses between chime impulses get shorter as the gap between vehicles gets smaller. For gaps under 25 cm, the chime becomes constant. (Volume and pitch (frequency) can be adapted using the VAG 1551. See Adaptation (function 10) ).

Special case: driving along a wall

Note. The following description refers only to the VAG 1551 Scan Tool (ST).

1. Electrical Wiring Diagrams, Troubleshooting & Component Locations
2. Service tools handbook
3. Replacement parts catalog

If special testing equipment is required during test drive, note the following

To reduce the risk of personal injury and/or damage of electric and electronic components, always observe the following

1. Always switch ignition off before connecting or disconnecting test/measurement tools.
2. It is possible that the control module will recognize a malfunction and store a DTC during some tests. After completing all tests and repairs, DTC memory should therefore be checked and erased if necessary.
3. Always switch ignition off before disconnecting or connecting battery. Failure to do so may damage a control module.

1. Check fuse for function according to wiring diagram.
2. Connect VAS 5051 tester or VAG 1551 scan tool. See «VAS 5051 TESTER OR VAG 1551 SCAN TOOL, CONNECTING AND SELECTING FUNCTIONS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

Note. If nothing is indicated on display, check voltage supply for VAG 1551 scan tool according to wiring diagram. Additional instructions can be called up via the HELP button on the scan tool. The --> button is used for advancing through the program sequence. An incorrect entry can be canceled using the -C- button. Function 00 "Automatic test sequence" can be performed in operating mode 1 "Rapid data transfer." This automatically checks all control modules installed in the vehicle.

1. Switch on ignition.
2. Switch printer on via the PRINT button (indicator lamp in button lights up).
3. Press button -1- to select "Rapid data transfer" operating mode 1.

Indicated on display

Scheme 332

Address word for Acoustic Parking System: 76

1. Press buttons -7- and -6-.

Indicated on display

Scheme 333

1. Press -Q- button to confirm input.

Indicated on display (example only): after approx. 5 seconds

Scheme 334

1. 4D0919283: Part number of control module for parking aid (see also parts catalog)
2. D03: Software version of control module for parking aid
3. Coding 1108: Coding of control module for parking aid
4. WSC 06812: dealership number

1. Press --> button.

If one of these messages is displayed, perform trouble shooting according to troubleshooting diagnostic.

Scheme 335

Indicated on display

Scheme 336

1. Pressing the HELP button will print out an overview of all of the possible functions.
2. Press the --> button to continue program sequence.

The following functions are possible

1. 01 - Check control module version. See «CHECK CONTROL MODULE VERSIONS (FUNCTION 01)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
2. 02 - Check DTC Memory. See «CHECK DTC MEMORY (FUNCTION 02)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
3. 05 - Erase DTC Memory. See «ERASE DTC MEMORY (FUNCTION 05)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
4. 06 - End Output. See «END OUTPUT (FUNCTION 06)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
5. 07 - Code Control Module. See «CODE CONTROL MODULE (FUNCTION 07)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
6. 08 - Read Measuring Value Block. See «READ MEASURING VALUE BLOCK (FUNCTION 08)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
7. 10 - Adaptation. See «ADAPTATION (FUNCTION 10)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

Indicated on display

Scheme 337

1. Press buttons -0- and -1-. This selects "Check control module" function 01.

Indicated on display

Scheme 338

1. Press -Q- button to confirm input.

Indicated on display (example only): after approx. 5 seconds

Scheme 339

1. 4D0919283: Part number of control module for parking aid (see also parts catalog)
2. D03: Software version of control module for parking aid
3. Coding 1108: Coding of control module for parking aid
4. WSC 06812: dealership number

1. Press --> button.

Note. The displayed DTC information is updated only when initiating OBD or with "Erase DTC Memory" function 05.

1. Switch printer on via the PRINT button (indicator lamp in button lights up).

Indicated on display

Scheme 340

1. Press buttons -0- and -2-. This selects "Check DTC memory", function 02.

Indicated on display

Scheme 341

1. Press -Q- button to confirm input.

The number of stored malfunctions appears in the display.

Scheme 342

1. The stored malfunctions are displayed and printed out one after the other.

1. Check print-out against DTC table and repair all malfunctions as necessary. See «DIAGNOSTIC TROUBLE CODE (DTC) TABLE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

If "No DTC recognized!" is displayed, the program will return to "Select function XX" after the --> button is pressed.

Scheme 343

Indicated on display

Scheme 344

If something else is displayed

See Operating instructions of Scan Tool (ST).

1. End Output (function 06). See «END OUTPUT (FUNCTION 06)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
2. Switch off ignition and disconnect diagnostic connector.

1. The following table lists all malfunctions that can be recognized by the Acoustic Parking System (APS) and printed out by the VAG 1551 scan tool. The malfunctions are listed in order according to their 5-digit numbers.
2. DTC numbers appear only on the print-out.
3. 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.
4. After repairs and function test of the system, DTC memory must always be checked again using the VAG 1551 scan tool and erased.
5. DTC memory records all static and sporadic malfunctions: If a malfunction occurs and persists for at least 2 seconds, it is identified as a static malfunction. If a malfunction does not occur again, it is registered as sporadic. "/SP" will appear at right on scan tool display.
6. 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.
7. Sporadic malfunctions which no longer occur after 50 driving cycles (ignition on at least 5 minutes, vehicle speed above 30 km/h) are erased automatically.

Scheme 345

Scheme 346

Scheme 347

Scheme 348

Scheme 349

Scheme 350

Note. If DTC memory cannot be erased, check DTC memory again and repair malfunction.

1. DTC memory checked. See «CHECK DTC MEMORY (FUNCTION 02)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
2. All malfunctions repaired.

After successful DTC memory check

Indicated on display

Scheme 351

1. Press buttons -0- and -5-. This selects "Erase DTC memory", function 05.

Indicated on display

Scheme 352

1. Press -Q- button to confirm input.

Indicated on display

Scheme 353

DTC memory is erased.

1. Press --> button.

Indicated on display

Scheme 354

Note. Test sequence is faulty if this message is displayed. Test sequence is faulty if this message is displayed.

Follow test sequence exactly: first check DTC memory, repair malfunction(s) if necessary, then erase.

Indicated on display

Scheme 355

1. Press buttons -0- and -6-. This selects "End Output", function 06.

Indicated on display

Scheme 356

1. Press -Q- button to confirm input.

Indicated on display

Scheme 357

1. Switch off ignition.
2. Disconnect harness connectors for the VAG 1551 scan tool

Using this function, the control module for parking aid can be coded as follows

1. Transmission type: Manual or automatic
2. Signal chime for reverse gear engaged: with or without function confirmation
3. Vehicle type: sedan, station wagon, S-version sedan (rest of world) etc.
4. Vehicle model: for example, Audi A8

Note. Via coding, the universally undifferentiated control module for parking aid -J446- can be specifically adjusted to the demands of the vehicle at hand.

Indicated on display

Scheme 358

1. Press buttons -0- and -7- to select "Code Control Module" function 07.

Indicated on display

Scheme 359

1. Press -Q- button to confirm input.

Indicated on display

Scheme 360

1. Input code number using coding table. See «CODING TABLE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__coding-table) . Example: 01108

Indicated on display

Scheme 361

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 362

1. End coding with the --> button.

Indicated on display

Scheme 363

Scheme 364

Indicated on display

Scheme 365

1. Press buttons -0- and -8- to select "Read Measuring Value Block" function 08.

Indicated on display

Scheme 366

1. Press -Q- button to confirm input.

Indicated on display

Scheme 367

1. Enter display group number from table and press -Q- button to confirm input. See «DISPLAY GROUP OVERVIEW»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

The selected measuring value block is now displayed in standard form.

Scheme 368

Scheme 369

Scheme 370

Scheme 371

Scheme 372

Scheme 373

Scheme 374

Scheme 375

Scheme 376

Using the adaptation function, the following changes can be made and saved.

1. Volume of warning chime
2. Pitch (frequency) of warning chime

Rapid data transfer Select function XX HELP

Indicated on display

Scheme 377

1. Press buttons -1- and -0- to select "Adaptation" function 10.

Indicated on display

Scheme 378

1. Press -Q- button to confirm input.

Indicated on display

Scheme 379

1. Input channel number, for example, 01 from adaptation table and press -Q- button to confirm input. See «ADAPTATION TABLE»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

Indicated on display (example only)

Scheme 380

1. Either adjust adaptation value downward using button -1-, upward using button -3- or Press --> button.

1. Press -->button.

Indicated on display

Scheme 381

1. Now enter the adaptation value by hand (for example, 00005).

Indicated on display

Scheme 382

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 383

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 384

1. Press -Q- button to confirm input.

Indicated on display (example only)

Scheme 385

1. Conclude adaptation of the rear warning buzzer volume by pressing the --> button.

Indicated on display

Scheme 386

Perform procedure for adaptation channels 02, 03, and 04 in the same manner.

ADAPTATION FUNCTIONS - ACOUSTIC PARKING SYSTEM

Automatic vertical headlight aim control keeps the tilt angle of the low beams constant, even when vehicle tilt is different due to a load shift or acceleration/deceleration.

There is one level sensor at the front axle and one at the rear axle that register the vehicle's spring deflection. A signal proportional to vehicle speed is also processed by the ABS control module.

The control module evaluates these signals and activates the automatic vertical headlight aim control actuators when the lights are switched on.

Automatic vertical headlight aim control is required by law for vehicles with gas-discharge (xenon) headlights.

Automatic vertical headlight aim control consists of

1. Automatic vertical aim control system control module -J431
2. Left rear level control system sensor -G76
3. Left front level control system sensor -G78
4. Left headlight beam adjusting motor -V48
5. Right headlight beam adjusting motor -V49

When the vehicle is started, it's current tilt is determined according to a specified value and is sent to the automatic vertical headlight aim control actuator, which leads to a one time correction of the headlight tilt, regardless of whether or not low beams are switched on.

Thereafter, changes relative to the specified value are only sent to the automatic vertical headlight aim control actuator when low beams are switched on.

If malfunctions occur in the system, the driver is notified via a warning symbol in the instrument cluster's center display.

Note. The following description refers only to the VAG 1551 Scan Tool (ST).

1. Electrical Wiring Diagrams, Troubleshooting & Component Locations
2. Service tools handbook
3. Replacement parts catalog

If special testing equipment is required during test drive, note the following

To reduce the risk of personal injury and/or damage of electric and electronic components, always observe the following

1. Always switch ignition off before connecting or disconnecting test/measurement tools.
2. It is possible that the control module will recognize a malfunction and store a DTC during some tests. After completing all tests and repairs, DTC memory should therefore be checked and erased if necessary.
3. Always switch ignition off before disconnecting or connecting battery. Failure to do so may damage a control module.

1. Check fuse for function according to wiring diagram.
2. Connect VAS 5051 tester or VAG 1551 scan tool. See «VAS 5051 TESTER OR VAG 1551 SCAN TOOL, CONNECTING AND SELECTING FUNCTIONS»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

Note. If nothing is indicated on display, check voltage supply for VAG 1551 scan tool according to wiring diagram. Additional instructions can be called up via the HELP button on the scan tool. The --> button is used for advancing through the program sequence. An incorrect entry can be canceled using the -C- button. Function 00 "Automatic test sequence" can be performed in operating mode 1 "Rapid data transfer." This automatically checks all control modules installed in the vehicle.

1. Switch on ignition.
2. Switch printer on via the PRINT button (indicator lamp in button lights up).
3. Press button -1- to select "Rapid data transfer" operating mode 1.

Indicated on display

Scheme 387

Address word for automatic vertical headlight aim control: 55

1. Press buttons -5- and -5-.

Indicated on display (example only)

Scheme 388

1. Press -Q- button to confirm input.

Indicated on display (example only): after approx. 5 seconds

Scheme 389

1. 4B0907357A: Part number of control module for automatic vertical headlight aim control (see also parts catalog)
2. D02: Software version of control module for automatic vertical headlight aim control
3. Coding 00001: Coding of control module for automatic vertical headlight aim control
4. WSC 06812: dealership number

1. Press --> button.

If one of these messages is displayed, perform trouble shooting according to troubleshooting diagnostic.

Scheme 390

Indicated on display

Scheme 391

1. Pressing the HELP button will print out an overview of all of the possible functions.
2. Press the --> button to continue program sequence.

The following functions are possible

1. 01 - Check control module version. See «CHECK CONTROL MODULE VERSIONS (FUNCTION 01)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
2. 02 - Check DTC Memory. See «CHECK DTC MEMORY (FUNCTION 02)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
3. 03 - Output Diagnostic Test Mode. See «OUTPUT DIAGNOSTIC TEST MODE (FUNCTION 03)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__output-diagnostic-test-mode-function-03) .
4. 04 - Basic Setting. See «BASIC SETTING (FUNCTION 04)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd__basic-setting-function-04) .
5. 05 - Erase DTC Memory. See «ERASE DTC MEMORY (FUNCTION 05)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
6. 06 - End Output. See «END OUTPUT (FUNCTION 06)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
7. 07 - Code Control Module. See «CODE CONTROL MODULE (FUNCTION 07)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
8. 08 - Read Measuring Value Block. See «READ MEASURING VALUE BLOCK (FUNCTION 08)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

Indicated on display

Scheme 392

1. Press buttons -0- and -1-. This selects "Check control module" function 01.

Indicated on display

Scheme 393

1. Press -Q- button to confirm input.

Indicated on display (example only): after approx. 5 seconds

Scheme 394

1. 4B0907357A: Part number of control module for automatic vertical headlight aim control (see also parts catalog)
2. D02: Software version of control module for automatic vertical headlight aim control
3. Coding 1: Coding of control module for automatic vertical headlight aim control
4. WSC 06812: dealership number

1. Press --> button.

Note. The displayed DTC information is updated only when initiating OBD or with "Erase DTC Memory" function 05.

1. Switch printer on via the PRINT button (indicator lamp in button lights up).

Indicated on display

Scheme 395

1. Press buttons -0- and -2-. This selects "Check DTC memory", function 02.

Indicated on display

Scheme 396

1. Press -Q- button to confirm input.

The number of stored malfunctions appears in the display.

Scheme 397

1. The stored malfunctions are displayed and printed out one after the other.

1. Check print-out against DTC table and repair all malfunctions as necessary. See «Diagnostic Trouble Code (DTC) table»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

If "No DTC recognized!" is displayed, the program will return to "Select function XX" after the --> button is pressed.

Scheme 398

Indicated on display

Scheme 399

If something else is displayed

See Operating instructions of Scan Tool (ST).

1. End Output (function 06). See «END OUTPUT (FUNCTION 06)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
2. Switch off ignition and disconnect diagnostic connector.

Note. The following table lists all malfunctions that can be recognized by automatic vertical headlight aim control and printed out by the VAG 1551 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 VAG 1551 scan tool and erased. DTC memory records all static and sporadic malfunctions: If a malfunction occurs and persists for at least 2 seconds, it is identified as a static malfunction. If a malfunction does not occur again, it is registered as sporadic. "ISP" 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 after 50 driving cycles (ignition on at least 5 minutes, vehicle speed above 30 km/h) are erased automatically.

Scheme 400

Scheme 401

Scheme 402

Scheme 403

Note. In the previous graphic refer to: BASIC SETTING (FUNCTION 04) for performing complete basic setting.

Scheme 404

Output Diagnostic Test Mode (function 03)

Note. Only perform output Diagnostic Test Mode when vehicle is stationary and engine is not running! Switch on ignition Switch on low beams. If malfunctions are found during output Diagnostic Test Mode, determine cause of malfunction and replace faulty component if necessary.

The following system conditions can be activated during actuator test

1. Headlights are lowered
2. Headlights are raised
3. Warning lamp is activated

1. Press buttons -0- and -3- to select "output Diagnostic Test Mode" function 03.

Indicated on display

Scheme 405

1. Press -Q- button to confirm input: Output Diagnostic Test Mode for automatic vertical headlight aim control is initiated immediately.

Indicated on display

Scheme 406

The headlights will be lowered until program is switched further or the lower end position is reached.

1. Press --> button.

Indicated on display

Scheme 407

The headlights will be raised until program is switched further or the upper end position is reached.

1. Press --> button.

Indicated on display

Scheme 408

Warning symbol (auto. vert. headlight aim control) is indicated in the center display of the instrument cluster.

Indicated on display

Scheme 409

1. Press --> button.

The tester returns to the "Select function" mode.

Indicated on display

Scheme 410

Basic Setting (function 04)

Basic setting must be performed after replacing a headlight, axle sensor or the control module. Observe the following

1. Vehicle must be in a precisely defined load condition.

Note. Current specified values and procedures for load condition can be found in the Repair Manual "Maintenance."

See HEADLIGHT AIM, ADJUSTING .

1. Rock vehicle (move bumpers up and down several times, allowing vehicle to come to a rest on its own).

Perform basic setting

1. Press buttons -0- and -4- to select "Basic Setting" function 04.

Indicated on display

Scheme 411

1. Press -Q- button to confirm input.

Indicated on display

1. Input display group number 001.
2. Press -Q- button to confirm input.

Indicated on display

Scheme 412

1. Headlights are moved to set position.

Indicated on display

Scheme 413

1. Headlights are now in the set position. Adjust headlights using headlight adjustment tool (e.g. VAS5046). Basic setting 1 switches the adjustment mode off and enters "headlights not set" into DTC memory.
2. Press --> button.

Indicated on display

Scheme 414

1. Press buttons -0- and -4- to select "Basic Setting" function 04.

Indicated on display

Scheme 415

1. Press -Q- button to confirm input.

Indicated on display

Scheme 416

1. Input display group number 2.
2. Press -Q- button to confirm input.

Indicated on display

Scheme 417

1. The control module has now learned this position as the adjustment position. The entry in DTC memory ("Headlights not set") is erased and adjustment mode is re-initiated.
2. Press --> button.

Indicated on display

Scheme 418

Note. If DTC memory cannot be erased, check DTC memory again and repair malfunction.

1. DTC memory checked. See «Check DTC Memory (function 02)»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .
2. All malfunctions repaired.

After successful DTC memory check

Indicated on display

Scheme 419

1. Press buttons -0- and -5-. This selects "Erase DTC memory", function 05.

Indicated on display

Scheme 420

1. Press -Q- button to confirm input.

Indicated on display

Scheme 421

DTC memory is erased

1. Press --> button.

Indicated on display

Scheme 422

Note. Test sequence is faulty if this message is displayed. Test sequence is faulty if this message is displayed.

Follow test sequence exactly: first check DTC memory, repair malfunction(s) if necessary, then erase.

1. Press buttons -0- and -6-. This selects "End Output", function 06.

Indicated on display

Scheme 423

1. Press -Q- button to confirm input.

Indicated on display

Scheme 424

1. Switch off ignition.
2. Disconnect harness connectors for the VAG 1551 scan tool

Using this function, the control module for automatic vertical aim control can be coded as follows

1. Vehicle model
2. Drive layout

Note. Varying combination possibilities are adjusted via coding.

Indicated on display

Scheme 425

1. Press buttons -0- and -7- to select "Code Control Module" function 07.
2. Press -Q- button to confirm input.

Indicated on display

Scheme 426

1. Input code number using coding table. See «Coding table»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) . Example: 00001

Indicated on display (example only)

Scheme 427

1. Press -Q- button to confirm input.

Indicated on display (example only): after approx. 5 seconds

Scheme 428

1. End coding with the --> button.

Indicated on display

Scheme 429

1. Press buttons -0- and -6-. This selects "End Output", function 06.

Indicated on display

Scheme 430

1. Press -Q- button to confirm input.

Coding table

CONTROL MODULE CODING - AUTOMATIC VERTICAL HEADLIGHT AIM CONTROL

Indicated on display

Scheme 431

1. Press buttons -0- and -8- to select "Read Measuring Value Block" function 08.

Indicated on display

Scheme 432

1. Press -Q- button to confirm input.

Indicated on display

Scheme 433

1. Enter display group number from table and press -Q- button to confirm input. See «Display group overview»(/audi/a8/d3-2002-2005/remont/collisionavoidance/#on-board-diagnostic-obd) .

The selected measuring value block is now displayed in standard form.

Scheme 434

Scheme 435

Scheme 436

1. Battery voltage at least 11 V
2. Ground connections at engine and transmission OK
3. Fuses OK
4. Ground (GND) connections and Ground point for transmission OK

1. Check battery Ground (GND) strap and Ground strap between battery and transmission.
2. Switch ignition off.

Note. Data Link Connector is located at left below the driver-side footwell.

1. Unclip cover for Data Link Connector.
2. Connect VAS 5051 tester to vehicle with VAS 5051/1 diagnostic wire. Alternately, VAG 1551 Scan Tool can also be attached using VAG 1551/3 adapter.

Indicated on display

Scheme 437

1. * Two operating modes are displayed alternately

Note. If nothing appears in display

See Operating instructions of Scan Tool (ST).

1. Switch ignition on.
2. Switch printer on via the PRINT button (indicator lamp in button lights up).
3. Press button 1 to select "Rapid data transfer" operating mode 1.

Indicated on display

Scheme 438

Note. The address word 00 initiates the automatic test sequence, i.e. it results in a DTC check on all OBD capable systems in the vehicle via rapid data transfer.

See also:
• INSTRUMENT CLUSTER, REMOVING AND INSTALLING
• AUTOMATIC CLIMATE CONTROL SYSTEM, ON BOARD DIAGNOSTIC (OBD)
• INDUCTION COIL, REPLACING
• WORK PROCEDURE FOR RE-ADAPTING EXISTING RADIO CONTROLLED KEYS
• THROTTLE VALVE CONTROL MODULE, ADAPTATION
• STEERING COLUMN SWITCHES, REMOVING AND INSTALLING
• HEADLIGHT AIM, ADJUSTING
• ADAPTATION (FUNCTION 10)
• CODING TABLE
• CHECK DTC MEMORY (FUNCTION 02)
• OUTPUT DIAGNOSTIC TEST MODE (DTM) (FUNCTION 03)
• ERASE DTC MEMORY (FUNCTION 05)
• END OUTPUT (FUNCTION 06)
• CODE CONTROL MODULE (FUNCTION 07)
• DIAGNOSTIC TROUBLE CODE (DTC) TABLE
• ADAPTATION VALUE
• DATA EXCHANGE BETWEEN CONTROL MODULES, CHECKING
• ADAPTATION VALUE
• DISPLAY GROUP OVERVIEW
• ADAPTATION TABLE
• RESETTING SRI AFTER SERVICE
• ADAPTATION OF FUEL GAUGE
• LANGUAGE VERSION OF DRIVER INFORMATION MONITOR
• ODOMETER DISPLAY
• ADAPTATION OF AUXILIARY HEATER
• ADAPTATION OF FUEL GAUGE SENDER RESISTANCE RANGE
• DISTANCE DRIVEN SINCE SERVICE
• TIME SINCE SERVICE
• MINIMUM MILEAGE PERFORMANCE
• MAXIMUM MILEAGE PERFORMANCE
• MAXIMUM TIME INTERVAL
• ADAPTATION OF OIL QUALITY
• ADAPTATION OF TOTAL CONSUMPTION QUANTITY
• ADAPTATION FOR POWER TRAIN DATA-BUS
• ADAPTATION FOR COMFORT SYSTEM DATABUS
• ADAPTATION FOR INFORMATION DATA-BUS
• INPUT VALUES FOR REPLACING INSTRUMENT CLUSTER
• ADAPTATION AFTER REPLACING THE INSTRUMENT CLUSTER
• ADAPTATION OF VEHICLE KEYS
• CHECK CONTROL MODULE VERSIONS (FUNCTION 01)
• LOGIN PROCEDURE
• ADAPTATION AFTER REPLACING THE ENGINE CONTROL MODULE (ECM)
• LOST KEY PROCEDURE
• LOGIN PROCEDURE, INSTRUMENT CLUSTER
• LOGIN PROCEDURE, ENGINE CONTROL MODULE (ECM)
• CCS, activating
• ELECTRICAL TEST USING VAG 1598/31 TEST BOX
• CODING TABLE
• OUTPUT DIAGNOSTIC TEST MODE (FUNCTION 03)
• BASIC SETTING (FUNCTION 04)
• SAFETY PRECAUTIONS