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Audi A8 1994 Service Manual

Motronic injection and ignition system (6-cylinder)
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Service
Audi A8 1994 ➤
Motronic injection and ignition system (6-cylinder)
Engine ID
Edition 02.1999
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Service Department. Technical Information
AQD APR

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Summary of Contents for Audi A8 1994

  • Page 1 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 2 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 3: Table Of Contents

    Renewing engine control unit -J220 ..........31 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability 1.10 Testing idling speed .
  • Page 4 Checking control unit voltage supply ......... .102 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document.

  • Page 5: Self-Diagnosis

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 6: Connecting Vehicle Diagnostic, Testing And Information System Vas 5051 Or Fault Reader V.a.g 1551 And Selecting Functions

    -> Connect vehicle diagnostic, testing and information system VAS 5051 with diagnosis cable VAS 5051/1. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 7 -> Press keys 0 and 1 for address word "Engine electronics" and confirm entry by pressing the Q key. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 8: Interrogating And Erasing Fault Memory

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability -> The display will show either the number of faults stored or the message "No fault recognised!".

  • Page 9: Fault Table

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 10 Bank 1, Probe 1 Electrical fault in current circuit Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability => Page P0131...
  • Page 11 => Page P0604 16988 Control unit defective permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability P0605 16989 Control unit defective with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 12 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not System too rich permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 13 Injector Cyl. 6 -N84 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability Short to Positive with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 14 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not sor => -G163 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability Short to Earth with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 15 Short to Posi‐ tive Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability P1393 17801 Ignition output Test activation and/or with respect to the correctness of information in this document.
  • Page 16 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not tive permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability P1511 17919 Intake manif. with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 17 Implausible signal 1) for throttle valve drive Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability => Page P1543 17951 Angle sender for throt.
  • Page 18 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 19: Final Control Diagnosis

    -N205 and -N208) Test requirements Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability • Fuses for engine electronics okay with respect to the correctness of information in this document.
  • Page 20 (only on vehicles with secondary air system) Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability Press ⇒key.

  • Page 21: Basic Setting

    Electrical consumers switched off (radiator fan must not run during the check) permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 22 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 23: Coding Control Unit

    "01" ( => Page permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 24 01 = Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability 02 = 2 = Four-wheel drive without trac‐...

  • Page 25: Reading Measured Value Block

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 26: Mixture Preparation, Injection

    AUDI AG. AUDI AG does not guarantee or accept any liability ◆ During some of the tests the control unit may identify and record faults. The fault memory should therefore with respect to the correctness of information in this document.

  • Page 27: Technical Data

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not =>Page permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 28 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not 3 4 pin connector permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 29 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 30 Motronic injection and ignition system (6-cylinder) - Edition 02.1999 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability 12 Fuel pressure regulator with respect to the correctness of information in this document.
  • Page 31 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 32: Dismantling And Assembling Fuel Rail With Injectors

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 33: Removing And Installing Parts Of Intake Manifold Change-Over

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not 1 Vacuum unit permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 34: Wiring And Component Check With Test Box V.a.g 1598/31

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 35: Renewing Engine Control Unit -J220

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 36 Press the "1" key twice for the "Log-in procedure" function and confirm entry with Q key. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 37: Testing Idling Speed

    % 0 0 0 0 0 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG. 1.10 - Testing idling speed...

  • Page 38: Checking Fuel Pressure Regulator And Holding Pressure

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not it matches the specified value. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability ◆ This means that the actual engine speed when idling should always be approximately the same as the with respect to the correctness of information in this document.
  • Page 39 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not Note: permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 40: Checking Injectors

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability When disconnecting the pressure gauge, close the cut-off valve, unscrew the union on adapter V.A.G 1318/15, with respect to the correctness of information in this document.
  • Page 41 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 42 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 43 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 44: Testing Injection Quantity, Leak-Tightness And Spray Pattern Of Injectors

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 45 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not glasses on a level surface. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 46: Testing Fuel Pump Relay -J17 And Relay Activation

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not When doing this the ignition must be switched on. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 47 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 48 => Current flow diagrams, Electrical fault finding and Fitting locations binder Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability If the specification is obtained: with respect to the correctness of information in this document.

  • Page 49: Testing Air Mass Meter -G70

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 50 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not - Eliminate load (air conditioner, power steer‐ permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability ing, alternator) with respect to the correctness of information in this document.
  • Page 51 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 52: Checking Intake Air System For Leaks (Unmetered Air)

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability Test all wires for short circuits with each other.

  • Page 53: Testing Intake Air Temperature Sender -G42

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not Display Group 4: Intake air temperature with engine idling permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 54 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 55: Testing Coolant Temperature Sender-G62

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not Enter display group number XXX permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 56: Testing Lambda Control

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability Because of the sharp voltage jump the lambda control cannot maintain a constant ideal mixture composition with respect to the correctness of information in this document.

  • Page 57: Testing Lambda Probe And Lambda Control

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not Enter display group number XXX permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 58 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not (1...4 = display zones) permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 59 Specification -10.0...10.0 % -10.0...10.0 % -10.0...10.0 % -10.0...10.0 % permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability (slight fluctuation (slight fluctuation (slight fluctuation (slight fluctuation with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 60 Test the lambda probe heating Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability => Page with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 61: Testing Lambda Probe Heating

    Bank 1, Probe 1 => Page permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 62 Display Group 42: Lambda probe heating, Bank 2 (at idling speed) Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability Display x.xx Kω...
  • Page 63 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 64: Testing Lambda Probe Signal Wiring And Activation

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability -> Test voltage by connecting hand-held multimeter V.A.G 1526 (measuring range 2 V) between sockets 3 with respect to the correctness of information in this document.
  • Page 65 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 66 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 67: Removing And Installing Lambda Probe

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 68: Testing Intake Manifold Change-Over Valve -N156

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not Display Group 95: Intake manifold change-over with vehicle being driven permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability Display xxxx rpm x.xx ms...
  • Page 69 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 70 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 71: Testing Vacuum System

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not Unplug connector from intake manifold change-over valve -N156. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 72: Testing Secondary Air System

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 73 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not Repeat final control diagnosis. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 74: Testing Secondary Air Pump Relay -J299

    1598/31 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability Resistance in wiring: max. 1.5 ω with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 75 => Current flow diagrams, Electrical fault finding and fitting locations binder permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 76: Testing Fuel Tank Breather System

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 77 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 78 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not =>Page permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 79 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 80: Testing Electronic Engine Power Control (Electronic Throttle)

    When the engine is running (i.e. under load) the engine control unit can open and close the throttle valve freely permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability (i.e. independently of the signals being sent by the accelerator position sender).
  • Page 81 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 82 0 to 8. (Some of the figures Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability may skip.) with respect to the correctness of information in this document.

  • Page 83: Testing Angle Senders For Throttle Valve Drive

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not Switch ignition on. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 84: Notes On Epc Warning Lamp (Fault Warning Lamp For Electronic Throttle) In Dash Panel Insert

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability 6.6 - Notes on EPC warning lamp (fault warning lamp for electronic throttle) in dash panel with respect to the correctness of information in this document.

  • Page 85: Checking Accelerator Position Senders-G79 And -G185

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 86 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not Switch ignition on. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability Connect hand-held multimeter (voltage range) between the following sockets on the connector: with respect to the correctness of information in this document.

  • Page 87: Checking Brake Light Switch -F And Brake Pedal Switch -F47

    7.2 - Checking brake light switch -F and brake pedal switch -F47 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 88 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not Note Both readouts must change permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG. from 0 to 1.

  • Page 89: Testing Clutch Pedal Switch -F36

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not control unit itself. permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability => Page with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 90 Switch positions Specified speed Switch positions for cruise con‐ permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability trol system with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 91: Rectify Any Open/Short Circuit As Necessary

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability => General body repairs, Interior; Repair group 68; Storage compartments, covers and trim parts; Removing with respect to the correctness of information in this document.

  • Page 92: Testing Auxiliary Signals

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not To obtain engine speed, proceed as follows: permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 93 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not A/C-High Compr. ON permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG. Specification A/C-High Compr.

  • Page 94: Testing Data Exchange Between Control Units

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability If the fault table instructs you to test the data exchange between the engine control unit, ABS control unit, with respect to the correctness of information in this document.
  • Page 95 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not - No message from control unit 2 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 96 If no fault can be found in the bus wires replace control unit 2. Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability Example 3: with respect to the correctness of information in this document.
  • Page 97 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 98: Ignition System

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not ◆ The ignition must be switched off before connecting or disconnecting injection or ignition system wiring or permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability tester cables.

  • Page 99: Removing And Installing Parts Of The Ignition System

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 100 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 101: Testing Ignition Coils

    Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 102 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.
  • Page 103 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not If specified results are not obtained, test for open circuit using current flow diagram. Rectify any open circuits permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability and test the fuse.
  • Page 104 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by AUDI AG.

  • Page 105: Testing Engine Speed Sender -G28

    Fit a new engine speed sender. Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability If the specification is attained: with respect to the correctness of information in this document.

  • Page 106: Checking Control Unit Voltage Supply

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