1998 Audi A8 A/C & Heater Service (ONLINE REPAIR MANUALS)

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A/C & HEATER SERVICE PROCEDURES FOR 1998 Audi A8 AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1998 Audi A8 cars and light trucks from 1990+

Imported Cars & Light Trucks & Vans -> 1998-2000 -> Evacuating System -> Using Charging Station -> Using Vacuum Pump
Vehicle: 1998 Audi A8 3.7 V8 GAS

Using Vacuum Pump

Vacuum pumps suitable for removing air and moisture from A/C systems are commercially available. A specification for system pump down used here is 28-291/2 inches vacuum. This reading can be attained at or near sea level only. For each 1000 feet of altitude this operation is performed, the reading will be 1 inch vacuum higher. For example, at 5000 feet elevation, only 23-241/2 inches of vacuum can be obtained. The system refrigerant must be completely recovered before it can be evacuated. Damage to the vacuum pump will result if pressurized ...

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A/C & HEATER SERVICE PROCEDURES FOR 1998 Audi A8 AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1998 Audi A8 cars and light trucks from 1990+

Computer Relearn Procedures -> Audi -> 1995-97 -> 1998-2004 -> OBD -> OBD II
Vehicle: 1998 Audi A8 3.7 V8 GAS

OBD

Whenever the ECM is replaced, the new ECM will need to be " Coded." Use the following procedure to "Code" the ECM.

  • Connect VAG 1551, or equivalent scan tool to the diagnostic connector.
  • Operate scan tool until display shows "Select Function XX."
  • Press scan buttons 0 and 7 to select "Code Control Module" function, then press "Q" button to confirm input.
  • "Code Control Module" and " Enter Code Number" should appear on the display.
  • Enter correct code number as follows:
    • Code 0003: Vehicles with manual transmission.
    • Code 0004: Vehi...

CLICK HERE TO GET FULL ACCESS TO 1998 Audi A8 A/C & HEATER SERVICE PROCEDURES

A/C & HEATER SERVICE PROCEDURES FOR 1998 Audi A8 AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1998 Audi A8 cars and light trucks from 1990+

Audi -> Component Replacement & Adjustment -> Timing Belt, Replace -> 2.8L Engine
Vehicle: 1998 Audi A8 3.7 V8 GAS

2.8L Engine

Mark direction of travel on serpentine drive belt and timing belt for installation reference.

  • Remove serpentine drive belt.
  • Unclip timing belt upper covers on both sides, Fig. .
  • Position crankshaft at TDC compression stroke. Align notch on crankshaft pulley with notch on front case, Fig. .
  • Ensure large holes of locating plates on camshaft sprockets face each other. If not, rotate crankshaft one turn and reinspect position of camshaft sprocket plate large holes.
  • Remove crankshaft position sensor. Crankshaft positi...

CLICK HERE TO GET FULL ACCESS TO 1998 Audi A8 A/C & HEATER SERVICE PROCEDURES

A/C & HEATER SERVICE PROCEDURES FOR 1998 Audi A8 AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1998 Audi A8 cars and light trucks from 1990+

Air Bag System Precautions -> Audi -> Disarming -> Air Bag II & III System -> Air Bag V System
Vehicle: 1998 Audi A8 3.7 V8 GAS

Air Bag II & III System

The system must be disarmed prior to disconnecting any air bag system electrical connectors or servicing any system components or other components located near an air bag system electrical connector. Obtain the radio security code prior to disconnecting the battery ground cable. Establishing the engine control module and automatic transmission control module settings may be required using scan tool No. VAG 1551, or equivalent.

  • Disconnect battery ground cable and cover negative terminal.
  • On 1990-92 Coupe, Quattro, 80/90 and 19...

CLICK HERE TO GET FULL ACCESS TO 1998 Audi A8 A/C & HEATER SERVICE PROCEDURES

A/C & HEATER SERVICE PROCEDURES FOR 1998 Audi A8 AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1998 Audi A8 cars and light trucks from 1990+

Audi -> Component Replacement & Adjustment -> Heater Core, Replace -> A4 -> A6 -> A8 -> Cabriolet -> Driver Side -> Passenger Side
Vehicle: 1998 Audi A8 3.7 V8 GAS

A4
  • On models with audio coded anti-theft system, refer to "Precautions."
  • On all models, recover refrigerant as outlined under .
  • Remove right air plenum cover, then the water guide.
  • Remove dust and pollen filter air plenum hosing.
  • Open cap at coolant system expansion tank.
  • Clamp coolant hoses, then remove hoses from heater core inlet/outlet, Fig. .
  • Place a suitable catch basin below heater core connection "A," then blow coolant out of heater core with compressed air through connection "B."
  • Remove A/C system vacuum supply hose from e...

CLICK HERE TO GET FULL ACCESS TO 1998 Audi A8 A/C & HEATER SERVICE PROCEDURES

A/C & HEATER SERVICE PROCEDURES FOR 1998 Audi A8 AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1998 Audi A8 cars and light trucks from 1990+

Audi -> Component Replacement & Adjustment -> Blower Motor, Replace -> A4 -> A6 -> A8 -> Cabriolet
Vehicle: 1998 Audi A8 3.7 V8 GAS

A4
  • On models with audio coded anti-theft system, refer to "Precautions."
  • On all models, remove cover from under glove compartment, then the glove compartment.
  • Remove angle bracket attaching screws, then the angle brackets (4), Fig. .
  • Disconnect orange air bag unit electrical connector. Orange electrical connector is connected to wiring harness and is located on center tunnel behind left side of the air bag unit. Do not disconnect red two pin connections on air bag unit. If red two pin electrical connection on air bag unit is loose, air bag unit m...

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