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Maintenance Procedures: Diagnosis Audi S8 D3 facelift

Procedures ~655 words

Delivery inspection

For additional information regarding inspection service, refer to ServiceNet, Maintenance Schedules for appropriate model year or Perfect Delivery Inspection (PDI) forms located in ServiceNet.

Inspection service

For information regarding inspection service, refer to ServiceNet, Maintenance Schedules for appropriate model year

Brake system: Visual inspection for leaks and damage

  1. Check the following components for leaks and damage
  1. Brake master cylinder
  2. Brake booster
  3. ABS Hydraulic unit
  4. Brake calipers
  1. Check that brake hoses are not twisted.
  2. Ensure brake hoses do not come in contact with any vehicle components when steering is at full lock.
  3. Check brake hoses for porosity, bubbles and cracks.
  4. Check brake hoses for chafing.
  1. Check all brake line connections for secure mounting, leaks, or corrosion.
WARNINGMalfunctions found must be rectified (repair measure).
  1. Check running surfaces and side walls for damage, remove foreign material, if necessary.
  1. Check running surfaces and side walls for damage, remove foreign material, if necessary.
  2. Check tires for scuffing, one sided wear, porous side walls, cuts and fractures.
WARNINGReport any damage to customer and mark repair order accordingly.

When driving, fluid level drops slightly from use and automatic brake pad adjustment.

  1. Always check fluid level in conjunction with brake pad wear
  1. When brake pads are new or if there is still enough brake lining left, the brake fluid level must be between MIN and MAX marks.
  2. With brake fluid at MIN mark or slightly above, topping off brake fluid is not necessary when wear limit of brake pads has been almost reached.
WARNINGIf brake fluid level is below MIN mark, check brake system (repair procedure), before adding brake fluid.

DTC memory, interrogating with VAS 5051/ 5052

  1. Follow these steps in sequential order.
  1. Connect VAS 5051/5052
  2. Vehicle - Self-diagnosis
  3. Gateway - Installation list
  4. Read control module with stored DTC memory.
  1. Correct relevant malfunctions with customers approval.

Engine (from above and below) and engine compartment: Visual inspection for leaks and damage

Perform visual check as follows

  1. Check engine and engine compartment for leaks and damage.
  2. Check lines, hoses and connections on following systems for leaks, chafing, porosity and cracks
  1. Fuel system
  2. Cooling and heating system
  3. Brake system
  1. Perform visual inspection from below using same viewpoints as when vehicle was on lift and noise insulation removed.
WARNINGMalfunctions found must be rectified (repair measure).

Test drive: Perform

To what extent the following can be checked is dependent upon the vehicle equipment and local conditions (urban/country).

  1. The following should be checked by means of a road test
  1. Engine: Output, misfiring, idling speed, acceleration
  2. Clutch: Pulling away, pedal pressure, odors
  3. Gear selection: Ease of operation, shift lever position
  4. Automatic transmission: Selector lever position, shift lock / ignition key removal lock, shift behavior, instrument panel insert display
  1. Foot and parking brake: Function, free-play and action, one-sided pull, chatter, squealing.
  2. ABS function: A pulsing at the brake pedal must be felt when performing ABS controlled braking
  3. Steering: Function, steering free play, steering wheel centralized when wheels are in straight ahead position
  4. Tilt/slide sunroof: Function
  1. Cruise Control System (CCS): Function
  2. MMI function (radio, navigation, etc.)
  3. Driver Information System (DIS): Functions
  4. A/C system: Function
  1. Vehicle: Moving off line when traveling straight ahead (level road)
  2. Imbalance: Wheels, drive shafts
  3. Wheel bearings: Noises
  4. Engine: Hot starting behavior

Underbody protection: Visual inspection for damage

  1. When inspecting visually, observe underbody, wheel housings and sills!
WARNINGMalfunctions found must be rectified (repair measure).

Vehicle checks within inspection and service framework

For vehicle checks, we recommend interactive acceptance VAS 5000 and performance test stand V.A.G 1858.

Brake check

Information for checking brakes on front and all wheel drive vehicles is in the corresponding brake system article.

Performance check

Perform performance check on performance test stand recommended by Audi. The corresponding correction factors for automatic transmissions and all wheel drive are provided in these test stands. Vehicles with all wheel drive may only be tested on a four-wheel performance test stand. The four-wheel performance test stand V.A.G 1858 has movable rollers in order to be able to test vehicles with different axle spacing.

Tachometer check

With the tachometer test, the vehicle wheels are driven. Vehicles with all wheel drive may only be tested on a four-wheel test stand.

Shock absorber check

Information on testing shock absorbers can be found in the suspension article.

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