Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1999 Audi A8 BaseFACTORY OEM SERVICE PROCEDURE
On Board Diagnostic (OBD) - Abs/EDL/ASR
- On Board Diagnostic (OBD)
- CAN-bus, function
- Bus:
- Can:
- Two-line bus system, checking
- The DTC table indicates the bus must be checked
- Is there is a malfunction?
- While checking the bus lines, differentiate between the following two situations:
- Two control modules are communicating across a "two-line bus system"
- Three or more control modules are communicating across a "two-line bus system"
- Reconnecting battery, procedures
- ABS/EDL and ABS/EDL/ASR Bosch 5.0
- Application notes
- Safety measures and basic rules for troubleshooting
- Technical publications required
- Function of Bosch ABS 5.0 Series
- Table of warning light functions
- Function of On Board Diagnostic (OBD)
- Check control module version
- Check DTC memory
- Encode control module
- Read measured value block
- Electrical testing
- ABS/EDL and ABS/EDL/ASR Bosch 5.3
- Application notes
- Safety measures and basic rules for troubleshooting
- Function of Bosch ABS 5.3 Series
- Table of warning light functions
- Function of On Board Diagnostic (OBD)
- Check control module version
- Check DTC memory
- Output Diagnostic Test Mode (DTM)
- Encode control module
- Read measured value block
- Electrical testing
- Electronic Stabilization Program (ESP)
- Notes
- Safety measures and troubleshooting basics
- Technical information required
- ESP function
- Notes
- EBD
- Abs
- EDL
- ASR
- Esp
- The new components:
- Hydraulic pump for traction control -V156- and the sensor for brake pressure -G201-
- Steering Angle Sensor -G85-
- Airbag spiral spring/return spring with slip ring -F138-
- Sender for rotation rate -G202-
- Sensor for transverse acceleration -G200-
- The parking brake switch
- The ABS solenoid valve relay -J106- and the ABS return flow pump relay -J105-
- ABS/ESP Control Module CAN Bus
- Indicator light functions, overview
- On Board Diagnostic (OBD), specific functions
- Control module versions (scan tool function 01), checking
- On Board Diagnostic (OBD)
- Basic setting (scan tool function 04)
- Output Diagnostic Test Mode (DTM) (scan tool function 03)
- Code Control Module (scan tool function 07)
- Measuring Value Block (scan tool function 08), reading
- On Board Diagnostic (OBD) of tire pressure control system
- Safety precautions
- Test requirements:
- On Board Diagnostic (OBD) functions
- Check control module version
- Check DTC memory
- DTC table for tire pressure monitoring
- Encode control module
- Read measured value block
- Notes
- Measured value block 001
- Measured value block 002
- Measured value block 003
- Measured value block 004
- Measured value block 005
- Measured value block 006
- Measured value block 007
- Measured value block 008
- Measured value block 009
- Measured value block 010
- Measured value block 011
- Measured value block 013
- Measured value block 014
- Measured value block 015
- Measured value block 016
- Measured value block 017
- Measured value block 018
- Measured value block 021
- Adaptation
- Tire pressure monitoring system, operating for the first time
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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