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.
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HOMESERVICE MANUALSAUDI1999A6 BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSANTI-THEFT & POWER DOOR LOCK SYSTEMS
1999 Audi A6 Base
Anti-Theft & Power Door Lock Systems
1999 Audi A6 BaseSECTION Anti-Theft & Power Door Lock Systems
- Description & Operation
- Programming
- Self-Diagnostic System
- Entering On Board Diagnostic Function Modes
- Function Mode 01: Checking Control Module Versions
- Function Mode 02: Retrieving DTC Memory
- Function Mode 03: Output Diagnostic Test
- Function Mode 05: Erasing DTC Memory
- Function Mode 06: Exiting On-Board Diagnostics
- Function Mode 07: Code Control Module
- Function Mode 08: Reading Measured Value Block
- Function Mode 10: Adaptation
- Diagnostic Tests
- Notes
- DTC 00668: Low Or No Battery Voltage At Terminal 30
- DTC 00849: Starter Switch "S" Terminal
- DTC 00947: Tailgate Remote Switch
- DTC 00951: Rear Lid Unlocking Motor
- DTC 00952: Driver's Door Open Signal
- DTC 00955: Key 1, Adaptation Limit Exceeded
- DTC 00956: Key 2, Adaptation Limit Exceeded
- DTC 00957: Key 3, Adaptation Limit Exceeded
- DTC 00958: Key 4, Adaptation Limit Exceeded
- DTC 00991: Interior Lighting
- DTC 01141: Trunk Lid Release
- DTC 01366: Crash Signal
- DTC 01368: Alarm, Trunk Switch
- DTC 01369: Alarm, Hood Switch
- DTC 01370: Alarm, Interior Scanner
- DTC 01371: Alarm, Driver's Side Door Switch
- DTC 01373: Alarm, Radio Ground Terminal
- DTC 01374: Alarm, Ignition Switch Terminal 15
- DTC 01377: Left Ultrasonic Sensor Malfunction
- DTC 01378: Right Ultrasonic Sensor Malfunction
- DTC 01379: Interior Monitoring Switch Short To Ground
- DTC 01380: Left Rear Alarm Trigger
- DTC 01381: Right Rear Alarm Trigger
- DTC 01382: Left Front Alarm Trigger
- DTC 01383: Right Front Alarm Trigger
- DTC 01389: Tailgate Switch
- DTC 01482: Central Locking Motor
- DTC 01557: Driver's Key Switch
- DTC 01558: Driver's Key Switch
- DTC 01559: Driver's Door Lock
- DTC 01560: Passenger's Door Lock
- DTC 01561: Left Rear Door Lock
- DTC 01562: Right Rear Door Lock
- DTC 01563: Driver's Interior Lock Switch (Lock)
- DTC 01564: Driver's Interior Lock Switch (Unlock)
- DTC 01565: Trunk Compartment Light
- DTC 01566: Interior Monitoring Set Signal
- DTC 01568: Comfort Opening Signal
- DTC 01569: Comfort Closing Signal
- DTC 01570: Ignition Switch Terminal 15 Extension
- DTC 01571: Seat Memory Signal
- DTC 01572: Alarm, Passenger's Door Contact Switch
- DTC 01573: Alarm, Left Rear Door Contact Switch
- DTC 01574: Alarm, Right Rear Door Contact Switch
- DTC 01581: Incorrect System Component
- DTC 01585: Passenger's Key Switch Open
- DTC 01586: Passenger's Key Switch Short
- DTC 65535: Control Module Malfunction
- Removal & Installation
- Wiring Diagrams
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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.