TROUBLE SHOOTING
Note. See TROUBLE SHOOTING article in GENERAL INFORMATION.
PRELIMINARY INSPECTION
Verify customer complaint by operating system. Visually inspect for obvious signs of mechanical and electrical damage. Inspect for blown fuses and damaged relays. Inspect for loose or corroded connections, damaged wiring harnesses and/or switches. Check for a broken or partially broken wire inside insulation, which could cause system malfunction but prove good in a continuity/voltage check with system disconnected. Ensure any aftermarket electronic equipment is properly installed. If fault is found, repair as necessary.
REMOVAL & INSTALLATION
| WARNING | Vehicles are equipped with air bag supplemental restraint system. Before attempting any repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS (or AIR BAG SAFETY PRECAUTIONS) and DISABLING & ACTIVATING AIR BAG SYSTEM in appropriate AIR BAG RESTRAINT SYSTEMS article. |
Air Bag
| WARNING | NO ONE must be in vehicle when battery is connected. This is a safety precaution in case an air bag module activates when power is connected. |
ECM
If connector is disconnected from ECM or battery is disconnected, all adaptation values in control module are erased. To achieve optimal anti-theft protection for vehicle, an anti-theft immobilizer was installed. Anti-theft immobilizer is a system for enabling/locking Engine Control Module (ECM) through the W-wire.
This system cannot be circumvented, it is necessary to perform adaptation of anti-theft immobilizer using VAS 5052 in On Board Diagnostic function. The great availability of equipment options makes adaptation of ECM necessary (e.g. cruise control system). This "writing" function is not possible with a generic scan tool, therefore it is necessary to use VAS 5052 in On Board Diagnostic function for this purpose. DTC memory content will remain intact however. If engine is started after this, a rough, uneven idle can result. In this case, ECM readiness code must be regenerated.
ECM Readiness Code
While limited diagnostic information is available, vehicle manufacturer does not support diagnostic information using aftermarket scan tools. To properly diagnose vehicle, it is recommended to use VAS 5051 scan tool with VAS 5051/1 adapter cable or VAG 1551 scan tool with 1551/3A adapter cable and VAG 1598/31 test box.
Readiness code must be generated when Engine Control Module (ECM) memory is cleared, battery voltage is disconnected or ECM is disconnected. To generate readiness code, vehicle must be stationary, transmission in Park or Neutral, all electrical consumers off, A/C switched off and coolant temperature at least 176° F (80° C). If possible, it is best to warm-up vehicle by test driving. Connect scan tool to DLC. DLC is located behind cover under left side of steering column.
Power Windows
After connecting battery, completely open and close all power windows.
Radio
| CAUTION | Turn ignition to OFF position. BEFORE disconnecting negative battery cable, obtain anti-theft radio security code. Disconnect negative battery cable. After reconnecting battery, re-code and check operation of anti-theft radio. |
Vehicles are equipped with an anti-theft stereo system that requires a code to activate. Record stereo code BEFORE disconnecting negative battery cable. Disconnect negative battery cable. Turn ignition to ON position. Reconnect negative battery cable. Enter code into stereo and reset clock.
Telematics
Telematics is an in-vehicle communication system that uses cellular, internet and Global Positioning System (GPS) technologies to provide customer with safety, security and convenience services. On vehicles equipped with Audi Telematics by OnStar®, switch emergency battery for telematic/telephone control module to the OFF position prior to disconnecting vehicle battery. Emergency battery is turned on and off using VAG 1551/VAG 1552 or VAS 5051/VAS 5052 scan tool in address word 75 - TELEMATICS set to function 10 - ADAPTATION CHANNEL 08.
Removal & Installation (2.7L & 2.8 V6)
| CAUTION | Before working on the electrical system |
- Determine the correct coding for the anti-theft radio.
- Disconnect the battery Ground (GND) strap.
Vehicles With V6 Engine (2.7-Liter Biturbo And 2.8-Liter)
Removing
Note. In order to remove the starter the generator must be removed. Refer to for 2.7L Bi-Turbo or refer to for 2.8L.
Scheme 1
Scheme 2
- Remove wire for terminal B+ -1-. (Scheme 1): View Of Starter
- Tightening torque: 16 Nm (12 ft lb)
- Remove electrical connector from terminal 50 -2-.
- Remove mounting bolts -1- and -2- from transmission housing. (Scheme 2): Identifying Transmission Housing Mounting Bolts
- Remove right-front wheel.
- Remove bolt -1- from right wheelhousing.
- Remove bolt -2- from engine side.
- Remove starter from below.
Installing
Scheme 3
- Install in reverse order of removal. Starter bolt size Tightening torques M10 X 135 45 Nm (33 ft lb) M12 X 130 (upper bolt) 65 Nm (48 ft lb)
- Remove rear noise insulation (arrows). (Scheme 3): Removing Rear Noise Insulation
- Remove mounting bolts -1- and -2- from transmission housing. see scheme 4: Identifying Transmission Housing Mounting Bolts
- Remove starter from rear.
Installing
- Install in reverse order of removal. Starter bolt size Tightening torques M10 X 135 45 Nm (33 ft lb) M12 X 130 (upper bolt) 65 Nm (48 ft lb)
- Install in reverse order of removal. Starter bolt size Tightening torques M10 x 135 45 Nm (33 ft lb) M12 x 130 (upper bolt) 65 Nm (48 ft lb)
Removing
Scheme 4
Scheme 5
- Remove noise insulation (arrows). (Scheme 4): Removing Noise Insulation
- Remove right wheel.
- Remove heat shield for right drive axle (arrows). (Scheme 5): Removing Heat Sheild For Right Drive Axle
- Unbolt right drive shaft from transmission flange.
- Repair Manual, Suspension, Wheels, Steering, Repair Group 40
- Remove bolt -1- located above right wheel housing (16 mm). see scheme 7: Identifying Transmission Housing Mounting Bolts
- Tightening torques: 65 Nm
- You can unbolt bolts -2- (16 mm) from the engine side.
- Tightening torques: 65 Nm
- Remove the starter downward.
- To install, perform the steps described for removal in reverse order.
Scheme 6
- Obtain radio anti-theft code. On models equipped with Audi Telematics by OnStar®, switch off emergency (back-up) battery. See «BATTERY DISCONNECT PRECAUTIONS»(/audi/a6/c5-2001-2004/remont/starter/#starters). Disconnect negative battery cable. Remove generator. See «GENERATORS & REGULATORS»(/audi/a6/c5-2001-2004/remont/charging-system/#generators-regulators) article in ELECTRICAL.
- Disconnect electrical connections at starter solenoid. Disconnect insulator from B+ connection of starter. Remove bolt (1) securing ground wire to right engine mount. (Scheme 6) Remove bolts securing starter to transmission. Remove starter.
- To install, reverse removal procedure. Tighten all bolts/nuts to specification. See «TORQUE SPECIFICATIONS»(/audi/a6/c5-2001-2004/remont/starter/#starters__torque-specifications).
Removal & Installation (4.2L V8)
- Obtain radio anti-theft code. On models equipped with Audi Telematics by OnStar®, switch off emergency (back-up) battery. See «BATTERY DISCONNECT PRECAUTIONS»(/audi/a6/c5-2001-2004/remont/starter/#starters). Disconnect negative battery cable. Raise and support vehicle.
- Remove noise insulation panel. (Scheme 7) Remove cable retainer (2) from engine mount. (Scheme 8) Disconnect electrical connector (1) at engine mount.
- Remove bolt securing ground wire to frame. (Scheme 9) Remove bolt securing starter bracket. (Scheme 10) Disconnect electrical connections at starter solenoid.
- Remove bolts securing starter to transmission. (Scheme 11) Turn starter to right (clockwise) and downward. Remove starter. To install, reverse removal procedure. Tighten all bolts/nuts to specifications. See «TORQUE SPECIFICATIONS»(/audi/a6/c5-2001-2004/remont/starter/#starters__torque-specifications).
Scheme 7
Scheme 8
Scheme 9
Scheme 10
Scheme 11
OVERHAUL
Note. Information not available from manufacturer.
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| Line Retainer-To-Engine Mount (4.2L) | 16 (22) | |
| Starter Mounting Bolt | 48 (65) | |
| Starter Solenoid Terminal Nut | 12 (16) | |
TORQUE SPECIFICATIONS
WIRING DIAGRAMS
See appropriate STARING/CHARGING wiring diagram in SYSTEM WIRING DIAGRAMS article.