BELT TENSION
Serpentine belt tension is automatically adjusted by tensioner.
DRIVE BELT ROUTING
Note. Serpentine belt is self-adjusting. For drive belt routing (Scheme 35)- (Scheme 37).
Scheme 35
Scheme 36
Scheme 37
BRUSHES
Remove generator. See GENERATOR under REMOVAL & INSTALLATION. Remove voltage regulator from back of generator. See VOLTAGE REGULATOR under REMOVAL & INSTALLATION. Brushes are integrated with voltage regulator. Brush wear limit is 0.2" (5 mm).
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.
VOLTAGE REGULATOR
Note. Manufacturer does not provide specific procedures for removal and installation of voltage regulator. As an aid in removal and installation (Scheme 38)
