A8L V8-4.2L (BFM) (2004)
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Remove nuts at positive terminal -2- and negative terminal -1-.
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Release retainer and remove connector -4- from holder.
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Disconnect electrical connection.
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Release retainer tabs -arrows- and remove relay from mounting.
Installing
Install in reverse order of removal, noting the following:
After battery is reconnected:
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Deactivate telematics control module service mode. Use VAS 5051 Vehicle Diagnostic Testing and Information System in mode: "Guided Fault
Finding".
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Activate automatic open/close function of electric window lifters.
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Turn ignition key in ignition lock once to left as far as it will go.
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Synchronize any additional keys to ensure remote operation.
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Use VAS 5051 to check and erase all control module DTC memories related to "low voltage".
NOTE: After re-connecting power supply, ABS warning lamp may only go out after the vehicle has been driven a few meters.
Tightening torques
Component
Nm
Battery terminal to battery post
6
Positive wire to battery shut-off relay
22
