A8L V8-4.2L (BFM) (2004)
Charging System Control Module: Procedures
Energy Management Control Module -J644-, Removing And Installing
Removing
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If control module is replaced, select "Replacement" function for appropriate control module in "Guided Fault-Finding" routine.
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VAS 5051 Vehicle Diagnostic Testing and Information system must be used for this purpose.
CAUTION:
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Under no circumstances must the battery be charged during the removal and installation of -J644-.
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On vehicles fitted with Telematics system, activate Telematics control module service mode before disconnecting battery. Use VAS 5051 Vehicle
Diagnostic Testing and Information System in mode: "Guided Fault Finding".
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Switch off all electrical consumers.
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Switch ignition off and remove ignition key.
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Disconnect negative (-) battery terminal.
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Remove Ground (GND) stud -3- and nut -2-.
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Remove control module -J644-.
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Disconnect electrical connectors -1-.
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Remove Ground (GND) wire from control module to battery.
Installing
CAUTION: In order to ensure the proper function of -J644-, the sequence of the following procedure must be strictly followed.
1
Reinstall Ground (GND) wire from battery to relay
2
Reinstall control module to vehicle in conjunction with Ground (GND) stud -3- and nut -2-
3
Reconnect negative (-) battery terminal to battery
4
Reconnect electrical connectors -1-
Then:
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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".