RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
Emergency Battery: Procedures
Telematics Emergency Battery, Switching On/Off
In order to avoid unnecessary discharge of the emergency (back-up) battery, it must always be switched off prior to disconnecting the vehicle battery,
and switched back on after the vehicle battery is reconnected.
Should the existing Telephone/Telematics Control Module (J526) be removed and reinstalled, the emergency (back-up battery) must be switched off
prior to removal, and switched on after reinstallation.
Should the Telephone/Telematics Control Module ( J526) be replaced and configured, the emergency (back-up battery) must be switched off prior to
removal, replaced, and switched on after control module installation and coding => [ Telematics Emergency Battery ] See: Removal and
Replacement/Telematics Emergency Battery
Preparation:
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Connect and use VAS 5051/5052 in mode "Guided Fault Finding "
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Enter appropriate model, equipment and model year information and press ">" to confirm.
After all control modules have been registered and DTC memories checked:
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Press "Go to"
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Select: "Function/Component Selection"
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Select: "Body, (Rep. Gr. 01; 27; 50-97)"
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Select: "Electrical equipment" (Repair Groups 01; 27, 90-97 "
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Select: "01 - On Board Diagnostic (OBD) capable systems"
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Select: "75- Telematics USA"
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Select: "Functions - Telematic"
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Select: "J526 - Telephone/Telematic Ctrl. Module, service mode disco. battery "
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If necessary, press ">" to advance
Switching off:
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Select/press button "3 - Service mode activating (no load on emergency battery)"
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Follow the tester's prompts.
Switching on:
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Select/press button "1 - Service mode deactivating (normal operating condition)"
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Follow the tester's prompts.