A4 Quattro Cabriolet V6-3.2L (BKH) (2007)
Battery: Component Tests and General Diagnostics
Battery No-Load Voltage, Checking
Battery No-Load Voltage, Checking
Special tools, testers and auxiliary items required
‹› Multimeter (VAG 1526 B), Fluke (83) or equivalent
Test requirements
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Always heed the following, otherwise correct measurement is not guaranteed.
‹› If no load voltage measurement is carried out with the battery installed in vehicle, disconnect negative ( - ) battery terminal.
‹› The battery must not be loaded by connected power consumers for at least 2 hours before making measurements.
‹› The battery must not be charged for at least 2 hours before making the measurements.
CAUTION!
‹› On vehicles equipped with Audi Telematics by OnStar(R), switch-off the emergency (back-up) battery for the Telematic/Telephone
Control Module prior to disconnecting vehicle battery.
‹› After reconnecting vehicle battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows
according to Repair Information and/or Owner's Manual.
‹› After reconnecting vehicle battery on vehicles equipped with Audi Telematics by OnStar(R), switch-on the emergency (back-up)
battery for the Telematic/Telephone Control Module
CAUTION!
‹› Switch off all electrical consumers.
‹› Switch the ignition off and remove ignition key.
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Disconnect negative ( - ) terminal from battery post.
Battery in engine compartment => [ Battery, Engine Compartment, Disconnecting and Connecting ] See: Service and Repair/Removal and
Replacement/Battery, Engine Compartment, Disconnecting and Connecting
Battery in luggage compartment => [ Battery, Luggage Compartment, Disconnecting and Connecting ] See: Service and Repair/Removal and
Replacement/Battery, Luggage Compartment, Disconnecting and Connecting
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Measure voltage between battery posts.
‹› Battery is OK if measuring instrument reading is 12.5 V or above.
‹› The battery no-load voltage must at no time be less than 12.5 Volts, otherwise the battery must be recharged immediately => [ Battery, Charging ]
See: Service and Repair/Procedures/Battery, Charging.
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Repeat voltage measurement between terminals.
‹› Battery no-load voltage must not be less than 12.5 Volts.
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If no-load voltage is not OK, replace battery.
Install in reverse order of removal, noting the following:
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Reconnect battery. Required steps:
Battery in engine compartment => See: Service and Repair/Removal and Replacement/Battery, Engine Compartment, Disconnecting and
Connecting
Battery in luggage compartment => See: Service and Repair/Removal and Replacement/Battery, Luggage Compartment, Disconnecting and
Connecting