A4 Sedan V6-3.2L (BKH) (2007)
Battery: Component Tests and General Diagnostics
Battery No-Load Voltage - Vehicles With Energy Management Control Module, Checking
Battery Testing
Maintenance-free batteries must not be opened. Otherwise, the warranty is void.
Battery No-Load Voltage - Vehicles with Energy Management Control Module, Checking
‹› No-load voltage measurement for assessment of battery condition is only appropriate if it is not possible to test battery with any of the (VAS
505X) class testers.
‹› Measuring the no-load voltage, e.g. within the prescribed maintenance and service work on vehicles in storage, determines if the battery must be
recharged => Maintenance Tables.
Special tools, testers and auxiliary items required
‹› Multimeter (VAG 1526C), Multimeter (Fluke 83) or equivalent (VAG tester illustrated here for reference only).
To ensure correct measurements, follow prerequisites and procedure exactly as given:
Prerequisites
‹› Battery remains installed in vehicle. DO NOT disconnect battery ground cable.
‹› Open front hood or rear lid as appropriate for access to battery terminals.
‹› Manually place rear lid lock in "Closed" position to prevent illumination of luggage compartment lamp
‹› Manually close front hood switch where applicable to prevent activation of front hood alarm.
‹› Lock vehicle with remote control.
‹› Battery must not be discharged by electrical consumers within 2 hours prior to measurement.
‹› Battery must not be charged within 12 hours prior to measurement.
‹› Battery temperature must be at least -10 °C.
Procedure
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Perform any model-specific preparations necessary to gain access to battery terminals or battery jump-start terminals.
After a holding time of at least 2 hours:
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Use multimeter to measure voltage between battery terminals or between battery jump-start terminals as applicable.
‹› Specified value: 12.5 Volts or above = Battery OK.
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If no-load voltage is under 12.5 Volts, charge battery => [ Battery, Charging with Midtronics Diagnostic Conductance Charging Station INC-940 ]
See: Battery Charging.
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After charging for 5 minutes, perform load test => [ Battery, Load Testing with Midtronics Diagnostic Conductance Charging Station INC-940 ].
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If battery no-load voltage is below 11.7 Volts, battery is severely discharged.
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If no-load voltage is OK, reconnect battery.
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Follow measures required after reconnecting battery. =>
Starting and Charging See: