A4 Quattro Cabriolet V6-3.2L (BKH) (2007)
Battery: Component Tests and General Diagnostics
Battery No-Load Voltage - Vehicles Without Energy Management Control Module J644, Checking
Battery No-load Voltage - Vehicles Without Energy Management Control Module J644, Checking
NOTE: 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
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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
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If no-load voltage on battery installed in vehicle is measured, disconnect ground cable.
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Battery must not be discharged by electrical consumers within 2 hours prior to measurement.
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Battery must not be charged within 12 hours prior to measurement.
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Battery temperature must be at least -10 degrees C.
Procedure
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Disconnect battery ground cable.
After a holding time of at least 12 hours:
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Use multimeter to measure voltage between battery terminals.
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Specified value: 12.5 Volts or above = Battery OK.
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If no-load voltage is under 12.5 Volts, charge battery.
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After charging for 5 minutes, perform load test .
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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.