TT Quattro Roadster L4-1.8L Turbo (AMU) (2002)
Battery: Testing and Inspection
No-Load Voltage, Measuring
No-load Voltage, Measuring
Special tools, testers and auxiliary items
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Multimeter VAG 1526, or VAG 1526A, or Fluke 83, or Volt-Amp tester Sun VAT 40 (or equivalent).
WARNING:
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The battery plugs must be screwed in tightly when charging, measuring voltage or performing load tests.
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Ensure that following notes are observed otherwise correct measurements can not be guaranteed.
NOTE:
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If the no-load voltage measurement is carried out with the battery installed in the vehicle, the Ground strap MUST be disconnected.
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The battery must not be subjected to electrical load from connected equipment for at least 2 hours before taking the measurements.
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The battery must not be charged for at least 2 hours before taking the measurements.
Check the battery voltage in a no load condition as follows:
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Switch off ignition.
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Disconnect Ground strap at battery.
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Test voltage between battery terminals.
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If the tester reads 12.5 Volt or above, then the battery is OK
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The battery no-load voltage must at no time drop below 12.5 V (Volt). If this is the case then recharge the battery immediately
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Test voltage between battery terminals again.
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The battery no-load voltage must not be less than 12.5 V
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If the battery no-load voltage is not as specified, install a new battery.