Passat Syncro Sedan V6-2771cc 2.8L DOHC (AHA) (1999)
Battery: Testing and Inspection
Battery With Charge Indicator (Magic Eye), Checking
Batteries With Charge Indicator (Magic Eye), Checking
Identification
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Battery housings are either black or white.
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Charge indicator -arrow- displays electrolyte level and charge condition.
Charge indicator, readings
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Green -> sufficient charge (and electrolyte level) OK
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Black -> no charge or insufficient charge
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Colorless or yellow -> critically low electrolyte level. Top up with distilled water immediately
NOTE:
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If the charge indicator on batteries in excess of 5 years old are colorless, DO NOT attempt to top and/or recharge battery. Battery must be
replaced.
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Air bubbles that occur normally during battery charging (even during vehicle operation) may adversely affect charge indicator reading. To obtain
an accurate reading, gently tap the charge indicator with a screwdriver handle or rock the vehicle in order to displace any possible air bubbles that
have formed.
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For technical reasons, some batteries are equipped with sealing plugs covered with plastic foil.
Visual check
Always carry perform a visual check of the battery before checking no load voltage, electrolyte specific gravity and load test.
Check for:
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Cracked battery case and resulting corrosion damage to surrounding area.
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Loose, damaged or corroded battery posts and terminals.
WARNING!
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Ensure that all battery post/terminal connections are securely installed and tightened according to the torque value.
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Intermittent contact at battery terminals may spark or cause electrical system malfunctions.
Battery Without Charge Indicator (Magic Eye), Checking
Batteries Without Charge Indicator (Magic Eye), Checking
Visual check
Always carry perform a visual check of the battery before checking no load voltage, electrolyte specific gravity and load test.