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Home › Volkswagen › 2000 › Jetta GL, 1.9 F, Standard › Repair and Diagnosis › Engine Performance › Ignition System › 1.9L - Fuel Injection Glow Plug, Engine Code: ALH (A4 Platform) › 28 Ignition/Glow plug system › Glow plug system, checking › Conditions

Glow plug system, checking: Conditions

Battery voltage 11.5 minimum.
Diesel direct injection system Engine Control Module J248 OK.
Glow plug strip fuse OK.