A8 Sedan V8-3.7L (AEW) (1997)
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Ignition Coil: Testing and Inspection
Ignition Coils, Checking
Ignition Coils, Checking
Checking primary connections and voltage supply
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Fuses for ignition coils OK (located in E-box in plenum)
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Remove bracket along with ignition coil power output stages -N122- and -N192-.
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Disconnect both 4-pin harness connectors.
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Switch ignition on.
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Connect one lead of VAG1527B LED voltage tester to engine Ground. Connect other lead in sequence to check for voltage at each pin of both
4-pin connectors.
LED must light up for all 8 terminals.
NOTE: The measurement is the voltage supply through the primary circuit of the applicable ignition coil to the power output stage.
If LED does not light for one terminal:
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Disconnect 3-pin harness connector from applicable ignition coil.