A8 Sedan V8-3.7L (AEW) (1997)
Ignition Coil: Testing and Inspection
Ignition Coil Power Output Stages, Checking
Ignition Coil Power Output Stages, Checking
Checking Actuation
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Remove bracket along with ignition coil power output stages -N122- and -N192- (arrows).
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Disconnect all fuel injector harness connectors and hold-downs.
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Disconnect 5-pin connectors (from ECM) from both power output stages.
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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 terminals 1, 2, 4 and
5 of each 5- pin connector.
For each test (at each connector terminal):
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Briefly operate starter motor.
LED must flash each time.
If LED does not flash:
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Connect VAG1598/19 test box to Engine Control Module (ECM) harness connector. Refer "Scan Tool Testing/Scan Tool Connecting and Initial
Checks/VAG1598/19 Test Box, Connecting" See: Computers and Control Systems/Testing and Inspection