TT Quattro Coupe V6-3.2L (BHE) (2005)
Ignition Coil: Testing and Inspection
Ignition Coils With Power Output Stage, Checking
The following procedure is used to diagnose Ignition Coils with Power Output Stage N70, N127, N291, N292, N323, N324.
Special tools, testers and auxiliary items required
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Multimeter.
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Diode test lamp.
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Wiring diagram.
Test requirements
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The Motronic Engine Control Module (ECM) J220 fuses OK.
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Motronic Engine Control Module (ECM) Power Supply Relay J271 OK.
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Engine Speed (RPM) Sensor G28 OK.
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Camshaft Position (CMP) Sensor G40 OK.
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Battery voltage at least 12.5 volts.
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All electrical consumers such as, lights and rear window defroster, switched off.
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Vehicles with automatic transmission, shift selector lever into position "P" or "N".
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A/C switched off.
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Ground (GND) connections between engine/transmission/chassis OK.
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Ignition switched off.
Test procedure
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Perform a preliminary check to verify the customers complaint. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing
and Procedures/General Diagnosis
Start diagnosis
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Disconnect the Ignition Coils with Power Output Stage electrical harness connectors -1 through 6 - from the Ignition Coils with Power Output
Stage.
Checking voltage supply
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Switch the ignition on.
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Using a Multimeter, check the Ignition Coil electrical harness connector terminals 1 to 4 for voltage.
Specified value: battery voltage.
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Switch the ignition off.