TT Coupe L4-1.8L Turbo (AWP) (2005)
Ignition Coil: Testing and Inspection
Ignition Coils With Power Output Stage, Checking
Ignition Coils With Power Output Stage, Checking
Recommended Special Tools, Workshop Equipment, Testers, Measuring Instruments and Auxiliary Items
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V.A.G 1526 portable multimeter or V.A.G 1715 multimeter
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V.A.G 1527 voltage test lamp
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Adapter set V.A.G 1594
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Wiring diagram
Test Conditions
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Corresponding ignition coil fuses must be OK
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Fuel Pump (FP) Relay -J17- must be OK, check
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Battery voltage must be at least 11.5 V.
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All electrical consumers such as, for example, lights and rear window defroster must be switched off.
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The parking brake must be applied, otherwise the daytime running lights are switched on.
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If the vehicle is equipped with an air conditioning system, this must be switched off.
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The Ground (GND) connections between engine and body must be OK.
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Engine Speed Sensor must be OK, checking. See: Computers and Control Systems/Engine Speed Sensor/Testing and Inspection/Engine Speed
Sensor, Checking
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Camshaft Position (CMP) Sensor must be OK, checking. See: Camshaft Position Sensor/Testing and Inspection/Camshaft Position Sensor,
Checking
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Ignition switched off.
Test Sequence
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Disconnect 4-pin connector -1 - at ignition coil - 2 -.
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Measure supply voltage between terminals 1 + 2 and 1 + 4 of disconnected connector using the multimeter and adapter cables from V.A.G 1594.
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Switch ignition on.
Specification: at least 11.5 V
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Switch off ignition.
If no voltage is present:
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Check for open circuit in wire between 4-pin connector terminal 1 and relay carrier according to wiring diagram.
Wiring resistance: max. 1.5 Ohms
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Check wires between 4-pin connector and Ground (GND) for open circuit according to wiring diagram.
Terminal 2 and Ground (GND)
Terminal 4 and Ground (GND)
Wiring resistance: max. 1.5 Ohms
If there is no malfunction in the voltage supply:
Check Activation
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Remove fuel injector voltage supply fuses (this prevents engine from starting).
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Using adapter cables from connector test kit V.A.G 1594, connect voltage tester V.A.G 1527 to terminals 2 + 3 of disconnected connector.