Passat Wagon L4-1781cc 1.8L DOHC Turbo (ATW) (2000)
Ignition Coil: Testing and Inspection
Ignition Coils With Power Output Stages, Checking
Special tools and equipment
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VAG 1598/31 adapter cable
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VAG 1526 multimeter or VAG 1715 multimeter
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VAG 1594 connector test kit
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VAG 1527 voltage tester
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Wiring diagram
Test requirements
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Battery voltage must be at least 11.5 volts.
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Camshaft Position (CMP) sensor must be OK, checking. See: Camshaft Position Sensor/Testing and Inspection
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Engine speed (RPM) sensor must be OK. See: Computers and Control Systems/Engine Speed Sensor/Testing and Inspection
Test sequence
I
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Engine code ATW
II -
Engine codes AUG, AWM
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Disconnect 4-pin connector -2- from ignition coil -1- to be checked.
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Measure supply voltage between terminals 1 + 2 and 1 + 4 of disconnected connector using the multimeter and adapter cables from the VAG 1594
connector test kit.
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Switch on ignition. Specification: at least 11.5 V
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Switch ignition off.
If there is no voltage:
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Check wire between 4-pin connector terminal 1 and relay carrier for open circuits according to wiring diagram. Wire resistance: max: 1.5 Ohms
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Check wires between 4-pin connector and Ground (GND) for open circuits according to wiring diagram. Terminal 2 and Ground (GND), terminal
4 and Ground (GND), wire resistance: max: 1.5 Ohms
If there is no malfunction in voltage supply:
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Check activation.
Checking activation