Ignition Coil: Testing and Inspection

CHECKING IGNITION COIL
- Disconnect ignition wire and harness connector from ignition coil.
- Switch Fluke 83 multimeter to resistance range.





- Connect multimeter between ignition coil terminals 1 and 15 using jumper wires from VW 1594 adaptor kit.
- Measure primary resistance.

^ Specification: 0.5 to 0.7 Ohms

- Connect multimeter between terminals 4 and 15.
- Measure secondary resistance.

^ Specification: 3000 to 4000 Ohms

- If NO:

- Replace ignition coil N152 and power output stage N157.
- Repeat test.

CHECKING POWER OUTPUT STAGE

Requirements
^ Electrical check, Test steps 6 or 23 OK.
^ Ignition coil OK.

Checking Voltage Supply
- Remove 3-pin connector from ignition coil.
- Switch Fluke 83 multimeter to 20 Volt range.





- Connect multimeter between terminals 1 and 3 of connector using jumper wires from VW 1594 adaptor kit.
- Switch ON ignition.

NOTE: Must be approximately battery voltage.

- Switch OFF ignition.

Checking Triggering
- Disconnect cold start valve harness connector.
- Disconnect fuel injector harness connector at fuel rail.





- Connect VAG 1527B LED tester between terminals 2 and 3 of connector 4 using adaptor VW 1594/15 from adaptor kit VW 1594.
- Operate starter and check ignition signal from Engine Control Module (ECM).

NOTE: LED tester must flicker.

- If NO:

- Check Camshaft Position (CMP) sensor.

- If Camshaft Position sensor OK:

- Replace ECM J169.
- Connect 3-pin harness connector and ignition wire to ignition coil.





- Connect VAG 1527B LED tester between terminals 1 and 15 of ignition coil using jumper wires from VW 1594.

WARNING: Electrical shock hazard. DO NOT touch the ignition coil terminals or test connections during the following test.

- Switch ON ignition.
- LED tester must light up for 1 to 2 seconds.
- Operate starter.
- LED tester must flicker.
- If LED does not flicker:

- Replace ignition coil power output stage.