Ignition Coil: Testing and Inspection

CHECKING IGNITION COIL
^ "Ignition Output 1," "Ignition Output 2" or "Ignition Output 3" displayed by VAG 1551 On Board Diagnostic (OBD) program (function 02, Check DTC Memory).
^ Camshaft Position (CMP) Sensor OK.
^ Carry out electrical testing, test steps 2 and 24.
^ Check voltage supply to Ignition Coil (N152) only if the engine will not start.

CHECKING VOLTAGE SUPPLY
- Disconnect 5-pin connector from Ignition Coil.



- Connect Fluke 83 hand multimeter (US 1119 or equivalent) to measure voltage across connector terminals -1- and -5-, using cables from VAG 1594 adapter kit.
- Switch ignition ON.
- Multi meter should read 10 Volts (minimum).
- Switch ignition OFF.

CHECKING ACTIVATION
- Remove fuse 18 (S18).
- Connect VAG 1527B voltage tester (LED test light) to connector terminals -5- and -2-, using cables from VAG 1594 adapter kit.
- Operate starter and check ignition signal from Motronic Engine Control Module (ECM) (J220).

NOTE: LED must flicker.

- Repeat the test twice more, with the voltage tester connected to terminals -5- and -3-, then -5- and -4-.
- If LED does NOT flicker, replace Motronic Engine Control Module.