Ignition circuits 1 and

Check the function

1. Measure the CO and HC values with the engine at operating temperature and both ignition circuits in operation.

2. Switch off the engine and disconnect the plug from the final stage of ignition circuit I.

3. Start the engine and measure the CO and HC values.

4. Switch off the engine, connect the plug for ignition circuit I and disconnect the plug from the final stage of ignition circuit II.

5. Start the engine and measure the CO and HC values.

The CO and HC values must not deviate considerably when the engine is running with only one ignition circuit.

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