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post #1 of 2 (permalink) Old 3rd June 2007 Thread Starter
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Glow Plug/heater Circuit "a" Malfunction

Hi all,

I keep having little issues with my Laguna. Because I cant seem to remove the "SERVICE" message from the computer display I had hte ECU checked and fount the following fault code listed.

Odd as I don't have any starting issues, the glow plug light is on for about 3 seconds and then the engine starts. No coughs, splutters or smoke. I do notice that its a bit lumpy when you put your foot down when its warm, but cold it goes like stink.

Any ideas?

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post #2 of 2 (permalink) Old 3rd June 2007
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Hi Nev - the glow plug system doesn't operate every time the engine starts - it will depend on the engine temperature, airflow temperature and ambient temperature. The ECU evaluates all these values and will not only control the glow plugs but also injection timing and fuel flow. As you mention the engine performs better when cold it could be you have a temperature sensor problem or there is also the possibilty of a faulty glow plug because if the electrical values in this circuit are above or below the norm the ECU can be fooled into thinking the engine is always cool. The glow plugs can be checked using a multi-meter measuring their resistance individually - and should read 0.6 ohms - you will need to disconnect their feed cables during testing - it also may be worth checking the ambient temperture sensor in the dor mirror.
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circuit , glow , malfunction , plug or heater

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