[Knotvillage]

I have have a i30 and when i turn on the ignition the glowindicator only lights up for about 1 sec. I have changed the relay on the right fender. There is another relay that click under the dashboard. When that click the glowindicator turns OFF.

[tw2005]

I have have a i30 and when i turn on the ignition the glowindicator only lights up for about 1 sec. I have changed the relay on the right fender. There is another relay that click under the dashboard. When that click the glowindicator turns OFF.

SO what's the question? Just because the indicator goes out does not mean ithas stopped glowing. Have yo placed a volt meter on the connector to the glow plug buss bar to see what voltage is present and for how long after the key is initially turned to on?

[Knotvillage]

The plugs have power about the same time. 1-2 seconds. There must be some sort of timerelay.

[tw2005]

The plugs have power about the same time. 1-2 seconds. There must be some sort of timerelay.

There is, but I've never worked it all out. I know on mine it stays lit for a few seconds  but can have power still applied up to 30 seconds and is temperature dependant.

I'll have a read, It has a big fusible link but have you also checked resistance in the circuit?

[tw2005]

It reckons it should stay lit for 6 seconds, and stays powered for another 30 seconds, 36 seconds in total and that's with a coolant temp of 20C

[tw2005]

It says when the voltage or continuity time is not normal, check terminal voltage in glow control unit and single parts. Interesting wording, could be more specific.

[tw2005]

All I see circuit wise is the ECM that drives the Glow Plug Relay which would be in the engine bay

[tw2005]

The main relay is also in the engine bay, I wonder what relay inside You are hearing?

[tw2005]

And the glow time lamp indicator comes straight from the ECM to the cluster.

[Knotvillage]

I Aldo wonder what that i. When i turn on the ignition it click and after 1-2 seconds it click again and the glowindicator turns off. So the CEM decides the time of the glow?

[tw2005]

I Aldo wonder what that i. When i turn on the ignition it click and after 1-2 seconds it click again and the glowindicator turns off. So the CEM decides the time of the glow?

That's the impression I get based on the Engine coolant sensor. It does not go into it in great detail on any safety circuits.

Not sure if checking the  temp sensor will reveal anything. Could it be a bad ECM? I have no answers for you.

[nzenigma]

And the glow time lamp indicator comes straight from the ECM to the cluster.

Been having same conversation

  Long Crank on Cold Start.

Probable verdict = ECM,  circuit and cheap remedy provided.