The 75 and ZT Owners Club Forums - MG ZT 2004 Facelift Diesel not starting. Help Please!

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- - MG ZT 2004 Facelift Diesel not starting. Help Please! (https://www.the75andztclub.co.uk/forum/showthread.php?t=311812)

Quote:

Originally Posted by Atlan (Post 2875303)

Do you also have an electrical fault with the injector loom? Check circled area at 3.01 in video clip.

Hi Atlan.
Yes it seems so as it's sparking, maybe it is not pushed fully home ?

75driver - Thanks for the link. I've particularly noted

Quote:

"Below is a picture of the underbonnet fusebox with the main relay removed

free image hosting api
Terminal 86 and Terminal 87 should be at 12v irrespective of ignition position.

Terminal 30 should have continuity to pin one of connector one on your ECU Yellow/red

Terminal 85 should have continuity to pin nine of connector one Black/Pink

Having looked at the diagrams, I'd be prepared to lay money that the connection between T85 and pin nine is open circuit."

On measuring across the relay coil, I get 12v. Relay connections 85 and 86.
But 86 to 87, I get nothing.

I didn't get to buzzing out the lines to the ECU.

On an interesting note, when the relay is unplugged, there is not a light pump sound buzzing at the front left of the engine bay. When plugged in, I can hear the buzz.

Quote:

Atlan Do you also have an electrical fault with the injector loom? Check circled area at 3.01 in video clip

- I'll check this on return of daylight!

Thanks Big Russ. There's corrosion around some components, it would be interesting to look at that in more depth. I'll buzz out the lines and take it from there!

Trikey - I'm hoping to understand a little bit more about what the ECU is supposed to be doing and what it is doing before writing it off!

Cheers,

Paul.

Quote:

Originally Posted by Atlan (Post 2875303)

Do you also have an electrical fault with the injector loom? Check circled area at 3.01 in video clip.

Originally Posted by Arctic View Post

Quote:

Hi Atlan.
Yes it seems so as it's sparking, maybe it is not pushed fully home ?

Rover 75 / MG ZT Diesel Solenoid Connector Spark

I've just re-watched the video at that time and there's a clear issue with the connector there.. I'll take them all off and clean / reseat!
Good spot! Diesels aren't supposed to have "spark(ing) plugs!" :}

Paul.

I'll write up shortly, and there's more to do, but we have life!
https://youtu.be/A9rLaVXyIlE

Quote:

Originally Posted by PaulE (Post 2875626)

I'll write up shortly, and there's more to do, but we have life!
https://youtu.be/A9rLaVXyIlE

Well done.--:bowdown:--Is that with the same ECU ??

Quote:

Originally Posted by COLVERT (Post 2875662)

Well done.--:bowdown:--Is that with the same ECU ??

Cheers, achieved only with the help of this awesome community!

It is the same ECU. I did clean off most of the water marks. Once cleaned and resynchronised with the EWS Immobiliser module, and I had cleaned up the solenoid valve (injector ;) ) connectors, it sprang into life straight away.

TOAF did the resynchronisation. It didn't work the first time, but pressing start, stop, key out, key in, the resynchronisation worked!

No electrical work was required on the ECU, so lucky!

Needless to say, our other Rover 75s and MG ZTs have now had their plenum drains checked!