Need help ej22 ignition relay not triggering

7 posts · joined Aug 2015 · 8 Aug 2015, 5:52 pm

#1017528

I'm almost ready for first start up. Just cant get power to the ignition relay.
The trigger wire is not triggering when ignition key is on.
My harness was cut down by amauto.
Anyone have any ideas?

MR930 Wolfsburg Wizard

666 posts · joined Aug 2002 · 8 Aug 2015, 8:07 pm

#1017534

Is engine earthed to chasis?

richys green bug Learner Dubber

7 posts · joined Aug 2015 · 9 Aug 2015, 11:18 am

#1017541

Yes it definitely has a good earth to the motor.

mackaymanx Custom Title Time!

1,611 posts · joined Jan 2006 · 9 Aug 2015, 12:38 pm

#1017542

Have you earthed the ignition relay? The ignition relay has a different earth to the rest of the circuits in the Subaru loom, I don't know how Amauto do their looms. The ECU gets it earth from the engine earth on the manifold and actuates most circuits by taking them to earth but the ignition relay is different.

Quote of the week
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mackaymanx Custom Title Time!

1,611 posts · joined Jan 2006 · 9 Aug 2015, 12:53 pm

#1017544

D5, G1 or U1 ecu?

Quote of the week
"Do I wish to send them to you again, nope, no interest can't be bothered really, to much hassle for little or no return."

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richys green bug Learner Dubber

7 posts · joined Aug 2015 · 9 Aug 2015, 4:58 pm

#1017553

It's a U1ecu.
I just tried earthing the ignition relay...nothing.

I've looked at a few wiring diagrams and they all show that the light green trigger wire branches off to a diode (which is powered by the ignition key) before it goes to the ecu.

Mine has no diode just goes straight to the ecu. Could that be the problem?

When I get power to that trigger wire it all lights up (check light & fuel pump)

richys green bug Learner Dubber

7 posts · joined Aug 2015 · 9 Aug 2015, 5:03 pm

#1017554

I'll send some pics soon as I can work it out ☺

mackaymanx Custom Title Time!

1,611 posts · joined Jan 2006 · 9 Aug 2015, 6:13 pm

#1017558

Have not used a diode on the two U1 that I did.

Quote of the week
"Do I wish to send them to you again, nope, no interest can't be bothered really, to much hassle for little or no return."

[IMG]https://www.vw-mplate.com/mplate2-18600.png[/IMG]

richys green bug Learner Dubber

7 posts · joined Aug 2015 · 9 Aug 2015, 6:27 pm

#1017562

That's good to know. Thank you

josh702 Learner Dubber

14 posts · joined Mar 2011 · 9 Aug 2015, 7:05 pm

#1017567

Don't worry about the diode, hook up the relay trigger wire to a battery then other wire "ground" to the negative on the battery. This should energise the relay, if it doesn't id say the relay has failed.

Make sure the circuits your switching through the ignition relay have power, from memory they branch of a 30amp fuse all red wires into this relay and the fuel pump relay.

Have fun

richys green bug Learner Dubber

7 posts · joined Aug 2015 · 9 Aug 2015, 7:24 pm

#1017570

Awesome. I'll give it a go. Thanks a lot .

richys green bug Learner Dubber

7 posts · joined Aug 2015 · 10 Aug 2015, 4:51 pm

#1017608

Thanks to everyone for your suggestions. I've got it sorted now. After talking to Miles for two minutes telling me what wires to check, we found that one wire was damaged. The boys at Amauto really now their stuff.

Bone Officially Full-On Dubber

299 posts · joined Aug 2009 · 11 Aug 2015, 12:32 pm

#1017644

Come on Rich, hurry up with this thing!