ECM Relay Symptoms - No Start HELP PLESE

Reply Subscribe

Thread Tools

Search this Thread

Sep 3, 2013 | 04:04 PM

LakeTahoeQuattro

Thread Starter

AudiWorld Member

Joined: Jan 2013

Posts: 97

Likes: 2

From: Lake Tahoe NV

ECM Relay Symptoms - No Start HELP PLESE

When I turn the key the instrument cluster and electrical systems work and I can hear air compressor on my allroad.

I turn the key to crank the engine and the whole car shuts off including the instrument cluster. No power what so ever

I am reading 2.8 volts on several terminals under the knee bolster after this happens. ~12V prior to starting. I need to let the car sit for a while before power is restored.

Could this be the ECM relay?

I called several dealers and they say many different answers. Any ideas?

Last edited by LakeTahoeQuattro; Sep 9, 2013 at 04:14 PM.

Sep 4, 2013 | 02:45 AM

4Driver4

Tech Guru

Joined: Oct 2002

Posts: 34,430

Likes: 130

Alternator?

Sep 4, 2013 | 07:10 AM

SloopJohnB@mac.com

Tech Guru

Joined: Oct 2002

Posts: 8,009

Likes: 191

From: Olney, MD

Ignition switch?

Sep 9, 2013 | 04:02 PM

LakeTahoeQuattro

Thread Starter

AudiWorld Member

Joined: Jan 2013

Posts: 97

Likes: 2

From: Lake Tahoe NV

ECM Relay Symptoms - No Start HELP PLESE - FIXED

Battery cable was not tightened down on terminal. This caused an arc when trying to start. Dumb mistake but very pleased this was the problem!! Thanks

Last edited by LakeTahoeQuattro; Sep 9, 2013 at 04:15 PM.

Sep 10, 2013 | 10:17 AM

SloopJohnB@mac.com

Tech Guru

Joined: Oct 2002

Posts: 8,009

Likes: 191

From: Olney, MD

Quote:

Originally Posted by LakeTahoeQuattro

Battery cable was not tightened down on terminal. This caused an arc when trying to start. Dumb mistake but very pleased this was the problem!! Thanks

Oldie but a goodie....similar thing happened to lady next door's chevy van.....new battery, didn't start it for a month or so...dead. Charged battery, tightened terminals...no problem!