No power to ECM

jperron · Jul 19th, 2006, 12:27 PM

I have a 1995 Altima- Car quit and will turn over but no spark. No power to the ECM - Relay is good. Any ideas?

LONDONDERRY · Jul 19th, 2006, 01:26 PM

[quote=jperron]I have a 1995 Altima- Car quit and will turn over but no spark. No power to the ECM - Relay is good. Any ideas?[/QUOTE

So the engine cranks but will not start or crank over right? Is the engine light on or did you scan the ECM for any stored codes, thats the first place I'd start. If there's no code then its an electrical or fuel issue. Check the battery and cables and starter, then check the fule pump. Like I said see if there's a code in the ECM, even if the engine light is not on.

Frank

jperron · Jul 19th, 2006, 01:29 PM

The ECM does not give any codes-when I try to interegate in the manual mode there is no flashing light.

LONDONDERRY · Jul 19th, 2006, 02:16 PM

Quote:

Originally Posted by jperron

The ECM does not give any codes-when I try to interegate in the manual mode there is no flashing light.

Did you check the power transitor near the intake box and see if the battery has 12v? All so check the plug connections to the ECM. I doubt the EMC is bad

jperron · Jul 19th, 2006, 05:33 PM

Yes: My next approach is to see if the power is coming to the unit at the relay plug.

PS Haynes manual for power transistor check is wrong-web site said different(opposite) and went to BAP and tested a new one and got the same meter reading as the one in the car.