94 ex coupe/d15b -- No power to ECU
08-07-2011, 04:25 PM
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94 ex coupe/d15b -- No power to ECU
I have no ecu power but i did a wires tuck and changed up alot of things.. question is what grounds do i need to check to make sure ecu is grounded right.. when i turn koeo position II get srs light but no check engine light at all..
Last edited by Former User; 08-13-2011 at 08:38 AM. Reason: Thread clean up
08-07-2011, 04:28 PM
#2
Re: ECU has no power
sorry to jump on thread like this but im having same problem right now.... no ecu power but i did a wires tuck and changed up alot of things.. question is what grounds do i need to check to make sure ecu is grounded right.. when i turn koeo position II get srs light but no check engine light at all..
The important ground is on the thermostat housing. What car/engine?
Last edited by Former User; 08-13-2011 at 12:34 PM.
08-07-2011, 04:40 PM
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08-07-2011, 04:42 PM
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08-07-2011, 04:47 PM
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08-07-2011, 04:51 PM
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Re: ECU has no power
also right now i dont have a power wire going to the start itself the one with the 12mm nut on it... im not sure but do i need that power wire there for ecu to turn on... basically right now trying to make sure all wires are right and get fuel right now..
Last edited by Former User; 08-13-2011 at 12:36 PM.
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08-07-2011, 04:52 PM
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08-07-2011, 04:53 PM
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Re: ECU has no power
i have power coming off alternator white thick wire from main engine harness and power from battery.. going to two slots on engine fuse box
Last edited by Former User; 08-13-2011 at 12:37 PM. Reason: needed to add more information
08-07-2011, 04:58 PM
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Re: ECU has no power
i just pulled fuses out and checked to make sure not blowned...but im gonnna have to wait till torm.. cause i dont have my DMM on me or a test light.. there both at work.. to check if i am getting power throught them
Last edited by Former User; 08-13-2011 at 12:38 PM.
08-08-2011, 01:51 PM
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Re: ECU has no power
Last edited by Former User; 08-13-2011 at 12:39 PM.
08-13-2011, 07:37 AM
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08-13-2011, 07:39 AM
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Re: ECU has no power
2) Did you measure voltage on BOTH of the top test tabs of each fuse?
Last edited by Former User; 08-13-2011 at 12:41 PM.
08-13-2011, 07:51 AM
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Re: ECU has no power
Yes both test tabs and I might be getting 9v cause I'm running off a charger no battery. Let me turn it up... N see what voltage I get and also. On my EFI relay. Getting 9v through it on almost every tab expect the last two no voltage. If u went from top left to right then down. Left to right.
Last edited by Former User; 08-13-2011 at 12:41 PM.
08-13-2011, 07:59 AM
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Re: ECU has no power
here is pic of efi and how im talking about left to right on top to bottom..becuase the one u put up for that guy does not match mind.. the push part of the clip to pull it out of harness is in different spot...
Last edited by Former User; 08-13-2011 at 12:42 PM.
08-13-2011, 08:04 AM
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Re: ECU has no power
ok with 12v in the two fuse u wanted me to check and voltage at efi relay... and still not getting ecu light on.. and no power to fuel pump... do i have a bad EFI relay?
Last edited by Former User; 08-13-2011 at 12:42 PM.
08-13-2011, 08:19 AM
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Re: ECU has no power
you know what i just realized i was checking over one of ur link that says test fuses and i was reading through a troubleshooting for ecu symptoms.. and i had the ecu ground and the inside car grounds right and voltage in side car to ecu fuse and efi relay but still no check engine light on.. so i went on double check my ground on theromstat houseing.. and it was correct.. but i do not have my back mount on or the back mount bracket on. just right and left side motor mounts on. so i was thinking the motor is not grounded at all. so ecu cant be grounded cause the bolts to mounts are running to rubber.. so long story short... i ran the tranny ground to the frame rail.. and then turned koeo P(II). still no check engine light.. but my EFI relay is making a loud triggering noise, like loud clicking sounds.. Should i just got get a new one.. i dont want to solder it really..
Last edited by Former User; 08-13-2011 at 12:43 PM.
08-13-2011, 08:23 AM
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Re: ECU has no power
also.. so efi is making weird sound... just saw im getting fuel now.. got a mess in the garage.. efi sound is so loud didnt hear pump turn on..but definitly fuel coming out of line... only problem is i still dont have check engine light at all turn on just SRS light... maybe my bulb is bad on tech?
Last edited by Former User; 08-13-2011 at 12:43 PM.
08-13-2011, 08:29 AM
#20
Re: ECU has no power
Check whether the CEL bulb has been removed or is blown. When fixed, then check for CEL codes. But don't proceed with more tests until your battery is fully charged.
Last edited by Former User; 08-13-2011 at 12:44 PM.
08-13-2011, 08:32 AM
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Re: ECU has no power
alright will do .. yeah i need to go head and put battery back in car and charge it and also put my other mount on and bracket so i get good grounds off that too... ill be back soon thanks for all ur help...
Last edited by Former User; 08-13-2011 at 12:44 PM.
08-13-2011, 08:37 AM
#22
94 ex coupe/d15b -- No power to ECU
To avoid confusion and a major thread jack, I have turned your posts into your own thread.
Last edited by Former User; 08-13-2011 at 09:50 AM.
08-13-2011, 08:41 AM
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