# Wrong harness, ECU or engine?

**URL:** <https://forums.speedlife.net/t/wrong-harness-ecu-or-engine/145171>\
**Category:** Canada Nissan Automotive\
**Created:** [November 24, 2006, 11:01am UTC](https://forums.speedlife.net/t/wrong-harness-ecu-or-engine/145171 "2006-11-24T11:01:45Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![imported\_brian](https://avatars.discourse-cdn.com/v4/letter/i/b3f665/32.png) [@imported\_brian](https://forums.speedlife.net/u/imported_brian)\
**Post date:** [November 24, 2006, 11:01am UTC](https://forums.speedlife.net/t/wrong-harness-ecu-or-engine/145171/1 "2006-11-24T11:01:45Z")

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Well, I went to line up my ecu to my wiring harness but they dont even come close to plugging into eachother. now the harness has extra plugs allover, I know one is for AC, and another few are for the starter/aternator. but none line up with the tranny :rolleyes: the plugs for the ECU are the same as on my stock KA engine. do you think its the wrong harness? engine? or just the wrong ECU?

thanks,

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**Author:** ![RS13](https://avatars.discourse-cdn.com/v4/letter/r/46a35a/32.png) [@RS13](https://forums.speedlife.net/u/RS13)\
**Post date:** [November 24, 2006, 12:00pm UTC](https://forums.speedlife.net/t/wrong-harness-ecu-or-engine/145171/2 "2006-11-24T12:00:37Z")

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ok what engine, what type of car, Numebrs on the ECU, Maybe a picture would help

NEED MORE DETAILS

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**Author:** ![Variable](https://avatars.discourse-cdn.com/v4/letter/v/cab0a1/32.png) [@Variable](https://forums.speedlife.net/u/Variable)\
**Post date:** [November 24, 2006, 2:24pm UTC](https://forums.speedlife.net/t/wrong-harness-ecu-or-engine/145171/3 "2006-11-24T14:24:35Z")

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OBD1 Vs. OBD2 FTL ?

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**Author:** ![RS13](https://avatars.discourse-cdn.com/v4/letter/r/46a35a/32.png) [@RS13](https://forums.speedlife.net/u/RS13)\
**Post date:** [November 24, 2006, 4:49pm UTC](https://forums.speedlife.net/t/wrong-harness-ecu-or-engine/145171/4 "2006-11-24T16:49:31Z")

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> [@Variable](#):
>
> OBD1 Vs. OBD2 FTL ?

Nissan’s OBDII is besicly the same as OBDI. Not like those stupid honda’s.

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**Author:** ![Variable](https://avatars.discourse-cdn.com/v4/letter/v/cab0a1/32.png) [@Variable](https://forums.speedlife.net/u/Variable)\
**Post date:** [November 25, 2006, 1:54pm UTC](https://forums.speedlife.net/t/wrong-harness-ecu-or-engine/145171/5 "2006-11-25T13:54:58Z")

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Its actually not that different on a honda, but a honda OBD1 ECU will not plug into a OBD2 harness. The connectors don’t match.

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**Author:** ![imported\_brian](https://avatars.discourse-cdn.com/v4/letter/i/b3f665/32.png) [@imported\_brian](https://forums.speedlife.net/u/imported_brian)\
**Post date:** [November 26, 2006, 2:34am UTC](https://forums.speedlife.net/t/wrong-harness-ecu-or-engine/145171/6 "2006-11-26T02:34:59Z")

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Its an sr20. I sent the ECU back, hoping thats it. So I dont have a picture. OBD1 and OBD2 would cause this problem…I’m positive thats whats causing it. Just not sure if its the harness thats wrong, or the ECU

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**Author:** ![Variable](https://avatars.discourse-cdn.com/v4/letter/v/cab0a1/32.png) [@Variable](https://forums.speedlife.net/u/Variable)\
**Post date:** [November 26, 2006, 10:58pm UTC](https://forums.speedlife.net/t/wrong-harness-ecu-or-engine/145171/7 "2006-11-26T22:58:55Z")

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You can’t take my word for it I am still a noob when it comes to your cars. If only I knew where to look for information about the differances in Nissans… I could show you the difference in a honda in seconds.