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'99 xj AX-15 swap electrical (OBDl to OBDll)

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'99 xj AX-15 swap electrical (OBDl to OBDll)

Old 04-07-2016, 05:12 PM
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Question '99 xj AX-15 swap electrical (OBDl to OBDll)

bought a ax-15 and supporting hard parts(t-case, cross-member, driveshafts, pedals, ect.) from a guy on craigslist in hopes of dropping it in place of the aw4 in my '99.
the trans is from a '95 so i didn't bother getting electrical parts because i knew they wouldn't work.
looking for some information on the ECM and getting it to work, can i keep my auto computer and fool it into thinking everything is copacetic or do i need a ax-15 ecm?
I don't really care about the CEL but i read on some other forums that the timing advance is different between auto and manual.
If i need a new ecm how closely does the replacement need to match my part#?
the parts i bought were the closest thing i could find to a donor vehicle so don't even say it.
Im quite skilled with electrical systems so i can modify the harness as necessary.

I just want to know what Im getting myself into before i go ahead with the swap and find out half way through that its impossible or extremely difficult

All information is appreciated, thank you
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Old 04-11-2016, 10:17 PM
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As far as OBD-II all 1997+ U.S. vehicles have it and the connector port under the dash, you should have it.

As far as I know there's no special ECM for the AX-15, it just matters for the engine.
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Old 04-12-2016, 04:12 PM
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Tps throws light because no aw4 signal any more. Auto and 5 speed different ecms.

Last edited by freegdr; 04-12-2016 at 04:16 PM.
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Old 04-13-2016, 02:32 PM
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Originally Posted by 94zj318 View Post
As far as OBD-II all 1997+ U.S. vehicles have it and the connector port under the dash, you should have it.

As far as I know there's no special ECM for the AX-15, it just matters for the engine.
There is a specific PCM for an OBD-II manual and it requires a couple extra wires as well when swapping. Auto PCM will run a manual but it will run a little off and throw a light.
Shop manual pin readouts would be helpful.
I wish I could answer more but I am in a meeting. Search under my name and there is a thread where I find out I am running a manual with an auto computer. It has part numbers
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Old 04-13-2016, 03:37 PM
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I got it backward thought he was putting a 99 in a 95. 99 shows part varies with factory equipment.
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