ECU from a 94 Crown transmission
10-09-2017, 04:34 AM
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ECU from a 94 Crown transmission
i beleave the 94 1UZFE with auto transmission from a Crown which has a separate transmission ECU
this has been installed into my ford 1948 F1 pick up. i need to replace the 94 engine with a 1999 1UZFE because of partial loss of power soon after warming up which has been unable to be solved by several mechanics.
how do i identify that indeed the transmission has a separate ECU so it can be retained in the swap.
help apreciated for a non mechanic.
this has been installed into my ford 1948 F1 pick up. i need to replace the 94 engine with a 1999 1UZFE because of partial loss of power soon after warming up which has been unable to be solved by several mechanics.
how do i identify that indeed the transmission has a separate ECU so it can be retained in the swap.
help apreciated for a non mechanic.
Last edited by briantutt62@gmail.co; 10-09-2017 at 04:44 AM.
10-21-2017, 06:07 PM
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Not sure if you found your answers somewhere else, but here's what I know:
The sure fire way to find the transmission ECU is to follow the wires. You'll see a bundle of wires coming out of the transmission - some will head to the shifter, and some will head to the ECU. So follow all the wires and you'll eventually find it. I would think that if there is a separate trans ECU, the guy who did the swap would have mounted it right next to the engine ECU.
Now, I see a little problem with your plan - the 98-2000 1UZ has VVTI and uses a 5 speed auto transmission - as opposed to your early 1UZ which is non-VVTI and uses a 4 speed auto. The VVTI engines do not have a separate transmission ECU. In short, a 99 engine won't play nice with your 94 trans. You'll want to swap in another early engine as a replacement, or change everything over (engine, trans, ECU) to the later version. Be aware that the later version also uses an immobilizer.
The sure fire way to find the transmission ECU is to follow the wires. You'll see a bundle of wires coming out of the transmission - some will head to the shifter, and some will head to the ECU. So follow all the wires and you'll eventually find it. I would think that if there is a separate trans ECU, the guy who did the swap would have mounted it right next to the engine ECU.
Now, I see a little problem with your plan - the 98-2000 1UZ has VVTI and uses a 5 speed auto transmission - as opposed to your early 1UZ which is non-VVTI and uses a 4 speed auto. The VVTI engines do not have a separate transmission ECU. In short, a 99 engine won't play nice with your 94 trans. You'll want to swap in another early engine as a replacement, or change everything over (engine, trans, ECU) to the later version. Be aware that the later version also uses an immobilizer.
11-01-2017, 06:43 PM
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thanks helped a lot with making up my mind.
i am considering a C4 ford to the 99 1UZ as the 94 1UZ has some problem as poor power after warming up.
however i will chase the TCU when i pull the 94 and transmission out as a learning exercise.
cannot waist the knowledge gained.
i am considering a C4 ford to the 99 1UZ as the 94 1UZ has some problem as poor power after warming up.
however i will chase the TCU when i pull the 94 and transmission out as a learning exercise.
cannot waist the knowledge gained.
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