89 vert to turbo ecu
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From: Michigan
89 vert to turbo ecu
I have a 89 vert in working on turboing and I'm wondering can I just plug and play a n374 ecu (s5 turbo) or do I have to do a new wireing harness to make it work?
Information Regurgitator
Joined: Feb 2001
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From: Sparta TN. United States
IIRC you can use the S5 n/a harness but it will have to be modified. It plugs into the turbo ECU and most things are the same, but some connections will need to be extended to reach where they connect on the turbo engine. I think I had made a list of the differences and posted on here years ago. I will see if I can find it tomorrow and post a link to it.
Until then this thread explains what is needed to make the N/A harness work pretty well.
s5 na harness repin - RX7Club.com - Mazda RX7 Forum
Until then this thread explains what is needed to make the N/A harness work pretty well.
s5 na harness repin - RX7Club.com - Mazda RX7 Forum
Information Regurgitator
Joined: Feb 2001
Posts: 1,990
Likes: 208
From: Sparta TN. United States
I went ahead and found it
Took me awhile but here is what I could dechipher from my FSM. This is from my 1989 workshop manual from Mazda.
Differences are as follows:
Pin# 2M on N/A = VDI Control soleniod
Pin# 2M on TII = Knock Sensor.
So I would guess the wire that went to the VDI Solenoid gets connected or extended to connect to the knock sensor.
Pin# 3R on N/A = 6-port induction system(solenoid)
Pin# 3R on TII = Duty solenoid valve(Turbo boost pressure control) From the turbocharger control system section it looks like this is the solenoid that controls the wastegate valve actuator. I would guess same as above for wiring.
Pin# 1U on N/A = AT switch
Pin# 1U on TII = Mileage sensor #2 Don't know what to do about this one.
Pin# 3N on N/A = EC-AT Control(This is an output)
Pin# 3N on TII and MT N/A has no connection.
I would recommend comparing the FSM pages yourself as well to make sure I haven't overlooked something. Also I'm pretty sure this will not apply to 87-88 cars. Applies to 89-91 cars only.
Differences are as follows:
Pin# 2M on N/A = VDI Control soleniod
Pin# 2M on TII = Knock Sensor.
So I would guess the wire that went to the VDI Solenoid gets connected or extended to connect to the knock sensor.
Pin# 3R on N/A = 6-port induction system(solenoid)
Pin# 3R on TII = Duty solenoid valve(Turbo boost pressure control) From the turbocharger control system section it looks like this is the solenoid that controls the wastegate valve actuator. I would guess same as above for wiring.
Pin# 1U on N/A = AT switch
Pin# 1U on TII = Mileage sensor #2 Don't know what to do about this one.
Pin# 3N on N/A = EC-AT Control(This is an output)
Pin# 3N on TII and MT N/A has no connection.
I would recommend comparing the FSM pages yourself as well to make sure I haven't overlooked something. Also I'm pretty sure this will not apply to 87-88 cars. Applies to 89-91 cars only.
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