How to determine type of ECU ?
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Rotary Freak
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From: Slovenia, Europe
How to determine type of ECU ?
Anyone knows how I can determine whether my car has Cali or Non-Cali ECU ? (I live in Europe btw. 
)
Any visual signs, except looking at the numbers on the ECU ? What should I look for (either visual signs or ECU number) ?
)Any visual signs, except looking at the numbers on the ECU ? What should I look for (either visual signs or ECU number) ?
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From: Islamabad, Pakistan
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From: Chch, New Zealand
Just adding to this with some more info regarding the JDM cars:
Emailed Mazda New Zealand with a query about my ECU code 'N3A8'. Got a very comprehensive reply (see attached images for more detail):
In summary:
1991-94:
N3A7 18 881A/B/C - 5 speed
N3A8 18 881A/B/C - AT
1995-?(probably upto 1998 or 99):
N3F1 18 881A/B/C - 5 speed
N3F2 18 881A/B/C - 5 speed
My 1992 Japanese model had a AT-MT conversion, but is still running the AT ECU (N3A8). I believe it still has the AT harness due to the jumper & custom wiring on the transmission connectors.
Mods, can we add a link to this thread on the FAQ please - there are alot of other threads asking about ECU codes, but most simply point to this thread.
Emailed Mazda New Zealand with a query about my ECU code 'N3A8'. Got a very comprehensive reply (see attached images for more detail):
In summary:
1991-94:
N3A7 18 881A/B/C - 5 speed
N3A8 18 881A/B/C - AT
1995-?(probably upto 1998 or 99):
N3F1 18 881A/B/C - 5 speed
N3F2 18 881A/B/C - 5 speed
My 1992 Japanese model had a AT-MT conversion, but is still running the AT ECU (N3A8). I believe it still has the AT harness due to the jumper & custom wiring on the transmission connectors.
Mods, can we add a link to this thread on the FAQ please - there are alot of other threads asking about ECU codes, but most simply point to this thread.
Jspec cars did not have EGR or AWS at all so their ECU is going to be different. On the opposite end of the spectrum, California spec cars had an additional EGR switch. US Fed spec is somewhere in the middle in terms of the emission controls.
hwned as disassembled a few different ECU's, he might be able to shed some additional light on this matter.
hwned as disassembled a few different ECU's, he might be able to shed some additional light on this matter.
Joined: Mar 2001
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From: https://www2.mazda.com/en/100th/
Jspec cars did not have EGR or AWS at all so their ECU is going to be different. On the opposite end of the spectrum, California spec cars had an additional EGR switch. US Fed spec is somewhere in the middle in terms of the emission controls.
hwned as disassembled a few different ECU's, he might be able to shed some additional light on this matter.
hwned as disassembled a few different ECU's, he might be able to shed some additional light on this matter.
93-94 ca and 94 federal cars have the egr with the sensor
95 cars have no egr, not sure what the difference is ca/fed something really minor
can we swap in a 93 fed ecu into a 94 and use a block off plate on the egr so no code 16 is thrown?
Joined: Mar 2001
Posts: 31,819
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From: https://www2.mazda.com/en/100th/
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