93 lines
6.1 KiB
Markdown
93 lines
6.1 KiB
Markdown
# 1990 Mazda Miata
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[Frankenso Mazda Miata NA6 PnP](Frankenso-MazdaMiataNA6-pnp)
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1990 1.6 US
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Rusefi Engine Type 41 on Frankenso
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## Plug 1
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22 pin
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| pos | b pos | color | desc | type |
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| --- | ----- | ---------- | ------------------------------ | --------------- |
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| 1A | | | hot all times, Room Fuse | Input +12v |
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| 1B | | White/RED | Main relay | Input +12v |
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| 1C | | Violet | Ignition on | Input +12v |
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| 1D | | | | |
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| 1E | | YEL/BLK | Check Engine Light MIL | Output PD5 |
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| 1F | | | | |
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| 1G | W7? | | Igniter 1 & 4 | Output +5v PE14 |
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| 1H | W8 | | Igniter 2 & 3 | Output +5v PC7 |
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| 1I | | \* | \* | \* |
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| 1J | W10 | BLue/Black | A/C relay | ? |
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| 1K | | | diag connector mode switch TEN | |
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| 1L | | | N/C | |
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| 1M | | | N/C | |
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| 1N | | | | |
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| 1O | | | stop light switch | input |
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| 1P | | | Power Steering SW | |
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| 1Q | | | AC Thermo SW | |
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| 1R | W18? | BLK/GRN | A/C Extra Cooling Fan Relay | |
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| 1S | | | Heater Control SW | |
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| 1T | | | | |
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| 1U | | | Tail Fuse | |
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| 1V | | | | |
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*** "On a 1990 - 1993 Miata, there are three coolant sensors." "On the top of the thermostat housing at the front of the engine is the 'Water Thermoswitch,' a single-wire sensor that turns the fan on when coolant temperature reaches 207°F (97°C)." "At the rear of the cylinder head is the 'Water Thermosensor.' which sends temperature info to the ECU to help it set A/F ratio."
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## Plug 3
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26 pin
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| pos | b pos | color | desc | type |
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| --- | ----- | ---------------- | ---------------------------- | ------------------------------------- |
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| 3A | W39 | | | Ground |
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| 3B | W40 | | | Ground |
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| 3C | W41 | | | Ground |
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| 3D | W42 | | | Ground |
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| 3E | | White | Crank angle \#1 | Input PC6 |
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| 3F | | \* | \* | \* |
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| 3G | | Yellow/BLue | Crank angle \#2 | Input, PA5 |
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| 3H | W46? | | MAP | Inp10 PA6 |
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| 3I | | | Tach Input | |
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| 3J | | \* | \* | \* |
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| 3K | W49 | LT GRN/RED | \+5 ref/TPS power | Output 5v |
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| 3L | W50 | LT GRN/WHT | M/T TPS switch | Analog input PA2 |
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| 3M | W51 | Red/Black | TPS signal (A/T) | Analog input |
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| 3N | W52 | Red/BLue | oxygen sensor | Input PC3 |
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| 3O | W53 | Red | VAF/MAF | |
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| 3P | W54 | Red/Green | IAT, intake air thermosensor | analog input, 2.7K pull-up, 3.6K? PC1 |
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| 3Q | W55 | BLue/White | CLT, water thermosensor | analog input, 2.7K pull-up, 3.6K? PC2 |
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| 3R | W56 | \* | \* | \* |
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| 3S | W57 | \* | \* | \* |
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| 3T | W58 | \* | \* | \* |
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| 3U | W59 | Yellow | injector (1&3) | Output/low side |
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| 3V | W60 | Yellow/Black | injector (2&4) | Output/low side |
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| 3W | W61 | BLue/Orange | Idle Speed Control valve | Output/low side |
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| 3X | W62 | White/Blue | purge solenoid valve control | Output |
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| 3Y | W63 | \* | \* | \* |
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| 3Z | | A/T control unit | | |
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See also [Mazda ECU Technical Data](https://sites.google.com/site/mazdaecutechnicaldata/)
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See you - some notes on stock ECU schematics (TinyCAD format) - [https://drive.google.com/file/d/0B7l1FeMZcfisM3pHanlkWFRGQVU/view?usp=sharing](https://drive.google.com/file/d/0B7l1FeMZcfisM3pHanlkWFRGQVU/view?usp=sharing)
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## Gauges
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Useful wires:
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CLT B/L Black/Blue
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Oil Y/A Yellow/?
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Turn signal Right G/W Green/White
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Turn signal Left G/B Green/Black
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See also [http://www.mellens.net/mazda/Mazda-Miata-1991-1993/1991_wiring.pdf](http://www.mellens.net/mazda/Mazda-Miata-1991-1993/1991_wiring.pdf)
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