81 lines
2.4 KiB
Markdown
81 lines
2.4 KiB
Markdown
# 2003 Mazda Miata
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[72 pin Connector](OEM-connectors#72-pin)
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See also [Mazda Miata 2003 alt](Mazda-Miata-2003-alt)
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For power see [Mazda Miata 2002 - Starting & Power](Mazda-Miata-2002#starting--power)
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![Connector Face](Images/NB2_Miata_ECU_Connectors_Drawing_rusEFI_harness.png)
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Coil three wire plug:
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middle wire GND
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pin closer to the engine is +12v
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pin further away from the engine signal
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[Hellen72 Interactive Pinout](https://rusefi.com/docs/pinouts/hellen/hellen72/)
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| desc | type | rusEFI harness |
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| ---------- | ------ | -------------- |
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| MAP signal | analog | blue |
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| AFR signal | analog | white |
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![Wiring Diagram](OEM-Docs/Mazda/2003_Miata/Mazda_miata_2003.png)
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Individual pages for printing:
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![Wiring Diagram](OEM-Docs/Mazda/2003_Miata/Mazda_miata_2003_page_1.png)
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![Wiring Diagram](OEM-Docs/Mazda/2003_Miata/Mazda_miata_2003_page_2.png)
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![Wiring Diagram](OEM-Docs/Mazda/2003_Miata/Mazda_miata_2003_page_3.png)
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## Automatic Transmission
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see [Mazda Miata 2001 - Automatic Transmission](Mazda-Miata-2001#automatic-transmission)
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![Wiring Diagram](OEM-Docs/Mazda/2003_Miata/Mazda_miata_2003_at.png)
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## Immobilizer
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NALDEC NC87 67 790 MAZDA MX5 EUNOS MK2 MK2.5 BURGLAR ALARM MODULE NC8767790 is not an immobilizer
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US immobilizer
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![Wiring Diagram](Images/2001_miata_immobilizer.png)
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## Wiper Motor
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![Wiring Diagram](Images/2003_miata_wiper_motor.png)
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## Charging
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![Wiring Diagram](Images/2003_miata_charging.png)
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## Air Conditioning
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![Wiring Diagram](Images/2003_miata_ac.png)
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See also [Mazda Miata 2002](Mazda-Miata-2002)
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## Starting & power
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In start or run ECU is powered from Engine Fuse 15A (behind left side of dash) via 4S. (This is different from 2002 - nothing on 4S in 2002)
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ECU controls main relay via 3H. (This is different from 2002 - nothing on 3H in 2002)
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ECU gets +12v from main relay output 4AF which is used as +12v source for VVT (4D) and IAC (2P).
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Fly-back diode - stripe facing +12 - is needed between VVT 4D (power, stripe side) and VVT control 4R.
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Fly-back diode - stripe facing +12 - is needed between IAC 2P (power, stripe side) and IAC control 2Q.
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See [http://rusefi.com/forum/viewtopic.php?f=3&t=906&p=25018l#p25018](http://rusefi.com/forum/viewtopic.php?f=3&t=906&p=25018l#p25018)
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For ignition key see [Mazda Miata 2002 - Starting & Power](Mazda-Miata-2002#starting--power)
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## Misc
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Two timing marks - the left one is TDC
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