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Hardware features

  • knock detection module
  • build-in WBO
  • Two auxiliary low side outputs
  • A/C toggle switch
  • A/C relay control

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Technical Details

schematic rev C Interactive iBom rev C

schematic rev D Interactive iBom rev D

Pinout

Forum DEVELOPMENT thread

https://github.com/rusefi/rusefi/wiki/It's-complicated

Mazda Miata 2003 Mazdaspeed Miata 2005

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Jumpers (Applies to board version 72a-72c so far)

in order to run a Miata NB test vehicle:

External MAP vs more ignition channels: a) if you are going to use an external MAP, then remove "R5 (IGN5)", "R7 (IGN6)" and "R11 (IGN8)"

b) or if you NOT using an external MAP (either internal MAP or external MAF, or alpha-N), then remove "R6 (GND)" and "R8 (+5V)"

Warning! The board can be damaged if you skip this step!

External WBO vs more ignition channels: if you want to use an external WBO (AFR) sensor, then remove "R1 (IGN7)"

Miata vehicle type: a) if you have a Miata 2002 (where we measure the battery voltage from 4T=alternator), then remove "R9 (2003)"

b) or if you have a Miata 2003 (where we measure the battery voltage from 4S=ign.switch), then remove "R10 (2002)"

OEM harness add-ons

The OEM ECU connector uses AMP Multilock .040 and .070 pins.

Board stm32 pin
4U MAP Manifold absolute pressure analog signal from external sensor
4K +5v +5v feed for MAP sensor
3Z GND Sensor & USB ground

Proto Area Pinout

Proto stm32 pin
EXT_SPI_SCK
UART_RX PD6
UART_TX PD5
EXT_IO1 PB12
EXT_IO2 PB13

rev C Reference image of jumpers set for external MAP sensor on 2003 miata

See Hellen-WBO

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