116 lines
3.6 KiB
Markdown
116 lines
3.6 KiB
Markdown
# Hellen NB2
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[Download release firmware](https://github.com/rusefi/rusefi/releases/latest/download/rusefi_bundle_hellen72.zip)
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[Snapshot firmware bundle](https://rusefi.com/build_server/rusefi_bundle_hellen72.zip)
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[Issue Tracker](https://github.com/rusefi/hellen-NB2-issues)
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## Hardware features
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* knock detection module
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* built-in WBO
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* Two auxiliary low side outputs
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* A/C toggle switch
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* A/C relay control
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## User Support
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[Click here for Support overview](Support)
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## Technical Details
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[schematic rev F](Hardware/Hellen/hellen72_NB2-f-schematic.pdf)
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[Interactive iBom rev F](https://rusefi.com/docs/ibom/hellen72_NB2-f-ibom.html)
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[schematic rev E](Hardware/Hellen/hellen72_NB2-e-schematic.pdf)
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[Interactive iBom rev E](https://rusefi.com/docs/ibom/hellen72_NB2-e-ibom.html)
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[schematic rev D](Hardware/Hellen/hellen72-d-schematic.pdf)
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[Interactive iBom rev D](https://rusefi.com/docs/ibom/hellen72-d-ibom.html)
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[schematic rev C](Hardware/Hellen/hellen72-c-schematic.pdf)
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[Interactive iBom rev C](https://rusefi.com/docs/ibom/hellen72-c-ibom.html)
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[rev F Pinout]
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[rev C-E Pinout](https://rusefi.com/docs/pinouts/hellen/helen72/)
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[Forum DEVELOPMENT thread](https://rusefi.com/forum/viewtopic.php?f=4&t=1947)
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[It's Complicated](It's-complicated)
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[Mazda Miata 2003](Mazda-Miata-2003) [Mazdaspeed Miata 2005](Mazdaspeed-Miata-2005)
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## Options Port (rev F)
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Using 28 Pin [Connector](https://www.bmotorsports.com/shop/product_info.php/products_id/5655?osCsid=cs48b6aap1pgdvt9vgn1889sq0)
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| Pin | Type | Comments |
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| 5P | PPS1 | Pedal Position Sensor Input 1 |
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| 5R | TPS1 | Throttle Position Sensor Input 1 |
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| 5S | TPS2 | Throttle Position Sensor Input 1 |
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| 5T | PPS2 | Pedal Position Sensor Input 2 |
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| 5Z | WBO Vs/Ip | LSU 4.9 Pin 2 |
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| 5AA | WBO Vs | LSU 4.9 Pin 6 |
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| 5AB | WBO R Trim | LSU 4.9 Pin 5 |
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| 5AC | WBO Ip | LSU 4.9 Pin 1 |
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| 5AD | WBO Heater - | LSU 4.9 Pin 3 |
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| 5AE | +12v | LSU 4.9 Pin 4 |
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*ETB+ and ETB- are on ECU PCB
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## Jumpers (Applies to board version 72a-72c so far)
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in order to run a Miata NB test vehicle:
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External MAP vs more ignition channels:
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a) if you are going to use an external MAP, then remove "R5 (IGN5)", "R7 (IGN6)" and "R11 (IGN8)"
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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)"
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Warning! The board can be damaged if you skip this step!
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External WBO vs more ignition channels:
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if you want to use an external WBO (AFR) sensor, then remove "R1 (IGN7)"
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Miata vehicle type:
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a) if you have a Miata 2002 (where we measure the battery voltage from 4T=alternator), then remove "R9 (2003)"
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b) or if you have a Miata 2003 (where we measure the battery voltage from 4S=ign.switch), then remove "R10 (2002)"
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## OEM harness add-ons
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The OEM ECU connector uses AMP Multilock .040 and .070 pins.
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| Board | stm32 pin | |
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|-----|---|---|
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| 4U | MAP| Manifold absolute pressure analog signal from [external sensor](GM-map-sensor) |
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| 4K | +5v | +5v feed for MAP sensor |
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| 3Z | GND | Sensor & USB ground |
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## Proto Area Pinout
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|Proto | stm32 pin |
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|-----|---|
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| EXT_SPI_SCK | |
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| UART_RX | PD6 |
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| UART_TX | PD5 |
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| EXT_IO1 | PB12 |
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| EXT_IO2 | PB13 |
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[rev C Reference image of jumpers set for external MAP sensor on 2003 miata](https://rusefi.com/forum/download/file.php?id=7570)
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See [Hellen-WBO](Hellen-WBO)
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