KPERFORMANCE DIY r2 Motronic DIY Basis PCB User Manual
- June 15, 2024
- KPerformance
Table of Contents
- Introduction
- Included in Delivery
- Software
- USB Port
- Electrical connections
- Fuses
- Board Layout
- Pinouts
- Engine Speed Measurement
- Throttle Potentiometer
- Digital Inputs
- Spare CPU pins
- Analog Inputs
- Idle Speed Controller (Fidle)
- Ignition
- CAN Bus
- User Remarques and info
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
KPERFORMANCE DIY r2 Motronic DIY Basis PCB User Manual
Introduction
Congratulation for buying the Motronic board. The circuit is based on MegaSquirt 3 and pinout of the KdFi1.4 modules. Making the SM3 backwards compatible with the MS2 KdFi1.4 users and boards. It was refined and build 100% AEC-Q100 compliant. A KPerformance Wideband Lambda Controller is also part of the SM3 board. A Bosch LSU 4.9 sensor can be connected directly without a extra controller.
Included in Delivery
- SM3+ Module/KdFi and/or additional PCB
- USB plug*
- User manual
Software
Recommended tuning software TUNERSTUDIO and/or Megalogue viewer
USB Driver
The onboard FTDI chip simulates a serial RS232 connection:
TunerStudio – Communications – Settings: USB and Wireless (only in registered Version), Auto , 115200 Baud
USB Port
The Motronic DIY is smart, it will automatic revert to master USB connection as soon as the USB cable is plugged in! Without USB connection it will switch to Bluetooth(if installed).
The USB chip is downwards compatible, it can be used both with USB 3.0, 2.0 and 1. Each standard USB cable can be used as connection cable, but preferable with FERRIT core further avoiding ESD spikes.
Electrical connections
Like all other voltage supplied parts – must be preceded by a fuse in function of cable section.
Recommended cable types:
- Ignition: min 1.5 mm²
- Injection: min 1.5 mm²
- VR sensor: min 0.5 mm²
- Shielded Sensors: min 0.35 mm²
- Others: min 0.35 mm²
Fuses
Recommend using a 3A fuse for protecting the SM3. A automated 5A PTCC fuse is integrated on the board. It will reset itself after cooling down/solving issue or short circuit.
Board Layout
Pinouts
| KdFi Pin Label | In-/Output | Function |
|---|---|---|
| IGN1 | IGN output | Passive coil cylinder 1 |
| IGN2 | IGN output | Passive coil cylinder 2 |
| IGN3 | IGN output | Passive coil cylinder 3 |
| IGN4 | IGN output | Passive coil cylinder 4 |
| IGN5 | IGN output | Passive coil cylinder 5 |
| IGN6 | IGN output | Passive coil cylinder 6 |
| INJ1 | INJ output | Injection valve 1 |
| INJ2 | INJ output | Injection valve 2 |
| INJ3 | INJ output | Injection valve 3 |
| INJ4 | INJ output | Injection valve 4 |
| INJ5 | INJ output | Injection valve 5 |
| INJ6 | INJ output | Injection valve 6 |
| IGNA1 | IGN output | Active coil cylinder 1 |
| IGNB1 | IGN output | Active coil cylinder 2 |
| IGNC1 | IGN output | Active coil cylinder 3 |
| IGND1 | IGN output | Active coil cylinder 4 |
| IGNE1 | IGN output | Active coil cylinder 5 |
| IGNF1 | IGN output | Active coil cylinder 6 |
| 12v | Power input | Input Voltage 8-16V |
| GND | Power Input | Input Voltage GND |
| FP | Fuel Pump | Fuel Pump Relay |
| FDLC | FIdle Valve Output | Idle controller 3-pin-CLOSED |
| FDLO | FIdle Valve Output | Idle controller 3-pin-OPEN |
| RPM1 | Trigger input | Input speed Crankshaft |
| GND_RPM | GND VR input | Ground speed sensor |
| RPM2 | Trigger input | Input speed camshaft |
| IAC1 | General Output | General Output 1 max2A |
| IAC2 | General Output | General Output 2 max2A |
| AIR | Sensor input | Air temperature sensor |
| CLT | Sensor input | Coolant Temp sensor input |
| --- | --- | --- |
| TPS | Sensor input | Throttle Position Signal |
| OXY | Input | Lambda sensor signalbank 1 |
| OXY_2 | Input | Lambda sensor signalbank 2 |
| LSU BLACK | O2 Sensor input | Bosch LSU BLACK |
| LSU YELLOW | O2 Sensor input | Bosch LSU YELLOW |
| LSU RED | O2 Sensor input | Bosch LSU RED |
| LSU GREY | O2 Sensor Heating | Bosch LSU GREY |
| LSU WHITE | O2 Sensor Heating | Bosch LSU WHITE |
| LSU GREEN | O2 Sensor input | Bosch LSU GREEN |
| 5V | Sensor Supply | 5V Power Supply |
| TBL | Input | Table Switch |
Additional P1 connector pinout SM3 (see image pg7)
EGT+| K-Type Input| EGT sensor input+
AIN1/Flex| Analog Input| General analog input
AIN2/JS12| Analog Input| General analog input
PP1| Analog Input| General analog input
PT4| Spare CPU pin| !!!Direct CPU pin!!!
DIN1/NitroIN| DigitalInput| NitroIn input
AIN0/ExtMap| Analog Input| General analog input
DIN6/PT6/Datalog in| Digital Input| Digital logging start input
PT1| Spare CPU pin| !!!Direct CPU pin!!!
DIN4/Launch| Digital input| Digital launch input
GPO4/Boost| General Output| Programmable Output 1A
GPO2/Nitro2| General Output| Programmable Output 2A
GPO7/VVT| General Output| Programmable Output 2A
GPO5/Tacho| General Output| Programmable Output 2A
GPO8/Idle| General Output| Programmable Output 2A
GPO3/Nitro| General Output| Programmable Output 2A
PK7| Spare CPU pin| !!!Direct CPU pin!!!
AIN3/AD7| Analog Input| General analog input
PT3| Spare CPU pin| !!!Direct CPU pin!!!
Knock1| Knock Input| Knock Sensor Input1
---|---|---
Knock2| Knock Input| Knock Sensor Input2
PP0| Spare CPU pin| !!!Direct CPU pin!!!
PT5| Spare CPU pin| !!!Direct CPU pin!!!
EGT-| K-Type Input| EGT sensor input-
Engine Speed Measurement
- VR Sensor The measurement via VR sensor is the most widespread way in Europe for car engines. An AC voltage is induced in the coil of the VR sensor by a trigger wheel with 60-2 or 36-1 tooth. Connect VR-1N & VR-1P and/or VR-2N & VR-2P.
- HALL sensor may require a pull-up resistor of 1k to 10k ohm between signal-out and +5V. Leave VR-1N & VR-2N floating (do not connect)
Please use the DIP switches to activate HALL-sensor Pull-Up’s
Throttle Potentiometer
The throttle potentiometer is connected up by a 3-wire cable. +5V and GND are connected to the outer static pins of the potentiometer. The voltage relating to the throttle position is tapped via the sliding contact and connected to the input TPS (Throttle Position Sensor). The covered distance of the potentiometer may be longer than the rotation of the throttle axle. The corresponding calibration is done via “Tools” – “Calibrate TPS”
Digital Inputs
There are digital inputs that can be used for example as “Launch Control”. The corresponding function has to be defined in TunerStudio.
Spare CPU pins
BE very careful when using these !!Direct CPU Pins!! they have no
RC-filtering nor safety components. Incorrect usage can destroy
CPU inputs,
Preferable use GND activated inputs
Analog Inputs
There are analog inputs that can be used for example as
“Additional temp”. The corresponding function has to be defined in TunerStudio.
Idle Speed Controller (Fidle)
Supports both the 2-pin and the 3-pin idle speed valves.
Pin connections of the idle speed control:
2-pin: +12V & FDLO
3-pin: +12V & FDLO (open) & FDLC (closed)
The FDLO & FDLC are automatic inverted on the PCB, use Fidle control under TunerStudio,
Ignition
The Passive ignition coils can be activated by the integrated power drivers the PCB is equipped with 6 power drivers enabling sequential activation of passive ignition coils.
The active coils can also be activated, by using the active coil solder pads.
There are 6 injector outputs (INJ1-6) ; The injection valves are supplied with +12 V via the ignition switch and the ground wires of the injectors are activated via the SM3
Attention:
The setting whether the injection valves are of high or of low resistance has to be entered in Basic Settings” – “Injector Characteristics” strictly before the first test run because wrong settings can cause destruction of the injection valves or of the SM3a.
Starting values (no guarantee):
High impedance : PWM Current Limit (%): 100 PWM Time Threshold (ms): 25.5
Low impedance: PWM Current Limit (%): 30 PWM Time Threshold (ms): 1.5
Bluetooth or Wifi Connection
Optional bleutooth or wifi connection only in combination with Full SM3+ ECU
Onboard Wideband Lambda Controller
A Bosch LSU 4.9 sensor can be connected directly without the need to buy a further controller.
Starting of the controller is done by:
- activating DIP switch GP2-GND
- activating DIP switch OUTO2-OXY1
Calibration data TUNERSTUDIO custom linear wideband:
- 0V = Lambda 10.20 = AFR 22.35
- 5V = Lambda 0.650 = AFR 9.50
Onboard Knock
The knock IC uses a purpose designed knock sensing amplifier chip to filter knock signals.
Knock Wiring:
Knock Sensor1-> Knock1 ECU input and ECU ground
Knock Sensor2-> Knock2 ECU input and ECU ground
Onboard datalogging
The board is equipped with 1Gb of onboard SMD-sized memory.
Ready to be used under SD datalogging menu
Onboard RTC (real time clock)
The board is equipped with a very accurate RTC, giving the possibility to add ‘time stamps’ to the onboard data logging feature!
Making data logs easier to read, easier fault and/or tuning improvements.
CAN Bus
Like MegaSquirt the CAN Bus hardware is populated on the board, but has to be programmed accordingly by the user if desired. For further information on this item please read the respective Megasquirt /MSextra websites.
User Remarques and info
