KPERFORMANCE DIY r2 Motronic DIY Basis PCB User Manual

: June 15, 2024
: KPerformance

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.