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Home > CAPA Power Parts > Motec Engine Management Units > M4

Motec Engine Management Units

The M4 is our 4 cylinder/rotary Engine Management System (ECU) designed to provide you with the power and quality of our Pro series but at lower cost by letting you option in only the features you require. It is designed primarily for performance street cars & bikes but by choosing the optional features it is perfect for competition use, especially its sequential injection capability.

The M4 can control up to 12 cylinders and uses 3 dimensional mapping of engine speed against throttle or manifold pressure for improved accuracy. Ignition control gives you the ability to drive your ignition modules and set your spark timing to be at its absolute best at all points. Sequential injection lets you fire the injectors at the optimum time in the engine cycle and to adjust this for different engine RPM's. Advanced tuning gives many extra features including traction control, the ability to configure the ECU to your existing sensors, more load & speed sites and many other features. 512Kb of on board data logging is an option that lets you analyse the engine as it has been running. Configure the system to suit your needs and if you need more options later they can be enabled at that time. The M4 Clubman combines 3D mapping, sequential injection and ignition control into a package useful for the Club level enthusiast.

All M4 models have the accurate control necessary to meet legislated emissions requirements, including closed loop narrow band lambda control. The engine must, of course, be emissions capable.

The M4 can use nearly all original equipment and aftermarket ignition triggers, modules and coils, giving it unmatched flexibility. This avoids the cost and time needed to re-manufacture the distributor in order to trigger ECU's which are not as advanced as the MoTeC system. The M4 can be triggered by either a hall effect switch, a logic drive or a magnetic sensor, with various signal types and with intelligent signal filtering insuring proper signal to noise ratio at any crank speed. Electromagnetic interference can play havoc with electronic devices, and MoTeC take extensive preventive measures to reject low impedance conducted interference and to shield from radiated interference.

The heart of the M4 is a Motorola 32 bit microcontroller with a time co-processor, a choice which puts it at the leading edge of automotive control systems. Contained in a 132 pin surface mount package and consisting of over 420,000 transistors the M4 is built to internationally recognised quality control standards (ISO 9001). That the M4 reads its sensors 2400 times per second, and the entire control program is recalculated 200 times per second demonstrates its power. In personal computer terms the last PC to use a 16 bit processor was the '286' released in the early 1980's whereas 32 bit is still current technology. We were the first and to our knowledge the only people to have used this processor in this application.

MoTeC's unique software programmable switch mode drivers can trigger any injector with up to 70% less power usage than other products, drawing less power from the electrical system and generating less heat inside the ECU. Comprehensive diagnostics report on injector current usage and any wiring open/short circuit after each firing of the injector.

There is a comprehensive group of computer software tools available for the M4, including

Engine setup, tuning diagnostics and utilities.
Monitoring, data logging and analysis.
Utilities for loading new program code and enabling special features.

This software has been designed with the emphasis on useability, enabling you to quickly optimise the setup for your vehicle. Alternatively most of the basic tuning parameters can be accessed by the use of a hand held calibrator.

Other thoughtful M4 features include the use of programmable flash memory chip to store the control program. This means that there is no program chip or EPROM to change to upgrade the program. When a new program feature is offered you simply send the M4 the new code over the optional MoTeC connector cable and the latest features are available to you. Flash memory has also been included for the internal data logging, meaning that the recorded data will never be lost even if power to the ECU is removed. Flash storage also enables the M4 to retain information without needing internal batteries which have a finite service life.

*Engine Management Systems*	M4		M48
*Engine Management Systems*	Club	Pro	Club	Pro
Injection
Number and Type	4 Sequential or group		8 Sequential or group
User Programmable Current	0.5~12 Amp peak		0.5~6 Amp peak
User Definable Battery Compensation
Fuel Calibration
Accuracy	0.00001sec		0.00001sec
RPM & Load Sites are user programmable
Main Table (3D) - RPM sites x Load sites	40x21		40x21
Secondary Load Table
End of Injection Primary & Secondary - RPM sites	20		20
End of Injection Primary & Secondary (3D) - RPM sites x Load sites	20x6	20x6	20x6	20x6
Overall Trim
Individual Cylinder Trim
Individual Cylinder Tables (3D)		20x11
Secondary Injector Balance Table (3D) - RPM sites x Load sites	20x6		20x6
Adjustable MAP, Engine & Air Temperature Compensations
Auxiliary Compensations	2		2
Gear Compensation
Accel./Deccel. Clamp, Decay & Sensitivity
Cold Start (5 parameters)
Ignition Outputs
Number	4		2
One output may drive up to 8 coils using the MoTeC Ignition Expander
Ignition Interface allows connection to most OEM Ignition systems
Ignition Calibration
Accuracy	0.25 degree		0.25 degree
RPM & Load Sites are user programmable
Main Table (3D) - ROM sites x Load sites	40x21		40x21
Overall Trim - % or Degrees
Individual Cylinder Trim
Individual Cylinder Tables (3D)		20x11
Adjustable MAP, Engine & Air Temperature Compensations
Auxiliary Compensations	2	2	2	2
Gear Compensation
Accel. Adv. Clamp, Decay & Sensitivity
Dwell Time - RPM x Battery Voltage		20x11		20x11
Odd Fire engine capability
Rotary Ignition Split
Boost Control
Main Table - 20 RPM Sites
Table (3D) RPM v Throttle / Gear / MAP / Speed / Volt	20x11		20x11
Overall Trim
Engine & Air Temperature Compensation
Auxiliary Compensations	2	2	2	2
Trigger Sensors
Directly Compatible with most OEM trigger systems including: Hall, Magnetic and Optical types Multi-tooth (eg: Mazda and Toyota) 1 or 2 Missing Teeth (eg: Porsche) Many other special types including: Ford narrow tooth, Nissan optical, Harley Davidson

*Engine Management Systems*	M4		M48
*Engine Management Systems*	Club	Pro	Club	Pro
Sensor Inputs
Throttle Position, Manifold Pressure, Engine and Air Temperature
Auxiliary Sensor Inputs	2		2
Digital/Speed Inputs	2		2
Air Fuel Ratio Inputs
Narrow Band Air Fuel Ratio
Wideband Air Fuel Ratio Measurement	Opt.		Opt.
Number	1		1
Range - Lambda	0.75 to 1.20		0.75 to 1.20
Resolution - Lambda	0.01		0.01
Data Logging
Allows Logging of all ECU parameters	Opt.		Opt.
Memory Size	512KBytes		512KBytes
Logging Rate - Sets / second	1~20		1~20
Logging Time - 28 Par. + Diag. at 5/sec	38 minutes		38 minutes
Interpret Software -Graphical Analysis
Special Functions
Traction Control & Launch Control
Narrow Band Lambda Control
Wideband Lambda Control		Opt.		Opt.
Gear Change Ignition Cut
Over Run Boost Enhancement
Warning Alarms (Sensor HI/LO)
Gear Detection
Ground Speed Limiting
Dual RPM Limit
Nitrous Oxide Enrich / Retard
Air Conditioner Request
Over Run Fuel Cut
Standard Sensor Calibrations
Programmable Sensor Calibrations
RPM Limit, Hard or Soft cut, fuel and / or ignition
Outputs
Number of Auxiliary	4 (3 shared)		4 (1 shared)
Auxiliary Type - Switched / PWM	Any mix		2 / 2
Auxiliary Outputs can be used for: Turbo Wastegate Control Idle Speed Control Fuel Used Control Tacho Output Shift Light Driver Warning Alarm RPM / Load dependent device User definable Table (20x11) with selectable axis parameters Slip Warning Fuel Pump Relay Thermatic Fan Air Conditioner Fan and Clutch Intercooler Spray Bars Status Output
Alternate Injector Functions
Diagnostics
Injectors Open Circuit, Short Circuit, Peak Current not reached
Sensors Open & Short Circuit
Operating Errors: RPM Limit Exceeding, Injector overduty, Over Boost, Low Battery, REF Error etc.
Telementry Link
Allows real time monitoring & data acquisition via a telemetry Link	Opt.		Opt.

Notes
*	An M4 or M48 Clubman with Advanced Tuning Upgrade enabled has the same features as the M4 or M48 Pro
Opt.	Upgrade Option must be installed to enable this feature
PWM	Pulse Width Modulated Output. Can also be used as switched output.

M4 Clubman Specifications

Items marked with * are for the Advanced Tuning option only

General

Microprocessor 32 Bit 33 MHz with
Time CO Processor
Quality Standard ISO 9001
Manufacturing Standard IPC-S-815-A
Class 3 High Reliability
Warranty 1 year Parts & Labour
Burn In -50 to 70°C for 32 Hrs
ECU Control Software stored in updatable FLASH memory
High RFI Immunity
Low heat generation
Battery transient protection
Environmentally sealed electronics
Water proof connector with gold plated contacts
Case Size 120 x 100 x 36 mm (4.7 x 3.9 x 1.4 inches)
Weight 0.4 kg (14 oz)
Cylinders 1,2,3,4,6,8,12
Engines 2 stroke, 4 stroke, Rotary (1~4), Odd or Even fire
Maximum RPM >15,000 RPM

Fuel Calibration

Accuracy 0.00001 seconds
RPM sites are user programmable
Load sites are user programmable
Main Table (3D) 20 RPM sites x 11
Load sites (220 points)
Main Table (3D) 40 RPM sites x 21 *
Load sites (840 points)
End of Injection (3D) 20 RPM sites x 6 Load sites *
Overall Trim ±99 %
Individual Cylinder Trim ±99 % *
Individual Cylinder Tables (3D) 20 RPM sites x 11 Load sites *
Hi / Lo Injector Balance (3D) 20 RPM sites x 11 Load sites *
Hi / Lo End of Injection (3D) 20 RPM sites x 11 Load sites *
User adjustable Eng Temp, Air Temp & MAP compensations
Two Auxiliary compensations *
Injector Dead Time Compensation Accel Clamp, Decay & Sensitivity *
Deccel Clamp, Decay & Sensitivity Cold Start (5 parameters) *

Injection

4 group sequential
User programmable injector current 0.5~12 Amps peak
Battery Comp to suit any injector

Other Sensors

Throttle Pos, Manifold Pressure, Engine Temp & Air Temp
Narrow Band Oxygen
2 Auxiliary Sensor inputs *
2 Digital / Speed Inputs

Ignition Outputs

Up to 4 Ignition Outputs
Versatile Ignition Interface allows connection to most OEM ignition systems including:
- Nissan Multi Coil modules
- GM EST DFI systems
- FORD EDIS DFI systems
- Mazda Rotary DFI modules
- Many Others

Data Logging

Optional Logging memory allows logging of all ECU parameters
Memory Size 512 KByte
Logging Rate 1~20 sets / sec
Logging Time 10 minutes at 5 sets / sec (28 Parameters+Diags)
PC Software is available for analysis of the logged data

Boost Control Calibration

Main Table 20 RPM sites
Main Table (3D) 20 RPM sites x 10 Throttle sites or 10 Gear sites *
Overall Trim
Engine Temp & Air Temp comps
One Auxiliary compensation *

Trigger Sensors

Directly compatible with most OEM trigger systems including:
- HALL, Magnetic and Optical types
- Multi Tooth (eg Mazda and Toyota)
- 1 or 2 Missing Teeth (eg Porsche)
- Many other special types, eg. Ford Narrow Tooth, Nissan Optical, Harley Davidson

Ignition Calibration

Accuracy 0.25 degrees
RPM sites are user programmable
Load sites are user programmable
Main Table (3D) 20 RPM sites x 11 Load sites (220 points)
Main Table (3D) 40 RPM sites x 21 Load sites (840 points)
Overall Trim ±99 %
Individual Cylinder Trim ±99 % *
Individual Cylinder Tables (3D) 20 RPM sites x 11 Load sites *
Rotary Split 20 RPM x 11 Load
User adjustable Eng Temp, Air Temp & MAP compensations
Two Auxiliary compensations *
Dwell Time 20 RPM x11 Battery *
Odd fire engine capability Each Top Dead Centre angle may be specified Resolution 0.5 degree

Special Functions

Traction Control & Launch Control (2 wheel speed sensors) (or 4 sensors using the MoTeC TC Mux) *
Gear Change Ignition Cut Narrow Band Air Fuel Ratio Control *
Over Run Boost Enhancement *
Warning Alarms (Sensor HI / LO) *
Gear Detection *
Ground Speed Limiting *
Dual RPM Limit *
Nitrous Oxide Enrich / Retard *
Air Conditioner Request *
Over Run Fuel Cut
Sensor Calibration Tables RPM Limit Hard or Soft Cut Fuel and / or Ignition Cut

Diagnostics

Injectors Open Circuit, Short Circuit, Peak Current Not Reached
Sensors Open & Short circuit Operating Errors RPM Limit Exceeded, Injector Overduty, Over Boost, Low Battery, REF Error etc.

Operating Conditions

Internal Temp Range -10~85°C
Ambient Temp -10~70°C (Depending on load & ventilation)
Operating Voltage 6~22V DC
Operating Current 0.4 A max Reverse Battery External Fuse

Calibration

Personal Computer (see PC Requirements)

Telemetry Link

Optional Telemetry Link allows real time monitoring and data logging

Auxiliary Outputs

One Fuel Pump output, one Tacho output plus one general purpose output (see functions below)
Four general purpose outputs (3 shared with ignition outputs)
The general purpose outputs may be used for:
- Turbo Wastegate Control
- Idle Speed Control
- Fuel Used Pulse
- Tacho Output
- Shift Light (Gear Dependent)
- Driver Warning Alarm
- RPM / Load dependant device
- User Defined Table (20x11) with definable axis parameters *
- Slip Warning *
- Fuel Pump Relay
- Thermatic Fan
- Air Conditioner Fan or Clutch

M4 Pro Specifications