DTN0024 - EVO X RS Plug-In M800 setup for factory centre diff controller

Document Number	DTN0024
Title	EVO X RS Plug-In M800 setup for factory centre diff controller
Approved By
Revision	Date	Prepared By	Change History
1.0	27/10/2009	DC/DR
1.1	04/04/2026	SD	Updated format

The M800 can be configured to transmit CAN messages to operate the factory centre diff controller and dash board.

Requirements: M800 EVOX Plug-In ECU running software version 3.51R or later.

CAN Setup
To transmit and receive all the CAN channels required by the car, setup the CAN parameters as follows –

In ECU manager on the Adjust menu, click General Setup > Communications > CAN Setup
 

CAN 3 Data	14
CAN 3 Address	776
CAN 4 Data	14
CAN 4 Address	528
CAN 5 Data	14
CAN 5 Address	1544
CAN 6 Data	5
CAN 6 Address	520

Auxiliary Output 8

Auxiliary output 8 must be set up to generate a channel that can be transmitted via CAN to request diff lock.

Auxiliary Output 8 | Aux Table = Diff lock request.
 

Function	3
Parameters
PWM/Switched	0
Output Mode	1
Polarity	0
Frequency	10
Minimum Duty Cycle	0
Maximum Duty Cycle	100
Hysteresis	0

Table: Diff control strategy

0% to approximately 20% has no effect on diff lock. From approximately 20% to 100% there is an effect on the amount of diff lock, but it is more dependent on other factors like wheel slip and diff mode that take priority. It can be used to preload the diff on turn into a corner and used on straight line acceleration where 100% will give approximately 20% actual diff lock.

Injector 6 Output

Injector output 6 must be set up to generate a channel that can be transmitted via CAN to control the speed of the thermatic fans.

Function	133
Parameters
Time Out	5
Frequency	100
Polarity	0
Output Mode	0
Minimum Duty Cycle	0
AC Minimum Duty Cycle	0

Table:

Engine Temp °C		0.0	80.0	80.1	90.0	90.1	135
ECU Temp °C	130	70	70	70	70	70	70
	95.1	70	70	70	70	70	70
	95.0	0	0	40	40	70	70
	-30	0	0	40	40	70	70

Low speed fan switches on with values above 1. High speed fan switches on at values above ~60. ECU temp is set as an axis of the table and is required to keep the ECU cool in the event of the ambient air temperature in the engine bay exceeding the ECU's rating.

Ignition output 6 and Digital input 4

Ignition output 6 and Digital input 4 must be set up to generate a channel that can be transmitted via CAN to control the Check Engine Light.

Ignition 6 Output – Driver Warning
Turns on the Check Engine Light on the dash board.

Function	108
Parameters
Hold Time	10
Include Diag Errors	0
Logic Polarity	0
Output Mode	0
Power Hold	0

Digital Input 4 – Monitor (Oil pressure warning alarm)

Function	29
Parameters
Polarity	0

Note: If polarity is wrong, oil pressure warning will show on the dash when the engine is started.

Wheel speed

The wheel speed sensors can be received directly from the car via CAN. The WSS (ABS) unit transmits wheel speed information that can be received by the M800 with the following input setup:

Input setup
Left Drive Speed (Wheel Speed RL) Source ECU2 3
Right Drive Speed (Wheel Speed RR) Source ECU2 2

Calibration for both wheel speeds: Custom, km/h, one decimal place

Input	-16384	-14784	-384	0
km/h	0.0	100.0	1000.0	1024.0