Mitsubishi Outlander DCDC OBC

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The Mitsubishi Outlander PHEV (2012-2018 models) feature a compact CANBus controlled 3.7kw charger suitable for budget EV conversions. Units can be bought for under £200. Part numbers are: W005T70271 (pre 2018) [1], W005T70272 (post 2018) [2]

forum thread:

3d scan cad file:


* Length 370mm
* Width 270mm
* Height 150mm


Outlander internals bottom.jpg
Outlander internals top.jpg
Bottom Top

DC-DC Converter

The charger has an integrated DC-DC converter outputting a fixed 14.5V. The converter requires battery voltage between 200V and 400V on the DC bus.

*at about 397v the dcdc appears to stop operating via the enable lines. currently untested if it continues via can. [3]

To start the DC-DC converter, first to apply 12V to pin 7 and GND to pin 10. You also need to have its casing connected to common GND and 12V at the Pin 8 IGCT main power pin.

Then apply 12V ENABLE signal to pin 4 and you will see 14.5Vdc on the power line.

The DCDC is capable of at least 1800W of power.


Signal Connector


Pinout for the Signal Connector [1][2][3][4][5]
Pin on 13-pin Connector DCDC Side Pin Number Pin on Internal Connector DCDC Side Color Color from Schematic Name Function
1 6 Orange NC Not Connected
2 5 Blank NC Not Connected
3 4 Blue NC Not Connected
4 3 Grey Violet-Green DC SW Enable DC/DC Converter
5 2 Light Blue Pink-Green CHIN Serial Protocol to EV Remote WiFi Module
6 1 Black Black-Blue CAN H CAN High
7 13 Green Grey Sense Sense for DC/DC Converter (via shared 7.5A fuse)
8 12 Yellow Light Green IGCT Main +12V Power Supply (via shared 7.5A fuse)
9 11 White Blue CP Control Pilot from Charge Port
10 10 Black Black GND Ground
11 9 Blank NC Not Connected
12 8 Purple Brown-Red / Yellow-Black CHOT Serial Protocol to EV Remote WiFi Module
13 7 Red Red-Blue CAN L CAN Low

Note: Although the above pin numbers, for the 13 pin external connector, match the Mitsubishi wiring diagram the numbers marked on the connector are reversed for each row. Pin 1 is CAN H (Black), pin 6 is NC (orange), pin 7 is CAN L (red ) and pin 13 Sense ( green ).

External Connector

13 pin connector.png

The charger is controlled via a 13-pin connector mounted on a short tail into the case. Connectors seem to be widely available to mate with this. Search for "Sumitomo 6189-1092 13-WAY CONNECTOR KIT Inc Terminals & seals [13-AC001]".

Internal Connector

Empty Connector in Socket

In case the Charger doesn't come with the signal pigtail (which it usually does), the internal signal connector is from the Hirose GT8E series[6], specifically the Hirose GT8E-12DS-HU[7] with Hirose GT8E-2022SCF[8] pins.

The External to Internal wiring harness is as follows:

Internal Connector (Black) External Connector (Grey)
Outlander harness.jpg
Pin Wire Colour Pin Function (If Known)
1 grey 4 DC SW - Enable DC/DC Converter
Ext connector view 1.jpg
2 blue 3 NC
3 black 6 CAN H -CAN High
4 black 10 GND – Ground
Ext connector view 2.jpg
5 yellow 8 IGCT – Main +12V Power Supply (via shared 7.5A fuse)
6 green 7 Sense - Sense for DC/DC Converter (via shared 7.5A fuse)
7 light blue 5 CHIN - Serial Protocol to EV Remote WiFi Module
Int connector view 1.jpg
8 NC 11 NC
9 orange 1 NC
10 red 13 CAN L – CAN Low
Int connector view 2.jpg
11 purple 12 CHOT – Serial Protocol to EV Remote WiFi Module
12 white 9 CP – Control Pilot from Charge Port

AC Power Connector

Mitsubishi "MUC000691" cap

The AC power connector is Yazaki 7283-7350-30 / Toyota 90980-11413[9].

+12V DC Connector

The thread size of the +12V stud of the DC/DC converter is M8. The Mitsubishi part number for the correct cap is "MUC000691".

Charge Control

There is no voltage adjustment only current so your controller needs to monitor output voltage and step the charge current. Regardless of the set current the pilot signal will limit the charge current automatically. The pilot signal duty cycle is available on the can bus.

CANBus Messages

Outlander Charger DBC File

The CANBus interface operates at 500kbps/100ms.

Starting charging requires two messages:

0x285 alone will connect the EVSE but won't charge until you send 0x286. Byte 2 = 0xb6 pulls in the EVSE.

0x286 byte 2 sets the DC charge current, there is a voltage setting on byte 0 and 1. The charger reads this value only once. To update it, you have to first power cycle the 12V line "Pin 8 IGCT main power to charger". The requested current should be limited to 12A, going above this results in strange current delivery.

- Byte 0-1 = Voltage setpoint (Big Endian e.g. 0x0E 0x74 = 3700 = 370v)
- Byte 2 = Current in amps x 10

The charger also returns information over the CANbus:

0x377h 8bytes DC-DC converter status

- B0+B1 = 12V Battery voltage	(h04DC=12,45V -> 0,01V/bit)	
- B2+B3 = 12V Supply current	(H53=8,3A -> 0,1A/bit)	
- B4 = Temperature 1		(starts at -40degC, +1degC/bit)	
- B5 = Temperature 2		(starts at -40degC, +1degC/bit)	
- B6 = Temperature 3		(starts at -40degC, +1degC/bit)	
- B7 = Statusbyte 		(h20=standby, h21=error, h22=in operation)
-  - bit0(LSB) = Error
-  - bit1	= In Operation
-  - bit3      = 
-  - bit4      =
-  - bit5      = Ready
-  - bit6	= 		
-  - bit7(MSB) =


- B0 = Battery Voltage (as seen by the charger), needs to be scaled x 2, so can represent up to 255*2V; used to monitor battery during charge	
- B1 = Charger supply voltage, no scaling needed	
- B6 = Charger Supply Current x 10


- B0 = temp x 2?	
- B1 = temp x 2?	
- B3 = EVSE Control Duty Cycle (granny cable ~26 = 26%)


Parallel charger control:

One can use several chargers in parallel each on its own AC phase line.

Charger works good with simple 12V square PWM signal derived from DUE. So to control chargers in parallel i just need to send fake CP signal into DUE and sense the square weave to output two identical square weaves on other PWM pins. Chargers will respond to 0x286 request.

Charger voltage control:

Charger voltage control is dependent on reading its voltage reports on telegram 0x

First i request listening to CAN in main function. Of course variables need to be declared...

CAN_FRAME incoming;

if (Can0.available() > 0) {;
    if ( == 0x389) {
        voltage =[0];
        Ctemp =[4];      
    if ( == 0x377){
        aux1 =[0];
        aux2 =[1];  
        auxvoltage = ((aux1 * 256) + aux2); //recalculate two bit voltage value

I request charger command telegram function and within i condition for high voltage reduction and stop.

void sendCANframeA() { = 0x286; // Set our transmission address ID
	outframe.length = 8; // Data payload 8 bytes
	outframe.extended = 0; // Extended addresses - 0=11-bit 1=29bit
	outframe.rtr=1; //No request[0]=0x28;[1]=0x0F; // 0F3C=3900, 0DDE=3550, 0,1V/bit

	if(voltage < 193) { // if Charger senses less than 386V[2]=0x78; // 78=120 12A, 50=80 8A, 32=50 5A, 1E=30, 3A 14=20 2A at 0,1A/bit
	else if(voltage <= 194) { // if Charger senses less than or equal 388V[2]=0x1E;
	else {  //any other case[2]=0x00;
	}[3]=0x37; // why 37?[4]=0x00;[5]=0x00;[6]=0x0A;[7]=0x00;

	if(debug) {printFrame(&outframe,1); } //If the debug variable is set, show our transmitted frame

	if(myVars.CANport==0) Can0.sendFrame(outframe); //Mail it

	else Can1.sendFrame(outframe);

DCDC aux voltage control

I can also control 12V aux battery charging by reading DCDC report on 0x377. When aux voltage drops too much i can start DCDC or 3 minutes and 12V battery gets charged up.

if (auxvoltage < 1200) { // if aux voltage is low and DCDC is off
    auxState = true; // set the flag to true

    elapsedtime = millis();


Within this function then i compare status and count down 3min for the charge event

void DCDCauxcharge() {

    if ((auxState == true) && (digitalRead(Enable_pin) == LOW)) { // auxvoltage went below 12.2V
        digitalWrite(DCDC_active, HIGH);

        if (millis() - elapsedtime >= ontime) { // if aux voltage is low and for 5min
            digitalWrite(DCDC_active,LOW); // turn off DCDC_active relay

            elapsedtime = millis();
            auxState = false;
    else { // if auxvoltage is OK
        auxState = false; // turn off DCDC_active relay

Lots of other functions can be prepared on basis of CAN report reading. Those are some functions that are usefull.