Introduction

It is not possible to program the ECU using the OBD2 diagnostic socket for the Mitsubishi ASX model fitted with AS+G (Auto Stop and Go). These are normally the 2012 onward models. ASX models without AS+G fitted can be programmed from the OBD2 socket without any issues.  Data logging and Read/Clear DTCs from the OBD2 is possible, it is only programming that is not possible on the AS+G model.  If you choose Enter Utility Mode on the AS+G model directly from the OBD2 connector, the ECU will go into programming mode but it will then not possible to program or restart the ECU from the OBD2 connector. This means that the vehicle cannot be started either.

Wiring Modification Overview

When programming the AS+G model we need to connect the EcuTek Vehicle Interface cable directly on to the CAN bus.  The CAN wires can be easily accessed in the side kick panel below the ETACS Fuse Board. This is Drivers side on Left Hand Drive (LHD) and passenger side on Right Hand Drive (RHD) models.  Once the wiring connections are made direct to the CAN bus, the ECU can be programmed or restarted as desired.  Data logging and Read/Clear DTC can be made from either the OBD2 socket or the temporary wiring connection onto the CAN bus.

Wiring Info

ASX

This image shows that we need to connect to pin 13 and pin 14 on the C-128 connector. The C-128 connector can be accessed in the side kick panel below the ETACS Fuse Board. This is Drivers side on Left Hand Drive (LHD) and passenger side on Right Hand Drive (RHD) models.

Pin 13 on the C-128 connector is CAN high. 

Pin 14 on the C-128 connector is CAN low.

Knowing what the pins on the EcuTek vehicle interface are we can determine what items connect where.

Mitsubishi Outlander 1.8 & 2.2 litre models

These models have different wiring to the ASX, so the CAN wires need to be connected directly to the ECU connector pins 108 and 109 on the B-10 connector.

To wire the Mitsubishi ECU on the bench you’ll need a 12V 5A power supply to provide power to the ECU. The only difference between this connector and the previous diagram is that you have to connect the ground wires to the EcuTek Interface Cable, and Pins 101, 103 and 104 to the 12V power supply. Power supplies lower than 5A may cause damage to the ECU or cause problems with programming.  

You'll need to connect to the ground on the EcuTek cable

Once this is completed you can use ProECU to detect the ECU as you would normally, this will circumvent the ETACS ECU completely.

Programming the ECU

Once the wiring connections are made direct to the CAN bus, the ECU can be programmed or restarted as desired.  Data logging and Read/Clear DTC can be made from either the OBD2 socket or the temporary wiring connection onto the CAN bus.