ECU HARNESS 6G72/6G74

Technical information, definitions, advice, and support for factory ECU remapping, aftermarket systems, and much more.
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Gus
New Member
Posts: 7
Joined: 25 Mar 2019, 13:22
State: Western Australia
Model: TH
Engine: 3.5-Litre 6G74 V6 24V SOHC
Transmission: 5 Speed Manual

ECU HARNESS 6G72/6G74

Post by Gus » 24 Apr 2019, 13:34

I have a Manual Magna SPEEDWAY CAR with a 6G72 & Tin Computer , I am Changing Motor to a 6G74.

Can I plug the Plastic 6G74 Computer into the 6G72 harness ,

Are the pinouts the same to make the Engine Run ????

Are their any settings in the 6G74 computer that need altering

WytWun
Valued Contributor
Posts: 536
Joined: 09 Apr 2011, 23:22
State: Australian Capital Territory
Model: Mitsubishi Magna TJ AWD
Engine: 3.5-Litre 6G74 V6 24V SOHC

Re: ECU HARNESS 6G72/6G74

Post by WytWun » 26 Apr 2019, 01:24

Gus wrote:
24 Apr 2019, 13:34
I have a Manual Magna SPEEDWAY CAR with a 6G72 & Tin Computer , I am Changing Motor to a 6G74.

Can I plug the Plastic 6G74 Computer into the 6G72 harness ,

Are the pinouts the same to make the Engine Run ????

Are their any settings in the 6G74 computer that need altering
As long as the harness connectors match the sockets on the ECU, the following are the only issues I'm aware of:

1) You will need to disable the immobiliser in the newer ECU.

2) If the harness is from an E/F series and the 6G74 ECU is from an H/J/L/W series, there will be no barometric pressure sensor in the MAF or the wiring in the harness to feed the sensor signal back to the ECU if you plug a later MAF in. In this situation a CEL will be raised for the missing sensor. If the ECU is from a J/L/W series the ECUFlash definitions support making changes to neutralise this CEL. Engine operation isn't affected either way.

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