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Legnum Super VR-4 electrical issues


Galant VR-4 org Post #: 1247134 posted 09/05/19 06:51 PM     Remind Me!  Send Private Message   Edit Post      
I have a 97 Legnum Super VR-4 with some issues that I need some assistance with.

Issues started when a new head unit was installed and my auto oil temp (Defi) failed, but would work when the lights were on.
She also had a Billion VFC-MAX Water temp & fan controller.
While I was working out the issue with the Defi the Billion gauge spat out all of its magic smoke.
There is a Yellow wire on the Billion which is an Earth, not a 12v supply.

Now things went from bad to worse, extremely difficult to start 1st thing and the electric fans kick in on high instantly.
Once she has warmed up a little then things are fine (ish). Turbo timer doesn't work anymore either.

When it went on the scan tool, the coolant temp sender is showing up as -59C which to me means it's open circuit.

Help #1: Where on earth did Mitsubishi hide the ECU - I thought it was on the passenger side footwell (Mine is a RHD JDM version) but couldn't find it. I did search the forums.
I need to find Connector 4, pin 13.

Help #2: Where is the coolant sensor located? I did find this lonely sensor but cannot find a connector to go on it....

Help #3: I'll also need to know how the fans are wired up - am used to Sender -> ECU -> Fans.

Basically I just want to rip all the Billion wiring out and get the fans back to normal.

Finally, once the car has started, in 50 seconds the CEL and TCL idiot lights come up simultaneously.
Pulled the codes with a safety pin gave me :

I jumpered pins 1 and 4 and this is what I got:


12 FL wheel speed sensors (or a short break)

13 RR wheel speed sensors (or a short break)

21 FR wheel speed sensor system


12 Air Flow Sensor System

13 Inlet temperature Sensor System

21 Temperature Sensor System

They shaved the beards of our mothers with razors made of bronze,
They stole all our good LPs and ate all the potato scones.

It's nice to be important but it's more important to be nice.

Posts: 1 | From: Gladstone Park, VIC 3043 Austr... | Member Since: 09/05/19 | IP: ( | Report this post to a Moderator

iceman69510 Galant Moderator
Turn Right Racing

Galant VR-4 org Post #: 1247138 posted 09/06/19 11:18 AM     Remind Me!  Send Private Message   Edit Post   
Welllll, not the right VR4 to get expert help on the particulars here, but I think it is a good idea to remove the extra wiring first. You need to get yourself a wiring diagram for the car.

Last question- is the battery fully charged? Low voltage can make sensors do weird things.

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Posts: 10775 | From: Michigan | Member Since: 03/05/01 | IP: ( | Report this post to a Moderator

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