The Top Mitsubishi Galant VR-4 Resource

Join the best E39A 1991-1992 Mitsubishi Galant VR-4 community and document your GVR4 journey.

  • Software Upgraded - Reset Your Password to Login
    In order to log in after the forum software change, you need to reset your password. If you don't have access to the email address you used to register your account, you won't be able to reset your password. In that case, follow the instructions here to regain access to the forum.

solenoid wiring issue


Well-known member
Dec 19, 2012
ronkonkoma, ny
Ok first the Facts:

GVR4 Pins
EGRS: Pin 53 Ground, Pin 102 Power (CA only?)
PCS: Pin 62 Ground, Pin 102 Power
BCS: Pin 105 Ground, Pin 102 Power
FPS: Pin 7 Ground, Pin 102 Power
o2 heater: MFI Relay pin 4 power, Pin 101 ground

My car (Wired like a 1993 model for some reason)
o2 heater: MFI Relay pin 4 power, Pin 105 ground

First of all if its not too much trouble can someone please look at a hard copy of the o2 sensor wire diagram. I only have the pdf version and it looks like it may have been edited.

Is there any reason I can't swap this back to ecu pin 101 so I can use pin 105 for a solenoid again?

Is there any reason to use power from MFI Relay pin 4 over ecu Pin 102?

I'd hate to find out the hard way an melt a perfectly good ecu.

Thank You
Support Vendors who Support the GVR-4 Community
Boosted Fabrication ECM Tuning ExtremePSI Fuel Injector Clinic Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications RixRacing RockAuto RTM Racing STM Tuned

Recent Forum Posts