The Top DSM Community on the Web

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. Log in to remove most ads.

Please Support RTM Racing
Please Support ExtremePSI

2G ECM/PCM wont communicate 2G bottom 1G top...help?

This site may earn a commission from merchant
affiliate links, including eBay, Amazon, and others.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

rangerguy

20+ Year Contributor
162
4
Dec 10, 2002
Newport, North_Carolina
So its a 98 GST - 2g bottom - 1g top

Hooked up both a high dollar and a low dollar scan tool to dlc connector. No dice, wont communicate.....idk if the fuel pump is turning on, but it doesn't have any spark for sure. Guy said he thought he heard the pump prime and we haven't heard it since...may have built up pressure already? Vehicle only has one ground for battery atm and all other connections are fine on positive cable to fuse box......so thoughts on the grounds not being enough have come up.

Looking for suggestions on things to check?

20 amp pcm fuse isn't blown..........all connections to pcm are snug..........FWIK its not uncommon for the pcms to blow capacitors...?

I know on some Hondas the dlc connector wont read if a power outlet fuse is blow....thoughts?

THANKS![DOUBLEPOST=1410869360][/DOUBLEPOST]Well I figured out some of the issue, the 1G cas harness that was supposed to be a plug and play set up was hacked into......the three wires which are supposed to go to the crank sensor harness were cut off the plug in connector and hacked into the harness and then the connector was connected to that end and plugged in......and pretty confident the ecm is crap. found a 97 gsx auto ecm for cheap with a guarantee.......I still don't have to switch ignition wires around - still obd2 - and this one came out of a running car......best of all now I have a pcm I can chip for dsmlink!

will update....still open to ideas!
 
Last edited:
Thank you luv2rallye! Will check into it.
 
Well.......it might help if I had the 20 A Fusible link installed in the underhood fuse box. To my credit though I got it with nothing installed and PO had painted over the fusebox cover.............happened to come across a thread with a pic of the fuse box top. Boom. Fixed.
 
Support Vendors who Support the DSM Community
Boosted Fabrication ECM Tuning ExtremePSI Fuel Injector Clinic Innovation Products Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications MyMitsubishiStore.com RixRacing RockAuto RTM Racing STM Tuned

Latest posts

Build Thread Updates

Vendor Updates

Latest Classifieds

Back
Top