I have a 89' 2JZ running off of 1JZ electronics. Took it down to the drag strip, launched pretty hard, got some shaking and wheel hop from the rear end which shook the whole car pretty good, got up to about 5K in 1st gear and the car just died. Like all the electronics were still on but the SAFC neo turned off and I lost the check engine light meaning either the ecu fried or it lost power. I can give the neo 12V where it hooks to the main power wire for the ECU and it will turn on meaning the ecu ground is good (cause the neo shares that as well) but the ecu still wont give me a check engine light with the key on. Does the ECU control the main relay? I cant feel it clicking when my buddy turns the key on and off. Everything electronic in the car works perfect so my hypothesis of shaking a ground or power wire loose is out the window. Tried bypassing the main relay to no avail, all my wiring looks as good as the past 1500 miles when the car ran perfect. Checked all the fuses they all look good, went over all my wiring, all looks solid. Something so random like this has to be something simple but I just cant find it. Even opened up my ECU but it looks fine, ill try swapping it out with a known good one and see, its got to be a wire, a chassis relay, or the ecu.
The latest mystery problem, car is dead.
- Thread starter mk1spyder
- Start date
Yeh ECU has a wire labeled M-rel. they are usually gray in color. There should be igsw, m-rel, batt, +b/+b1 for powers. Make sure e2 sensor ground is cont to intake manifold.
Shouldn't be hard to track down.
Shouldn't be hard to track down.
I would use a volt meter or check light and see if the ECU has 12v power and 12v switched power. If those two are good i would check the ignition on wire and the check engine light wire.
The ecu grounds on the intake manifold look fine, and like I said before the safc turned on when I gave the black/red switched power wire 12v and it shares that ground so it has to be good. But obviously that switched 12v isnt getting power, though I dont even feel the main relay clicking, but if it is controlled by the ECU that would make sense.
I dont have power at any of the 12v sources, not at IGSW m-rel, batt, +b or +b1. What one thing could have gotten toast that controls all of those yet everything else in the car works fine.
Also I have 12v at the interior fuse box ECU-B, Engine, and ECU-IG. But no power at the IGN fuse on either side of the fuse. In the engine fusebox I dont have any power at the ECU fuse on either side. If I give it 12v the round relay that is right next to it and listed as main will click and the check engine light will come on. Then I can start the car but it will die and the safc neo says the TPS reading is 100% so im guessing its not getting voltage somewhere else when I jumper that.
Nope, found out it was my AM2 fusible link, weird, it looked fine through the clear plastic cover but I took it off and found that it had seperated down in the bottom of the fuse. But now my TPS is ready 100% all the time, wonder if I fried it?
mk1spyder said:
Figured out my zeitronix wideband controller is toast and it was feeding voltage into the TPS line and is also what caused the am2 fuse to go. Weird