Post by
Hijacker »
https://forums.nicoclub.com/hijacker-u9394.html
Tue May 27, 2008 9:36 am
We had a similar issue pop up recently with a CA swapped car. The problem turned out to be someone had accidentally plugged the ignitor and the dropping resistor pack backwards (the plugs were identical). This caused some backfeeding into the ignition relay that kept the relay active, but with only a 5v source doing so. You could tap on it and cause the relay to shut off, or you could put a test light the to circuit and the draw would cause the relay to shut off.
The wire that was specifically causing the backfeed was the red wire at the chassis/EFI plug beside the battery. We pulled just that wire out and the car quit staying on when we pulled the key out. The red was a constant wire (ECU backup power) that had managed to put its voltage into the circuit the black/red wire occupies. That wire circuit powers the ignition relay, so it's easy to see a low voltage source (especially if it was happening after a set of dropping resistors) was keeping the relay on. This won't be your cause since you don't have the same ignitor setup, nor a set of dropping resistors, but I put it up here just to give you an idea of what can cause this.
Also, looking at the power distribution diagram, I see the shift lock control unit is powered by the Black/Red circuit. Given that you just did a 5 speed swap to the car, I wonder if something with the shift lock unit is causing your problem (say you decided to cut/solder some wires to allow it to work and give you your key out instead of just leaving the unit plugged in).
Pull the fuse for the shift lock unit (the one on the bottom right of the in car fuse block) and see if your problem persists. If it does, you have your mysterious gremlin found. The fuse also supplies the ABS unit, ATCU (auto trans computer), inhibitor switch (auto trans thingy), back up lamp, and HICAS warning lamp.
There is a second, under the hood fuse, that supplies constant voltage to the shift lock unit. Since your problem occurs when the ignition switch is turned off, that could be a possibility.
Also, I'm wondering if it's just a bad shift lock unit since your symptoms seem to sound like only a small draw is keeping the relay on. If the shift lock unit or bad wiring were keeping a 12v signal going to the relay, there's nothing you could do to turn it off.
EDIT: I realized I got some lines on the power distro diagram mixed up and edited the post to fix that