Jimny not starting following body change

After some pointers here, my jimny (1999 g13bb) shell was really very poor, I wanted to put some sort of roll bar on her, then the opportunity to have a fully caged tray back chassis and solid body (2004 reg) came up, so I went for this, cost less than the metal to make a cage let alone the time to try and fix my shell which I think is too far gone anyway.

Idea being, transfer my axles, engine, suspension etc over, and for less work I have a caged truck with a solid body.

We've done most of the work but the engine won't start, turning over fine but no spark and it's flashing the engine management light pointing to a immobiliser fault.

Truck is currently using my engine, ecu, wiring loom, but the interior loom is from the later truck and the wiring looks a little different, the pickup ring looks different and the plug for the additional little immobiliser box thing is different on the new truck , I can plug my older little immobiliser box into the wiring, but the plug doesn't use all pins so can't be right.

Has anyone ever done this swap? Am I best trying to just get the immobiliser removed completely off my ecu, or swapping my interior loom/dash from my old truck into new? I'm assuming once my loom is over, all looms will be from old truck, as will ecu, engine etc, so should work.

I'm struggling to find much info really, as most who swap engines obviously keep the year/engine type similar to keep it easy and to avoid these issues!

If you have swapped the ecu. you will also need to swap the other associated electrics, as they are all coded together.
I don't think you can delete the immobiliser from the ecu?. I could well be wrong though.
Hopefully someone will pop up to confirm or tell me i'm typing rubbish shortly.

Yeah that's what we've done, we also brought over the ECU, immobiliser box thing, key with chip, but the wiring on the truck has a different plug for the immobiliser box thing and the pickup ring looks different so I don't think they will pickup and process the chip right

Pick up ring is coded to the ecu, so you will need the one from the car the ecu was taken from +keys +ignition switch and assciated wiring as it's all coded together. As far as i'm aware you cannot mix and match it. I could be wrong, And i'm sure someone will kick in and tell me if i am.
Or your other option is to buy an after market ecu and all those issues disappear.

Just swap the interior loom and dash/switches etc over so you end up with your old car complete, but the tinwork from the new one.

It will be quicker than trying to sort out a fix to the hybrid one.

Forgive me if I'm only now stating the obvious, but you have swapped the ignition barrel or the whole lock from the old one so that the key matches the ecu & immobiliser...

I sorted this by changing loom and coloum over on the weekend.

I changed over my steering coloum so it's all my original truck, so I can turn my original key in the barrel, which has the correct chip in it for the ecu and immo box, and all starts.

facade - I did have my original key in the pickup ring yeah, which I'd pulled away from the barrel to make sure it picked up my key not new key which was in the barrel being turned, but the pickup looked different and I couldn't swap over as the wiring was different on the loom. And the wiring for the immo box was different so I don't think it picked that up right either.

With the new loom in, entire coloum pick etc, it starts! Turns out it's a little more time consuming to put a loom in neatly than it is to pull out an old loom!

I'll pop some pics up on my progress thread once it's looking a little more together

Thanks for the help guys

Tom1357 wrote:
I'll pop some pics up on my progress thread once it's looking a little more together

Look forward to that. Well done with the switch over.