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New here. My mrs has a 2009 Jimny, early this year it randomly cut out whilst leaving a round about. Shortly after I tried it out and it started and worked fine one day then the next it randomly lost power doing short trips. We took it to 2 garages who did the usual checks and found nothing. 1 garage had it running for 1 hour before it cut out and for 4 hours before cutting out. They suggested changing the crank shaft sensor. This didn’t change anything. When the engine cut out it was a total loss of power and the car wouldn’t connect to any diagnostic tool, and when it did it gave no faults. It would cut out at different times under different loads. When I drove it, it cut out leaving a roundabout again and there was a total loss of power, all dials and electrics went.
The garage suggested maybe an ECU fault and gave me the car back. Tried driving home an only made it 15 minutes before it cut out. It now hasn’t started since, tried a few different times and still won’t start. Decided to get a second hand ECU kit and so far I’ve swapped the ECU only and it didn’t start. I’m planning on replacing the ignition key, controller assy? and something else that came with the kit I bought.
Looking for any advice on this please. I’ve got basic experience and the garage said everything they checked was okay, although that was a few months ago now and it’s been sat on the drive since. Has anyone had intermittent power issues? Is it an ECU issue? I’ve found someone that can look at the ecu and look for issues but I can’t seem to kind any that work or have databases on a jimny ECU. I’m also now not sure the battery is sufficient. I was thinking of rechecking the starter and alternator but I have no experience in that, happy to learn, as the engine ticks over and sounds okay just no ignition but I need to double check.
Thanks for any advice. Hope I’m using this forum right.
Hi. ECU change will need the key to match it. If losing power, and dials going off etc, have you got a bad connection somewhere? Will take some chasing, but possibly a bad earth.
If there is a TOTAL loss of power, no lights, etc., that's your starting point, the electrical power from the battery, through the main fuse panel, ignition switch, etc.
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