New here. I have an 02 Mazda mpv. When I got it it had no fuel pump power or fire to the plugs. I installed a relay for the engine spot in the fuse box under the hood. That made pump work. I ohm out the crank sensor and it read like 280. So I changed it out with one that ohm out about 340. That gave me fire it cranked up with no problem. O/d light blinking so I checked the knock sensor. Had broke wire I fixed that. Everything was working like it supposed to no ces light or anything. I went back out to crank it now nothing. No fuel pump or fire and o/d light blinking again. I've googled and it keeps saying immobilzer but my key doesn't have a transponder in the key. When I called the dealer they confirmed that it was not supposed to have a transponder. SO IM LOST AT THE MOMENT. I'm thinking computer maybe?? Poss anti-theft seeing how it's no fuel or fire ... Thanks

 

Okay my problem was number 5 wire on my obd connectors wasn't getting a ground. It's considered a signal ground. I grounded it out using another wire that way I could still use my scanner. Had to replace a coil for a skip issue. Works great now. Hope this may help someone out there.