This one was a good one... or at least a little amusing... lack of pictures on this one it was cold and not fun being outside. 09 Honda Odyssey 3.5l comes in and doesn't start. Engine cranks over, nothing happens. Sounds like it has good (enough) compression. Checked for codes...
Nice... I think 32 is the most I've seen yet. And no engine codes...
Easiest thing to check first would be to remove the engine cover and backprobe one of the coils and check for power, ground and a trigger. It all checks out, so on to fuel. Pull the fuel pump fuse and put a loop in so I could look at fuel pump current. And... nothing. OK so it's a place to start.
On to the fuel pump relay. Pulled the relay (4 pin) and checked the terminals in the Multiplex Unit. All readings taken Key On Engine Off or Cranking.
- 12v KOEO/ground KOEC
9.7v? That's not right. Pin 4 would be the path to the fuel pump. So what's going on? Is this a short to power? Why would there be 9.7v on this wire with the relay pulled? Does the number of body codes have something to do with this? What are my next steps?