Re:Re:2007 Odyssey No Comm - Fixed

Happy Thanksgiving! The other day I picked up my daughter from school, then two hours later went to get my son and got a cranking no start with immobilizer flashing using both sets of keys.

I had some time today check it at and found no communication with PCM and no 5v ref.

Checked power and grounds to PCM and all is good there unless I missed one, if anyone would like to check a diagram and confirm, feel free to let me know what you see!

I started disconnecting sensors and believe the only two I have left are the crank and FTP sensor since I can't get to them without a jack, which my friend is borrowing.

Thankfully we don't need to cars at the moment!





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What's the submodel? EX, LX, EX-L, Touring?

Asking because it matters for the wiring diagrams, and for ordering a replacement PCM if the time comes.

I'm pretty sure it an EX-L, but I do have to verify that with the vin or something.

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It didn't give me any options. 3.5L

One other thing I’d check is pins 6 and 14. For 60 ohms

Tutti57 wrote: I'm pretty sure it an EX-L, but I do have to verify that with the vin or something.

It didn't give me any options. 3.5L

It mostly comes down to the VCM system. The J35A6 doesn't have it, the J35A7 does. EX and LX got the A6, EX-L and Touring got the A7.

A7's came with an Engine Oil Pressure sensor, which is another potential 5V ref short. A6's did not.

There's two different part numbers for PCM's based on the engine. You CAN interchange them, they'll fit and run, but you'll get fault codes that never go away. Ask me how I know.

I found a few powers and grounds I missed before after spending more time in the manual and had no power on B2 but do at it's fuse feed. There is a wire to wire connector on the back bank valve cover that it runs through and I think I found the problem...Thanks again for helping/following along. I'll post back after I repair all of them. I can't tell if it's from the stupid angle it's stressed and bent at or rodent action.

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I know those rear bank junction connector well. NEVER seen any kind of stress or misrouting cause those wires to break.

I say you've got a rodent problem.

I repaired the wires today and all is good. Thanks for playing!