2007 sedan fuel pump not running and check engine light

[nitrus10032]

Thanks for the help!

It looks like the integration relay is working fine. The resistance across all sets of relay pins is ~330 ohms however. But apply the 9 volts to each closes them and gives me continuity between the pins.

The C/OPN tests don't look good though. There appears to be no continuity between 4B-9 (red wire) and 4E-5 (violet wire). When the engine is in the on position and I've connected one lead of the multimeter to 4A-8 and the other to my battery's negative terminal there is no voltage. So it appears the C/OPN relay is the problem.

Is that part replaceable or does the whole assembly have to be replaced? Do you have the relevant part numbers?

Again, thanks a ton for your help!

[CTScott]

Originally Posted by nitrus10032

Thanks for the help!

It looks like the integration relay is working fine. The resistance across all sets of relay pins is ~330 ohms however. But apply the 9 volts to each closes them and gives me continuity between the pins.

The C/OPN tests don't look good though. There appears to be no continuity between 4B-9 (red wire) and 4E-5 (violet wire). When the engine is in the on position and I've connected one lead of the multimeter to 4A-8 and the other to my battery's negative terminal there is no voltage. So it appears the C/OPN relay is the problem.

Is that part replaceable or does the whole assembly have to be replaced? Do you have the relevant part numbers?

Again, thanks a ton for your help!

That would be bad. If you have no continuity on the coil, then it should not start at all.

The C/OPN relay is not replaceable as it is seriously buried within the bowels of the body ECU assembly. There are quite a few part numbers for each year, based on number of doors, power locks or not, etc. If you want to PM me your VIN I can tell you which your car has, or you can stick a mirror up behind the body ECU to read the label on the back of it.

New ones are crazy expensive (~$700), but used ones can be purchased for under $100 from junk yards. I have one off a 2008 sedan that I picked up from a local junkyard for $75.