coug66

what do I need to check fuse resistor or relay?

I put a new pump and strainer becasue it wouldn't start. seems like no fuel. I turned ignition on and there is not 12 V to the pump plug. There is 4 volts which I think is the fuel level meter. I get a readout on the instrument panel showing fuel level.

So what do I need to check next to see if I need a fuse or relay or resistor?

thanks

Ian

rkw77080

Here's the troubleshooting procedure for the fuel pump...

Nad1370

Need to check FPMP relay, COPN relay and 7.5A IGN fuse.

coug66

I wanted to thank you both for the help. I don't know exactly what happened but I had issues with both FPMP and COPN getting power to activate the relays.

I checked the relays and they worked.

So I jumped both relays so they passed the power through to the fuel pump.

Then the pump buzzed and I was able to start the car. I then installed one relay and the car started, and then the other and it started. SO I buttoned everything up and everything works great.

Thank you for the manual and the clarification on relays and fuse to check. The car starts immediately and I am back on the road.

Nad1370

^^^
That's great to hear.
Electronics.
Baaahhh... Lol
I'd have new relays handy just in case it happens again.

coug66

Relay jumping, this is what got it to start.

Toots

Where is the FPMP relay? I found the COPN relay and it seems okay. Swaped horn relay with copn relay and new fuel pump didn't hum but when I bridged the COPN RELAY with a paper clip the fuel pump hummed when I turned on the ignition. Its a Lexsus is200 by the way.