mkowens2009

I have a 2001 Tacoma. It ran for about 10 miles and then just died. Would not automatically start back when tried. After an hour or so I tried to crank it and it started and ran for about 10 miles or 15 minutes and would just die. Now it will not start back at all. I have replaced the fuel pump, fuel filter, EFI relays, and Starter relay. I checked the electrical connections and the fuel pump is getting power but the relay is not sending power to the fuel pump. I believe this to be a COR (circuit opening relay), but not for certain. I have searched the fuse box located on the drivers side under the steering column and the passenger side behind the glove box area. Does anyone else know where this may be so I can check the connection with the COR? Or give some insight to what maybe causing this issue?

rworegon

Try behind the kick panel on the passenger side. If not there, try the driver side.

mkowens2009

both kick panels were checked and yet no relay be found! I am puzzled!!

RAD4Runner

Anyone Got Schematic?

How is power pump getting power if relay is not sending power to it?
Where is it getting its power? If it's getting power 12V on one side and still not working, did you check if it's getting ground on the other (-) terminal?

mkowens2009

I tested the fuel pump with hooking it straight to the battery terminals and it kicked on!

RAD4Runner

Got Schematic?

wyoming9

iTrader: (1)

It is up behind the instrument panel at least on the 2000 if you could not find it I would guess it is still there.

No clue about the best way to get at it.

I was curious about if the relay not working how it got system voltage.

Could have The Tesla wireless Power transmission option ??

I heard it was stolen sometime before they got distracted and sent to Oak Ridge No more fun working on cloaking devices

mkowens2009

No @RAD4runner!!

mkowens2009

No tesla power transmission option on the truck! I tested the file pump by hooking straight to the battery an it kicked on! The EFI Relays and connectors were tested with the ohm meter as well! So I was under the impression that the COR was bad!

mkowens2009

The EFI connections tested good on the ohm meter!

tantacoma

According to my '99 FSM, the COR is under the steering column (just a few inches from your left knee). You'll need to remove that lower panel (3 bolts and one screw, I think) to get to it.

mkowens2009

Anyone know how to properly test the ECM?

dntsdad

It attached to the bottom of the fuse panel under the left side of the dash if memory serves me. It'll,have the green/yellow wire going to it.

wyoming9

iTrader: (1)

Did you ever get this figured out??

mkowens2009

Problem still not corrected and the COR is no where to be found on the truck! No power coming back to the fuel pump plug! 12V hooked straight from battery to bypass the EFI Relay! Anyone else have by ideas?

wyoming9

iTrader: (1)

It needs to be there some place .

I hate to suggest this but a fused toggle switch off a ignition powered circuit with a pilot light .

To know it is powered on before cranking .

Till you can fix it correct.