FPR function on from pin 4/22

[Gonzalo Bravo]

I am installing an 1UZ VVTi but have troubles with the fuel pump relay's control.

I like to use the FPR function, where the ECU grounds the Fuel pump relay by to start/cut the fuel pump. (I skip MREL function)

I wire the pin 4 in the 22 pins' connector to relay coil , but ECU is no grounding that pin. If I ground it, it starts.

Any idea guys?

 

[Gonzalo Bravo]

I am installing an 1UZ VVTi but have troubles with the fuel pump relay's control.

I like to use the FPR function, where the ECU grounds the Fuel pump relay by to start/cut the fuel pump. (I skip MREL function)

I wire the pin 4 in the 22 pins' connector to relay coil , but ECU is no grounding that pin. If I ground it, it starts.

Any idea guys?

Still does not ground the pump's relay. any idea why not?

Thanks in advance

 

[George_R]

you need fc pin if you don't need 2-speed control. fpr activates the relay for low speed.

 

[Gonzalo Bravo]

you need fc pin if you don't need 2-speed control. fpr activates the relay for low speed.

Thanks for reply.

That FC pin grounds the relay coil too or power it?

 

[George_R]

grounds it in any of the 2 conditions: STA pin has +12v, or crank angle sensor outputs pulses

 

[Gonzalo Bravo]

grounds it in any of the 2 conditions: STA pin has +12v, or crank angle sensor outputs pulses

And does it stops the fuel pump (relay´s coil actually) after some seconds when engine is not running and key in Start position ?

 

[Gonzalo Bravo]

And does it stops the fuel pump (relay´s coil actually) after some seconds when engine is not running and key in Start position ?

Adding to previous message.

Does this means the pump never starts before cranking? at "Start" for example?

 

[George_R]

that's exactly what it means
don't know about stopping the pump though