Technical > Wiring & Sensors

Fuel pump channel not grounding.

(1/4) > >>

tom70:
I have problem with my corolla today, I won't bloody start.

So first thing check if the ECU is still alive, it is but the TPS is between 15% and 75% @ off/on throttle (maybe just out of calibration for long time)

Anyway, I hear no fuel pump running so I went on checking the fuel pump relay. Relay is fine (checked by grounding the switch) and fuel pump (checked) is in good health, relay to P259 channel 5 wire (continuety checked).

I have also checked the fuel pump channel on Megatune is the correct one, so it lead me to believe the vems is not grounding it.

Any ideas how to fix it?

tom70:
I have rewire the fuel pump relay channel to P259 channel 1, updated on the Megatune. Still no joy. ??? ???

rob@vems.co.uk:
First off theres something amiss if the TPS has gone out of calibration, unless the TPS is faulty.
Are you still getting a cranking RPM?
Try setting the P259 to channel i5, this will invert the channel so that its on when the car is not cranking.
What wires have you got free on following EC36 pins:

6, 7, 8, 9, 17, 18, 19, 20
or 33 to 35

tom70:
cheers for the reply Rob,

There is no cranking RPM, does register voltage drop during cranking.
Water and air temp at 24deg in a hot day?..mid day?

Tried invert to i5, pump is still not working when it's not cranking.

Wire free on EC36 are:  9 and 35

It was working (driven for 2miles) 10mins before I unplug and replug the vems into the car. I don't think I pulled any wire out since I pay extra caution by pulling the plug head only.

MWfire:
p259 is dead.
This happend when analog ground isn't connected to power ground.

Navigation

[0] Message Index

[#] Next page