Technical Need 5 volts Supply

[otaqi]

Hallo everyone i have problem with intake air temp sensor is not getting volts at all . i had change the ecu but still the same:bang: . i tried to make a wiring from ecu pins to the intake but nothing . i tried with multimeter check the pins into the ecu plugs is not getting any volts. i tied with another ecu the same thing. can anyone help with this to getting volts supply to the intke air temp sensor the car is 1.616v model

 

[aurick86]

Usually more that one sensors use the same 5v reference circuit.
The throttle, map, rpm.. etc they usually use the same 5v circuit.
Are they getting 5v?
Low power is not a sign of bad ground..but it might be that the ECU is not getting a good 12v feed.
Another possibility is that one of the sensors sharing the circuit might be shorted to ground.. so you would get low/no voltage on the 5v circuit.

You should also try to unplug sensors.. one at a time until you see a change in voltage ( this will show if you have a short to ground in a sensor).
Also the i had a friend with MAP errors ..it turned out to be that the wires were melted together and were touching ground.

Checkout ScannerDanner on Youtube for more info on 5v reference circuits and troubleshooting.

 

[otaqi]

hallo and thank you for replay .will i dont know if i have short ground . the sensor getting . ( map 4.7 volts - 5 volts signal - intake 0 volts - ground normal )
i dont know how can i find this shortcut . i have check the pins from the ecu to the intake is not having any volts between . the intake getting somtimes 0.23v not even one volt