Air temperature sensor

[dark_knight]

@mork: not sure this will help much but here is a shot of my ATS - the wiring is green-black and brown-white. look at the plug in the pic to see which sides the wires go in relation to the plugs' orientation. does it make sense..? it not, i'll try get you another shot of the end of the connector. cheers mate..

 

[mork]

@mork: not sure this will help much but here is a shot of my ATS - the wiring is green-black and brown-white. look at the plug in the pic to see which sides the wires go in relation to the plugs' orientation. does it make sense..? it not, i'll try get you another shot of the end of the connector. cheers mate..

It looks like the brown/white is on the left and the green/black is on the right, as you look at the connector from the rear, where the wires protrude?

 

[dark_knight]

@mork: let me try explain it slightly differently; with the clip (that allows the plug to be removed from the sensor) on your left hand-side (viewing from the rear of the connector with the wires facing you), the top wire will be brown and the bottom one green. is this any easier to visualize..?
sorry, car's far off and this was the closest picture i had that i could show..

 

[mork]

The small rib that's on the grey part of the sensor in the manifold is on the top on my car, so the pins are left & right. Clearly the position of the sensor varies with tolerance and how tight it's screwed in.
I think the problem is not having the actual connector because of it being a non-Starlet harness. Texx states that it doesn't matter which way they go in, but then why bother colour-coding the wires?

 

[Texx]

Texx states that it doesn't matter which way they go in, but then why bother colour-coding the wires?

The sensor is a thermistor, it's resistance is relative to the temperature it's exposed to, as the temperature changes the electrical resistance of the sensor measured between it's wire terminals also changes.

The wire colours are there to distinguish between the wire that connects to the THA terminal of the ECU and the wire that connects to the sensor ground point E2 at the ECU. Whichever way you wire the sensor it'll provide the same resistance in the circuit, so it doesn't matter.

 

[weeJohn]

Texx is 100% right (as he usally is 100% of the time), dont matter what way its connected. This sensor connected wrong or not connected wont give you a high idle but, it would throw up the check engine light and a fault code. I dont know what the original engine set up was for the Sera, if it had an inlet mani similar looking to the 4EFTE one with the idle control valve at the drivers end of the inlet manifold, if so then the problem could be the TPS or the idle control valve stuck open. If it didnt have the idle control valve at the end then the idle control was built into the throttle body of the Sera then some wiring changes will be needed.

If you had a pic of the original Sera engine fitted it would be a great help here.

 

[dark_knight]

well, i concur too on the connector being able to go anyway around, but if you are like me, i at times like to go by the book, esp when doing electrical/electronics - it makes troubleshooting later a tad easier..

 

[weeJohn]

well, i concur too on the connector being able to go anyway around, but if you are like me, i at times like to go by the book, esp when doing electrical/electronics - it makes troubleshooting later a tad easier..

I just a resistance in the sensor, so the book wont denote what way to connect it as it doesnt matter.

 

[dark_knight]

@weeJohn: alright.. truce..