Vr v6 ambient sensor wires connection and meaning

[pete30nz]

Hi team,

I know where the ambient temp sensor plug and 2 wire loom is.
One wire is light green with black trace. The other wire is brown with black trace.
Can you tell me what wire does what please.

I'm hooking up an after market sensor.

Cheers

Edited: Ambient temp

 

[pete30nz]

I just managed to find it in the Haynes manual.
Am I right? - sensor earth BR/B brown/ black.
Ambient (sensor) wire LG/B light green/ Black.

 

[grey_hawk]

Are you talking about the 'ambient air temp sensor'? (part of the electronic climate control)

In the Gregory's I have one side (which I'm thinking is an earth) a red wire that joins to N/B (brown/black) and the other side is shown as BY (black/yellow) which joins XB (light green/black) XB appears to be the signal wire for the 'Electronic climate control module' not sure if this helps...

 

[pete30nz]

Cheers for the reply, yes helpful info.

My cars ambient temp sensor 2 wire loom seems to be the colors in the photo attached. It did have a plug attached to the 2 wires..

My ambient sensor I purchased has a solid red wire, and a solid black wire.


Cheers

 

[pete30nz]

This morning on the way to work, the ambient sensor temp had a 13 degrees reading, and with in 10 minutes it was reading -13.

I'm unsure what could be wrong?

Cheers
Pete

 

[grey_hawk]

Is that the new sensor that's giving those readings?

Possibly a dry solder joint or a fault within the actual 'climate control module'.

Can you trace the harness back to where the wires change colours? they would have been soldered there which may be dry/damaged.
You could see what readings you get without the sensor in line,would give you an idea of a high or low resistance?

 

[pete30nz]

I will get around to striping back the insulation.
I can tell you with out the sensor plugged in, it was -30

 

[ephect]

You should be able to check the resistance of the sensor with a multimeter.

Measure at room temp, then you can use hot air to see the resistance change.

The sensor may not read as the bcm expects giving false readings

 

[pete30nz]

At the car at the moment. Will try and google how to check ambient sensor

 

[pete30nz]

6.10 on 20k ohms setting for the ambient sensor