Wiring identification for Mazda 6 RX8 MAP sensor

[ajlelectronics]

I have this MAP sensor that I want to do some experiments with, but I am unable to find a wiring diagram that gives me colour codes. I know it will be -Ve, +Ve and signal, but the colours don't inspire me to guess! I have what looks like black/red, black/green and black/blue.

Anyone able to give me a clue please?

 

[The_Yellow_Ardvark]

If you know the car, you can google the wiring diagram and that will tell you.

 

[ajlelectronics]

That info is all I have.

 

[razordog]

That info is all I have.

Try www.alldata.com I have had a lot of success from this site there is no wiring data on autodata which I have, the Japanese do not like giving their secrets away, good luck.

 

[ajlelectronics]

I think black/blue is signal. Just the 5V polarity to decide now as the sensor is not grounded, but gets its -Ve from the ECU it seems, going by this diagram...
They call it an EGR boost sensor here though.

 

[ajlelectronics]

I have drawn a blank with this one. Wired up as per Mazda diagnostics and no output. So, I need another MAP sensor recommendation. Spec I need is around 1Bar range and most importantly, it must have a nipple to push a pipe of 4mm ID over. So an outboard mount rather than into the manifold direct. One or two mounting ears and with a plug and short length of loom. Information on the pinout is vital of course.

So far there are candidates in the Mondeo, Citroen Renault and Vauxhall vehicles. Mercedes A class is another. I could have a wander around a scrapyard locally with cutters in hand, Harry Buckland still allows it I think.

 

[Johnseat]

Merc sprinters and vito vans have the nipple boost sensor you require.
Old vans have a pipe to carry the boost pressure to the sensor, newer vans have the sensor mounted directly to the boost hose, both have the nipple.
Also you'll probably find on the sensor that pin 1 is positive and pin 3 is earth with pin 2 bring either a resistance or a percentage of the voltage down pin 1. Typically you'll find the sensor uses a 5v power source from the engine ECU.

 

[ajlelectronics]

Wonderful thanks! I have ordered the only one I can find with a plug and some loom attatched. I will have to go looking for the colour codes now for the wiring. Hopefully it will not be such a trial as the Mazda information to find.