Okay. Just slightly behind the Engine fuse box is a Diagnostic socket. Obviously for our inexpensive Mazda Dealer Mechanics to plug into and do some IT work looking for errors - be them mapping, fueling, ABS etc. Vigorous searching of the net produced a site retailing the leads required and software but at a price £700+

Wondered what exactly this socket could tell you? and if anyone has privately bought a lead and software from a different source----

i think it gives you different fault codes depending on what is wrong with the engine. this code then corrisponds to a specific fault/device and the software should tell you where the fault originated from and what it means.

i think thats how it works anyway, sum1 correct me if i am wrong.

It does that amongst other things, depending on the age/model of your car you can read live engine data from it, with the correct equipment. You can read fault codes with just an LED, resistor and a paper clip.

....'cept on MY car, for some reason!

[quote="Wai.Cheung"]....'cept on MY car, for some reason!








[/quote]

I'm sure you can buy a bottle of something to pour into your screen wash reservoir or something that will enable you to read DTC's Wai

[quote="stuartspel"]Okay. Just slightly behind the Engine fuse box is a Diagnostic socket. Obviously for our inexpensive Mazda Dealer Mechanics to plug into and do some IT work looking for errors - be them mapping, fueling, ABS etc. Vigorous searching of the net produced a site retailing the leads required and software but at a price £700+

Wondered what exactly this socket could tell you? and if anyone has privately bought a lead and software from a different source---- [/quote]
You can adjust your engine to run correctly by bridging the "grnd" and "ten" contact when the engine is hot! When these are bridged your engine will run lumpy...then adjust the idle screw till perfect idle and you mixture settings etc. will be correct. now remove the bridge and engine will run alot better. This should be done on every service without fail!!