location of speed sensor wire

[justhavnfun]

i need to tap into the speed sensor wire for a navigation install. any one have any ideas? thanks

[justhavnfun]

ok i found that there is a speed sensor wire to the radio. any one have a wiring diagram for the radio input of a mazdaspeed3 2007?

[Rotus8]

The Vehicle Speed sensor connects to the PCM on pins 2M and 2N, colored white/blue and brown respectively. This is assuming a manual transmission, you didn't say. I believe the speed information to the radio is over the CAN bus.

[Abaddon]

The Vehicle Speed sensor connects to the PCM on pins 2M and 2N, colored white/blue and brown respectively. This is assuming a manual transmission, you didn't say. I believe the speed information to the radio is over the CAN bus.

Oooooh... Look at Mr. Fancy Pants with his wiring diagram manual... lol :P

[Rotus8]

Oooooh... Look at Mr. Fancy Pants with his wiring diagram manual... lol :P
I see you being helpful.

[justhavnfun]

i removed the radio and didn't see any CAN bus cables. the input wire harness plug is the same as what mazda used in the BOSE miata's. i found a post that indicated pin " I " was the speed pulse wire. that would be the third post right of the main 12+ lead. i might drop by the dealer and see if they can confirm it before i tap it. oh by the way, ALL mazdaspeed3's are manual transmission. :)

[Rotus8]

i removed the radio and didn't see any CAN bus cables. the input wire harness plug is the same as what mazda used in the BOSE miata's. i found a post that indicated pin " I " was the speed pulse wire. that would be the third post right of the main 12+ lead. i might drop by the dealer and see if they can confirm it before i tap it. oh by the way, ALL mazdaspeed3's are manual transmission. :)
Thanks for clearing up which car you have - it would be easier if it was in your profile.

[justhavnfun]

Thanks for clearing up which car you have - it would be easier if it was in your profile.

you're welcome. if you read my secound post of this thread before anyone responded i stated what year and model car i had. :)

[justhavnfun]

The Vehicle Speed sensor connects to the PCM on pins 2M and 2N, colored white/blue and brown respectively. This is assuming a manual transmission, you didn't say. I believe the speed information to the radio is over the CAN bus.

where is the pcm located? any diagrams available for pin location? thanks

[Rotus8]

where is the pcm located? any diagrams available for pin location? thanks
PCM is attached to the side of the battery case. I am not sure about the pin locations, my book is at home. I'll look later if you still need it.

[Rotus8]

The attached file shows the connections to the ECU. Have fun!

[EXPORT "A"]

i need to tap into the speed sensor wire for a navigation install. any one have any ideas? thanks

Did you get the jvc deck kd-nx5000? I got the jvc deck and I've already gave up on finding the vss. I might just pick up the jvc pulse speed sensor but it's like alittle over 2 bills(hand)

[justhavnfun]

ROTUS8 thanks for the info on the pins and location. i'm confused though. the pin diagram states 2M is the 02 sensor and the 2N was the MAF sensor. am i reading this wrong? thanks

[justhavnfun]

Did you get the jvc deck kd-nx5000? I got the jvc deck and I've already gave up on finding the vss. I might just pick up the jvc pulse speed sensor but it's like alittle over 2 bills(hand)

no i am installing a gps that is located in my rear view mirror. a 4.5 inch LCD turns on and displays the gps map. also the side turn marker lights on the front fender have been replaced with marker/blind spot cameras and when i put my turn signal on, the LCD switches to that camera giving me full view of my blind spot. i like the system because it gives me compass/temp/ and navigation but when you look in the car, you can't tell the car has navi. portable navi units are the #1 item stolen from cars in 2006-7. also, the system has a back-up camera that displays the rear camera when put into reverse. the system is hard on the wallet! but its pretty cool though. i might have to go with the vss. we'll see. my avic pioneer ran fine without the speedpulse or the vss.

[Rotus8]

ROTUS8 thanks for the info on the pins and location. i'm confused though. the pin diagram states 2M is the 02 sensor and the 2N was the MAF sensor. am i reading this wrong? thanks
You just blew my mind!

The pins for the speed pickup I mentioned in the previous post are for the N/A ECU. I spent a long time studying the wiring diagrams for the speed ECU and PJB and there is no road speed pickup in the MS3 transmission! It is totally unclear how it knows your road speed; the only sensors for road speed I can find connects to the ABS so I guess the ABS computer detects the speed and broadcasts it on the CAN bus.

So, for your problem, you might tap into one of the ABS wheel sensors to get a road speed signal, but I don't recommend it. Tapping into anything dealing with the brakes is dangerous.

The factory NAV gets a speed signal from the instrument panel. With the factory NAV, there is a white wire going from pin 2O on the instrument cluster to the NAV DVD unit, but I think this wire is depopulated if you don't have the factory NAV. You might try to add a wire to the instrument connector to get the signal. That is the best advice I have. Good luck!

[justhavnfun]

thanks rotus8 i will be tearing out the dash cluster this weekend. that makes sense that the speed pulse wire (where ever the hell it comes from!) would find its way to the speedo.

[khaydin]

The factory NAV gets a speed signal from the instrument panel. With the factory NAV, there is a white wire going from pin 2O on the instrument cluster to the NAV DVD unit, but I think this wire is depopulated if you don't have the factory NAV. You might try to add a wire to the instrument connector to get the signal. That is the best advice I have. Good luck!

Rotus was right, it's in the instrument panel. I posted the location of the VSS a while ago. Here's a link to what I posted, there's a little picture there that shows the location and which pin to use.

http://www.mazdas247.com/forum/showpost.php?p=3319508&postcount=2

[justhavnfun]

Rotus was right, it's in the instrument panel. I posted the location of the VSS a while ago. Here's a link to what I posted, there's a little picture there that shows the location and which pin to use.

http://www.mazdas247.com/forum/showpost.php?p=3319508&postcount=2

WOW! this is very helpful. where did you get the install kit. i'm guessing i'm going to need to get one of those pins. thanks

[khaydin]

The image is big... if you're using IE7 it auto shrinks the image to fit the screen. Just click on the image once and it will make it actual size which is plenty readable.

[justhavnfun]

ok, i found the pin location but you never answered where to get the pin to insert in the plug. i went to radio shack and bought a serial port with pin blanks.(you have to buy the serial port to get the pin blanks) worked great! i suggest buying the tool to insert the pin. its only a couple of bucks but a bitch to install the pin wire without it. thanks ROTUS8 and KHAYDIN !

[cornflaykes]

Strip back the wire and put solder on it so it is stiff, then slide it in... I do this all the time when doing alarms and such.

[justhavnfun]

Strip back the wire and put solder on it so it is stiff, then slide it in... I do this all the time when doing alarms and such.

thanks for the tip! i put about 20lbs of pull on the wire and it wouldn't budge. hopefully it will be ok.

[mazdadude]

Strip back the wire and put solder on it so it is stiff, then slide it in... I do this all the time when doing alarms and such.

Man, that is a great tip when working with those tiny pins, why didn't I think of that???(huh)

When I did this to my Mazda5 to install the speed sensor wire pin for the Nav, the wire would bend before the pin was inserted completely, and was very frustrating.

Good Tip cornflaykes!

[que]

Now, I tried to connect a speed sensor wire for my turbo timer to this depopulated connector. I still was not able to pick up anything. What is the difference between signal used for audio navigation that seems to be working for people & a turbo timer signal?