DIY Mazda2 DE factory cruise control retrofit

[Ahgalaga]

Can you re-load the factory defaults and clear the code?

Yes, when I reset to factory the code clears.

 

[switchport]

Not sure what you need to do exactly. My car was changing the line 25 as well, but I was able to get it when I changed them both simultaneously. I think I had to reset and try again around 5 times. Sadly I'm not an expert, I just got it working on my car.

 

[Ahgalaga]

Ok, thank for your help. I will do some more troubleshooting today.

 

[Ahgalaga]

What I've done so far:
-Swapped steering wheel and airbag
-Swapped clock spring (unnecessary)
-Checked wiring continuity from clock spring to the pcm connector
-Checked steering wheel cruise buttons with ohms meter
-Oscilloscope pcm test clutch and brake pedal
Everything has passed and functioning as it should. I still cannot get the cruise control to activate and when I change pcm line 7 and 25 I still get dtc code P0610.

Has anyone done this to a manual? Did these pcm values work for you? If anyone has a manual with factory cruise and can share their pcm data, that would be greatly appreciated.

 

[switchport]

What I've done so far:
-Swapped steering wheel and airbag
-Swapped clock spring (unnecessary)
-Checked wiring continuity from clock spring to the pcm connector
-Checked steering wheel cruise buttons with ohms meter
-Oscilloscope pcm test clutch and brake pedal
Everything has passed and functioning as it should. I still cannot get the cruise control to activate and when I change pcm line 7 and 25 I still get dtc code P0610.

Has anyone done this to a manual? Did these pcm values work for you? If anyone has a manual with factory cruise and can share their pcm data, that would be greatly appreciated.

My car is a north American 2012 sport with a manual transmission. I have to wonder if certain ECUs cannot accept the change? I do feel like mine kept changing line 25 until it just didn't once. I don't know honestly, I wish I was more help. That said I can give you the factory workshop manual if that helps. It's 121MB so I'm not allowed to just attach it to a post so here's a google drive link:

Mazda2 - Google Drive

drive.google.com

 

[Ahgalaga]

My car is a north American 2012 sport with a manual transmission. I have to wonder if certain ECUs cannot accept the change? I do feel like mine kept changing line 25 until it just didn't once. I don't know honestly, I wish I was more help. That said I can give you the factory workshop manual if that helps. It's 121MB so I'm not allowed to just attach it to a post so here's a google drive link:

Mazda2 - Google Drive

drive.google.com

Thanks for your help and files.

 

[Ahgalaga]

I GOT IT WORKING, I GOT CRUISE CONTROL!!!!

So after ALOT of digging and troubleshooting I finally figured it out. My issues was that the first 3 lines of the pcm values are all VIN related. My model is the base model Canadian version and cruise control was never offered on this particular trim level. So every time I would change line 7 and line 25 I would get the dtc P0610 because I was telling it that it had cruise control which contradicted the model code information. My original values for line 2 were 314B 5932 4334(1st picture), the "4B" signifies that it is a "K" trim code without cruise. All I had to do was change that to "4C" so my new line 2 read 314C 5932 4335((second picture)(the 4335 change was auto calculated by forscan checksum)). I had to change line 7 and 25 as previously mentioned and line 2 all at the same time and write all for it to work.

Hope this helps anyone else trying to do this upgrade.

 

[HAS]

Just wanted to spell out the coding part since it took me a whole day to understand and maybe others are as dumb as me. Here's the conversions and math:

If line 7 is F11E and you change to F320, you have to modify line 25 to offset that change.

So,

Convert your line 7 into decimal using this:

Hex to Decimal Converter

Hex to decimal number converter and how to convert.

www.rapidtables.com

Hex Decimal
F11E = 61726
F320 = 62240

Find the difference between the two decimal numbers:
62240 minus 61726 equals 514

Convert line 25 into decimal:
040D = 1037

Since line 7 was increased by 514, we need to subtract that:
1037 minus 514 equals 523

Now convert 523 into hexidecimal using this:

Decimal to Hex Converter

Decimal to hex number conversion calculator and how to convert.

www.rapidtables.com

523 is 020B in hexidecimal.

Entering 020B in line 25 is what I needed to get my setup to work, your car may be different as your line 25 may be different.

Thanks everyone for this forum and great instruction. i am able to activate my mazda 2 2008 , european model, japanese vin. remember ever car code might be different. pull the code calculate the value and use it. before make any chabge please save original value using for scan. you can find you tube video how to save default value . below there is a you tube link.


Here is my note for the code what i use in my mazda 2 2008. hope it will help some one.

FIRST PULL 2 VALUE FROM PCM LINE NO 7 AND LINE NUMBER 25 using for scan.

LINE 07 -> FFFF FF41 F11E (original value) -----> FFFF FF41 F320 (final value)

LINE 25 -> FFFF FFFF EDF6 (original value) -----> FFFF FFFF EBF4 (final value)

Hex to Decimal Converter

Hex to decimal number converter and how to convert.

www.rapidtables.com

HEXA TO DECIMAL
F11E - > 61726 (1111,0001,0001,1110-> in binary you dont need binary , i just keep it from my note.)
F320 - > 62240 (1111,0011,0010,0000 -> in binary you dont need binary , i just keep it from my note.)
DIFFERENCE is + 514

WE ADD 514 SO WE HAVE TO MINUS 514 FROM line 25

DECIMAL TO HEXA

Hex to Decimal Converter

Hex to decimal number converter and how to convert.

www.rapidtables.com

EDF6 - > 60918 so 60918-514 = 60404 which is EBF4 (1110110111110110 -> in binary you dont need binary , i just keep it from my note.)
EBF4 - > 60404 ( 1110101111110100 -> in binary you dont need binary , i just keep it from my note.)


NEW LINE 25 IS

FFFF FFFF EBF4



WE CAN USE HAXA CALCULATOR TO DO THE SAME CALCULATION

Hex Calculator

Hex calculator,bitwise calculator: add,sub,mult,div,xor,or,and,not,shift.

www.rapidtables.com

we can do in this way also , there is a you tube video. here is the link.

My value is F11E, 1E is checksum value. so we add 2 to F1 value to activate cruse control so we need to add 2 to checksum as well to balance the whole line.

F1+2 = F3 WE ADD 2 WITH F1 SO WE GET F3
1E+2 = 20
SO NEW VALUE F320

because we add 2 so we need to minus 2 from line 25. line 25 is the checksum for the whole table. using the calculator we get new value.
ED-2 =EB
F6-2 =F4
SO NEW VALUE EBF4


Have a great day every body, happy coding. chears.


F1= 11110001
F3= 11110011 change of binary 1 tell the computer that cruse control is activate. if you notice we add 10 (11110011-11110001=10). 10 in hexa decimal is 2. thats why we add 2 and later we minus 2.