fried MS chip.. launch control
#1
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,605
Total Cats: 16
fried MS chip.. launch control
i think i fried my MS1 chip....
I have MSnS_extra on a v3.0 board... knock control was hooked up and working and i went to hook up launch control... well it worked for a second...literaly... then it stopped showing up.... AND now megasquirt thinks the engine is knocking (even though ik its a false reading... my LED isnt goin off).... AND worst of all, it smells like burning plastic. I pulled out the megasquirt and saw burnt plastic around about pin 12 on the MS1 chip
I hooked up launch control by simply providing an active low directly to JS11.... after reviewing the manual again i see this...
I didnt build this circuit... is that what caused it to burn up? is my chip fried to the point of no return?
P.S.... to add to my stupidity/ bad luck while taking out the megasquirt i noticed a big buldge in my dryrotted front tire ...****
I have MSnS_extra on a v3.0 board... knock control was hooked up and working and i went to hook up launch control... well it worked for a second...literaly... then it stopped showing up.... AND now megasquirt thinks the engine is knocking (even though ik its a false reading... my LED isnt goin off).... AND worst of all, it smells like burning plastic. I pulled out the megasquirt and saw burnt plastic around about pin 12 on the MS1 chip
I hooked up launch control by simply providing an active low directly to JS11.... after reviewing the manual again i see this...
I didnt build this circuit... is that what caused it to burn up? is my chip fried to the point of no return?
P.S.... to add to my stupidity/ bad luck while taking out the megasquirt i noticed a big buldge in my dryrotted front tire ...****
#5
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,605
Total Cats: 16
i pulled out the continuity tester.... i have js11 (launch) jumped to SPR1 which should be pin3... no continuity
i have knock hooked up to SPR2 which is pin 4... worked fine as of yesterday... i have a datalog to prove it.
So... did i fry the board or something? why am i getting no continuity now?
i have knock hooked up to SPR2 which is pin 4... worked fine as of yesterday... i have a datalog to prove it.
So... did i fry the board or something? why am i getting no continuity now?
#7
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,605
Total Cats: 16
oh this day is never gunna end... jsut went to go put it back in the car to see if the chip is fried and i realized a solder point broke on the ignition mod... but it doesnt matter because the "knocked" icon was still highlited in megatune meaning my life blows and the chip is fried
Edit:
Ok i fixed the spark, the car started fine BUT it still shows up as knocking. id like to keep the knock retard feature...so i guess im gunna buy a new chip?
Edit:
Ok i fixed the spark, the car started fine BUT it still shows up as knocking. id like to keep the knock retard feature...so i guess im gunna buy a new chip?
Last edited by 240_to_miata; 01-09-2008 at 04:30 PM.
#8
Elite Member
iTrader: (11)
Join Date: Jun 2007
Location: Overland Park, Kansas
Posts: 5,360
Total Cats: 43
Tested it on stimulator by grounding that pin, the light comes on like its supposed to.
#9
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,605
Total Cats: 16
neutral safety switch is on the same circuit... try putting it in gear and see if that turns it off
i wanted a clutch switch starter bypass so what i did was jumped the connector under the dash, then connected that to 1 prong on the switch (because it is grounded) and MS to the other prong... this makes it so i dont have to have the car started and the switch is just for megasquirt
i wanted a clutch switch starter bypass so what i did was jumped the connector under the dash, then connected that to 1 prong on the switch (because it is grounded) and MS to the other prong... this makes it so i dont have to have the car started and the switch is just for megasquirt
#14
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,605
Total Cats: 16
man i hope my board isnt fucked and its just teh chip...
working on stim for wheel with the stim it still shows "knocked" although i see no voltage on the knock input pin... and even when put to ground the launch control will not activate :(
working on stim for wheel with the stim it still shows "knocked" although i see no voltage on the knock input pin... and even when put to ground the launch control will not activate :(
#15
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,605
Total Cats: 16
i fried my second chip today. I got it from DIY today and burned the firmware on the chip... tested it with the stim and it all looked good, no signs of an issue...
i plugged it into the car and got a knock signal from knocksenseMS and no wideband reading (they share the same power source)... so i disconnected the knocksense and got the wideband working. I even went as far as hooking back up launch control and testing it... all worked beutifully (with knocksense disconnected)...
then i shut my car off for a while, turned it back on and i had the same problems... both launch and knock were perminantly showing up on megatune.
The pins have continuity to the correct place BUT they are getting a low voltage reading which isnt normal... like .1v or so
Going on to investigate i found out that the power source to my wideband and knocksense was bad and the power was cutting in and out (bad butt connection).... could that be the cause of the problem?? i cant think of what else. everything is the same and the launch control switch is functioning fine
This is my second chip and i cant afford to keep replacing them..sorry for the long rant
i plugged it into the car and got a knock signal from knocksenseMS and no wideband reading (they share the same power source)... so i disconnected the knocksense and got the wideband working. I even went as far as hooking back up launch control and testing it... all worked beutifully (with knocksense disconnected)...
then i shut my car off for a while, turned it back on and i had the same problems... both launch and knock were perminantly showing up on megatune.
The pins have continuity to the correct place BUT they are getting a low voltage reading which isnt normal... like .1v or so
Going on to investigate i found out that the power source to my wideband and knocksense was bad and the power was cutting in and out (bad butt connection).... could that be the cause of the problem?? i cant think of what else. everything is the same and the launch control switch is functioning fine
This is my second chip and i cant afford to keep replacing them..sorry for the long rant
#18
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,605
Total Cats: 16
matt i have replied to the email you sent me...
But to keep every1 else updated...
The stim has R4 moddified to work with the miata mods... and i set megatune to "stim for wheel"
The board worked perfectly when i tested it on the stim directly after i downloaded the firmware, but after the chip fried in the car it shows errors even on the stim. Because the problem gets solved...atleast temperarily.. when i install a new chip i would think that the board is fine, but idk what im talking about.
But to keep every1 else updated...
The stim has R4 moddified to work with the miata mods... and i set megatune to "stim for wheel"
The board worked perfectly when i tested it on the stim directly after i downloaded the firmware, but after the chip fried in the car it shows errors even on the stim. Because the problem gets solved...atleast temperarily.. when i install a new chip i would think that the board is fine, but idk what im talking about.
#19
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,605
Total Cats: 16
i just installed the new chip and burned the firmware... everything seems to be working perfectly. launch and knock work when i ground them out. i have installed the active low input circuits on both of them now... wish me luck when i put it in the car
#20
Elite Member
Thread Starter
iTrader: (2)
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,605
Total Cats: 16
its fucked again... it worked fine most of the day... now the launch control pin has 1.4v on it normally (should be 5)... and launch control isnt activated even when its pulled to ground
WHAT THE ****
WHAT THE ****