code 36 help, maf burn off relay
01-03-2017, 02:26 PM
#1
Advanced
Thread Starter
code 36 help, maf burn off relay
OK, so heres where im at... im about to ask a tuner if i can just shut it off at the ECU, lol....
my car runs and drives fine... but i keep popping a stupid 36 code and hate looking at an SES light.
Ive replaced both relays, ive replaced my circular Maf with a new bosche one... that seems a diff style but is supposed to function properly for the car.
i have a full wiring schematic for the maf power and burnoff relays... i have used a power probe to change the signal wire coming from the ecu to ground , to simulate what the ecu would do.. when you do it , the burnoff wire on the Maf gets power .. so that verifies all wiring from there to the maf is correct..
Ive then ran the car, for about 10-15 mins.. with a volt meter on that same ecu signal wire, i shut the car off and that wire goes from powered to ground for about 1/8 of a second. so that verifies the wiring from the ecu to the relays is good.
i thought that signal is supposed to be longer.. but if its getting signal its getting signal..
anyone have any thougths? I really hate seeing an SES.
my car runs and drives fine... but i keep popping a stupid 36 code and hate looking at an SES light.
Ive replaced both relays, ive replaced my circular Maf with a new bosche one... that seems a diff style but is supposed to function properly for the car.
i have a full wiring schematic for the maf power and burnoff relays... i have used a power probe to change the signal wire coming from the ecu to ground , to simulate what the ecu would do.. when you do it , the burnoff wire on the Maf gets power .. so that verifies all wiring from there to the maf is correct..
Ive then ran the car, for about 10-15 mins.. with a volt meter on that same ecu signal wire, i shut the car off and that wire goes from powered to ground for about 1/8 of a second. so that verifies the wiring from the ecu to the relays is good.
i thought that signal is supposed to be longer.. but if its getting signal its getting signal..
anyone have any thougths? I really hate seeing an SES.
01-04-2017, 03:18 AM
#2
Race Director
OK, so heres where im at... im about to ask a tuner if i can just shut it off at the ECU, lol....
my car runs and drives fine... but i keep popping a stupid 36 code and hate looking at an SES light.
Ive replaced both relays, ive replaced my circular Maf with a new bosche one... that seems a diff style but is supposed to function properly for the car.
i have a full wiring schematic for the maf power and burnoff relays... i have used a power probe to change the signal wire coming from the ecu to ground , to simulate what the ecu would do.. when you do it , the burnoff wire on the Maf gets power .. so that verifies all wiring from there to the maf is correct..
Ive then ran the car, for about 10-15 mins.. with a volt meter on that same ecu signal wire, i shut the car off and that wire goes from powered to ground for about 1/8 of a second. so that verifies the wiring from the ecu to the relays is good.
i thought that signal is supposed to be longer.. but if its getting signal its getting signal..
anyone have any thougths? I really hate seeing an SES.
my car runs and drives fine... but i keep popping a stupid 36 code and hate looking at an SES light.
Ive replaced both relays, ive replaced my circular Maf with a new bosche one... that seems a diff style but is supposed to function properly for the car.
i have a full wiring schematic for the maf power and burnoff relays... i have used a power probe to change the signal wire coming from the ecu to ground , to simulate what the ecu would do.. when you do it , the burnoff wire on the Maf gets power .. so that verifies all wiring from there to the maf is correct..
Ive then ran the car, for about 10-15 mins.. with a volt meter on that same ecu signal wire, i shut the car off and that wire goes from powered to ground for about 1/8 of a second. so that verifies the wiring from the ecu to the relays is good.
i thought that signal is supposed to be longer.. but if its getting signal its getting signal..
anyone have any thougths? I really hate seeing an SES.
https://www.corvetteforum.com/forums...e-36-help.html
Post #52 has some interesting information with an oscilloscope trace that shows exactly how burnoff works.
Last edited by Cliff Harris; 01-04-2017 at 03:24 AM.
01-04-2017, 02:47 PM
#3
Pro
My 89 does the exact same thing and I have tried everything you have, new relays, MAF, checked wiring..
I just ordered a new ECU and will put my chip in it. I will let you know if it fixes it.
I am out of options and hate seeing the CEL.
I just ordered a new ECU and will put my chip in it. I will let you know if it fixes it.
I am out of options and hate seeing the CEL.
01-04-2017, 04:43 PM
#4
Advanced
Thread Starter
stockton: Just an FYI...im gonnna go through that thread one more time... but i contacted PCM of NC who did my tune... they said if i send my chip back in to them theyll reflash it deleting that function from my tune... not ideal... but eff it .if it keeps the stupid SES off for this horribly useless thing.. im gonna do it...
01-05-2017, 06:18 PM
#6
Advanced
Thread Starter
I dont really know, pcm of nc tuned my ecu with a daughter board, since they recenttly did my tune, they said send it back and theyll remove it no prob. Don't think you.can have your stock ecu cjanged to remove this, you'll prob need a chip or daughterboard... But I dont know for sure, I never tried to program one of these myself