Motiv CAN patch is making my whole car erratic

tftimbn · 10-14-2022, 03:58 PM

I am setting up my Reflex+ on a 2018 M3, S55. All is working well, except when I upload the bin with the MHD patch applied, the car starts acting erratic. With ignition on, the fuel pump will go on and off. I get new error codes like ABS and airbag. When I start the car, the tach will jump from OFF to ~800rpm and bounce back and forth.

Tuner pro shows datalogging but MHD cannot read the ethanol CAN %. Just shows 0% but tuner pro shows 9%.

When I flash back to the stock s55 bin provided from motiv’s website, the car is back to normal.

I have MHD flashed with stage 0 and Motiv ECA set. Here is the output from MHD:

View post on imgur.com

Wanted_M · 10-15-2022, 04:55 PM

Make sure your Motiv connector wires are hooked up to the correct DME pins. Double check install. My best advice is, reach out to your tuner or installer.

tftimbn · 10-16-2022, 10:55 AM

Quote:

Originally Posted by Wanted_M

Make sure your Motiv connector wires are hooked up to the correct DME pins. Double check install. My best advice is, reach out to your tuner or installer.

I did the install. Wires appear to be okay, according to the wiring table motiv provides. Don’t have anyone tuning the car yet as I’m still getting things working.

I reached out to motiv but no answer yet, so trying to poke some brains in the community.

TopJimmy · 10-16-2022, 06:09 PM

PM coming

10-14-2022, 03:58 PM	#1
tftimbn New Member 13 Rep 28 Posts Drives: F80 M3 Join Date: Aug 2022 Location: NY iTrader: (0)	Motiv CAN patch is making my whole car erratic I am setting up my Reflex+ on a 2018 M3, S55. All is working well, except when I upload the bin with the MHD patch applied, the car starts acting erratic. With ignition on, the fuel pump will go on and off. I get new error codes like ABS and airbag. When I start the car, the tach will jump from OFF to ~800rpm and bounce back and forth. Tuner pro shows datalogging but MHD cannot read the ethanol CAN %. Just shows 0% but tuner pro shows 9%. When I flash back to the stock s55 bin provided from motiv’s website, the car is back to normal. I have MHD flashed with stage 0 and Motiv ECA set. Here is the output from MHD: View post on imgur.com
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10-15-2022, 04:55 PM	#2
Wanted_M Captain 773 Rep 957 Posts Drives: Frozen Blue M4CS Join Date: Jul 2009 Location: Norcal iTrader: (2)	Make sure your Motiv connector wires are hooked up to the correct DME pins. Double check install. My best advice is, reach out to your tuner or installer. __________________ M4CS Frozen Blue ARM DP's/Resonated Mid-pipe \| SPL links \| Hotchkis bars \| JRZ RS2/camber plates \| K&N \| Koyorad HX \| Powerflex purple \| Rouge \| Spiegler \| Speed Eng. snorkel \| Vargas CBC/hub \| Wagner IC \| xHP \| Xpel stealth ppf
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10-16-2022, 06:09 PM	#4
TopJimmy Major General 5524 Rep 5,198 Posts Drives: 2023 M3 Comp xDrive Join Date: Jul 2019 Location: Chester County, PA iTrader: (5)	PM coming __________________ '18 F80 Base 6MT \| '19 F82 Exec DCT \| '18 F82 Comp Exec DCT \| '23 G80cx
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