GM FlexFuel sensor wiring requirements?

Pages: [1]

« previous next »

Author

Topic: GM FlexFuel sensor wiring requirements? (Read 7146 times)

elRey

Hero Member

Karma: +32/-1
Offline

Offline

Posts: 565

	GM FlexFuel sensor wiring requirements? « on: October 19, 2015, 09:02:10 PM »

Does anyone know if the ME7 hardware has what's needed to drive/read the GM ethonal sensor? Specificslly the pull-up. Not asking about code.

wiring: GM Part # 13352241
sensors:
GM Part # 13577394 - Long line version with mounting points.
GM Part # 13577379 - Short line version with mounting points.
GM Part # 13577429 - Basic sensor without mounting points.


« Last Edit: October 24, 2015, 05:10:27 AM by elRey »	Logged

elRey

Hero Member

Karma: +32/-1
Offline

Offline

Posts: 565

	Re: GM FlexFuel sensor wiring requirements? « Reply #1 on: October 22, 2015, 05:09:44 PM »

http://nefariousmotorsports.com/forum/index.php?topic=2955.msg28689#msg28689


	Logged

elRey

Hero Member

Karma: +32/-1
Offline

Offline

Posts: 565

	Re: GM FlexFuel sensor wiring requirements? « Reply #2 on: October 23, 2015, 12:49:03 PM »

Is there a simple way to do a resistance test between pin #61 or #20 and Huh

to see if there is a pull-up or pull-down resistor present?


	Logged

nyet

Administrator
Hero Member

Karma: +608/-168
Offline

Offline

Posts: 12271

	Re: GM FlexFuel sensor wiring requirements? « Reply #3 on: October 23, 2015, 07:58:03 PM »

Yes with ECU powered down, check resistance between VCC (+5 to ttl chips, not +12v) and pin and ground and pin.


	Logged

ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex

elRey

Hero Member

Karma: +32/-1
Offline

Offline

Posts: 565

	Re: GM FlexFuel sensor wiring requirements? « Reply #4 on: October 24, 2015, 05:12:26 AM »

If there is not a resistor, could we just add a resistor inline on the wiring harness between signal wire and power wire?

Also, where on the pcb is a good place to source vcc or sensor +5v if I add a resistor inside?

Thanks,
Rey


« Last Edit: October 24, 2015, 06:21:29 AM by elRey »	Logged

nyet

Administrator
Hero Member

Karma: +608/-168
Offline

Offline

Posts: 12271

	Re: GM FlexFuel sensor wiring requirements? « Reply #5 on: October 25, 2015, 01:37:48 AM »

Quote from: elRey on October 24, 2015, 05:12:26 AM

If there is not a resistor, could we just add a resistor inline on the wiring harness between signal wire and power wire?

yes but the closer to the input the better.

Quote

Also, where on the pcb is a good place to source vcc or sensor +5v if I add a resistor inside?

Find a datasheet for an IC nearby. For DIPs and PSOPs, usually one of the corners is vcc


	Logged

Pages: [1]

« previous next »

Jump to:

Navigation

Personal Tools

November 29, 2024, 10:19:08 AM

Welcome, Guest. Please login or register.
Did you miss your activation email?

Navigation

Personal Tools

Search