Second Sensor for Continuous Baro Correction
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Second Sensor for Continuous Baro Correction
Not uncommon for me to drive from sea level to 14,000 feet. I want to be set up for real time Baro correction. During my research, I believe this is what I need: MX4250AP sensor, Pin 1 to JS5, Pin 2 to ground (non-banded side of D1 which my configuration dosent use D1 so the hole is ready to use), Pin 3 to +5 location in proto area thru a 1K 1/2 watt resistor (I assume the +5 volts is from the layered PCB - two holes available, either one can be used). Setup is MT 255 under "Fuel Set Up", "General Settings", "Barometric Correction", Two Independent Sensors". No other settings needed. Diagnostics to check sensor operation is to change a gauge to "Barometer" in MT 255. If I missed anything please let me know -As alway, thanks in advance!
48 Chev Pick Up, 455 Olds Motor, MSII V3, MSD Ign, TunerStudio MS, Emb Code V2.920, LC1 WB, VR with 36-1 Wheel
Re: Second Sensor for Continuous Baro Correction
i think pin 1 goes through resistor, not pin 3.
don't forget to calibrate the table in flash according to specs of the sensor you install, although the one you listed may be in as default - but don't bet on it.
sheesh.... 'normal' to drive sealevel -> 14k feet? that is up there. you have link to pics of your truck? 48 = very cool.
don't forget to calibrate the table in flash according to specs of the sensor you install, although the one you listed may be in as default - but don't bet on it.
sheesh.... 'normal' to drive sealevel -> 14k feet? that is up there. you have link to pics of your truck? 48 = very cool.
__________________________
Sequencer (beta) accumulating miles on E12 M90 635csi
& Squirted Pontiac Bubbletop
Sequencer (beta) accumulating miles on E12 M90 635csi
& Squirted Pontiac Bubbletop
Re: Second Sensor for Continuous Baro Correction
Thanks, you were right, pin one thru resistor and pin 3 to 5 volts. I wired it up tonight and all i get is 260 kPa reading so sensors not working. It there 5 volts at 5 v location in proto area or do i need to pull in 5 volts?
48 Chev Pick Up, 455 Olds Motor, MSII V3, MSD Ign, TunerStudio MS, Emb Code V2.920, LC1 WB, VR with 36-1 Wheel
Re: Second Sensor for Continuous Baro Correction
Went back and rechecked wiring, not getting 5 v to sensor. problem was at ground on non banded side of D1. Moved ground to neg in proto area and works fine now. Does anyone see any problem with using neg in proto area?
48 Chev Pick Up, 455 Olds Motor, MSII V3, MSD Ign, TunerStudio MS, Emb Code V2.920, LC1 WB, VR with 36-1 Wheel
Re: Second Sensor for Continuous Baro Correction
hmm. you know what... if you look at schematic for 2.2 board, the non-banded end of D1 is a ground, but the schematic for 3.0 board is jump from tach select through optoin.
the instructions for adding a second baro is to ground at non-banded end of D1 which seems to be legacy from the 2.2 board. weird part is that when i built a 3.0 board, i was reading from same manual and i don't remember same hiccup. i must have grounded straight to the proto ground like you eventually did.
anyhow, i think the idea of grounding at non-banded side of D1 was to ground at same point as ground of first baro sensor which you could do at pin 2 of first baro sensor in either case, but the proto ground is fine too.
the instructions for adding a second baro is to ground at non-banded end of D1 which seems to be legacy from the 2.2 board. weird part is that when i built a 3.0 board, i was reading from same manual and i don't remember same hiccup. i must have grounded straight to the proto ground like you eventually did.
anyhow, i think the idea of grounding at non-banded side of D1 was to ground at same point as ground of first baro sensor which you could do at pin 2 of first baro sensor in either case, but the proto ground is fine too.
__________________________
Sequencer (beta) accumulating miles on E12 M90 635csi
& Squirted Pontiac Bubbletop
Sequencer (beta) accumulating miles on E12 M90 635csi
& Squirted Pontiac Bubbletop
Re: Second Sensor for Continuous Baro Correction
Thanks again, cant wait to do some final tuning!
48 Chev Pick Up, 455 Olds Motor, MSII V3, MSD Ign, TunerStudio MS, Emb Code V2.920, LC1 WB, VR with 36-1 Wheel