How to hook up Dual O2 sensors?
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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.
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ka24deroadster
- MegaSquirt Newbie
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- Joined: Wed Jul 27, 2011 3:09 pm
How to hook up Dual O2 sensors?
How do you hook up 2 Oxygen senors? The manual states that the MSII can read 2 sensors but I can't find how to hook up the second one. I have dual exhaust on my truck and would prefer to know both side of my V8 are running right, instead of assuming because only one side is monitored.
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DonTZ125
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Re: How to hook up Dual O2 sensors?
From the MegaManual:
http://www.megamanual.com/ms2/configure.htmDual Wide Band: The dual lambda sensor feature has been in the MS-II code since V1.0. You connect the second sensor to the ADC6 input with appropriate circuitry and it adjusts the PW2 output independently of PW1. You connect the second sensor to the JS5 hole (on a V3 main board) - X7 on a V2.2 main board, duplicating the R10, R11, C10 circuit from the v3.0 PCB in the proto grid area. There is only one calibration because it is assumed you are going to use the same type of sensor on each side. If there is a small difference, you can compensate for it in the separate AFR target tables.
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ka24deroadster
- MegaSquirt Newbie
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Re: How to hook up Dual O2 sensors?
Looking at the Megasquirt-Inputs schematic at http://www.megamanual.com/ms2/ it shows the circuit connected to AD5-1. Is this where i connect the circuit to JS5? Where it shows 02, is this connected to any spare pin on the DB37 connector for the 02 sensor? What is the ADC6 reference?
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DonTZ125
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Re: How to hook up Dual O2 sensors?
AD5 is the standard O2 sensor ADC, with traces leading to the O2 filter circuit and then to the standard O2 input pin (pin 23 on the DB37).
JS5 is the pad for AD6, for the second O2 input. Duplicate the O2 filter circuit in the proto area; jumper the 'AD5-1' end to JS5, the other to one of the 'Spare' DB37 pins.
JS5 is the pad for AD6, for the second O2 input. Duplicate the O2 filter circuit in the proto area; jumper the 'AD5-1' end to JS5, the other to one of the 'Spare' DB37 pins.