4 wire oxygen sensor
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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.
4 wire oxygen sensor
What do I do with the extra wire on a 4 wire oxygen sensor? 2 go to the heater, one for the signal, do I just ground the extra wire? V3.0 MS with MS SnS. Thanks.
Re: 4 wire oxygen sensor
Yes. In my experience, the OEM Toyota harness has separate grounds for all sensors (O2, temps, MAP, etc). You may find it is already grounded via the exhaust manifold but I suggest a sepearte ground anyway to make sure you don't get flaky O2 signals.Dr.Hess wrote:What do I do with the extra wire on a 4 wire oxygen sensor? 2 go to the heater, one for the signal, do I just ground the extra wire? V3.0 MS with MS SnS. Thanks.
Regards, Richard
Successful MS Replacement for OEM Toyota ECU - all stock sensors and 2nd Ignition Input.