hello I have just a simple question does anyone know what "MTRTW" stands for? it is on a pinout diagram on a wire. is this the wire from the pcm to the temp gauge? ty

 

I have no idea. Having said that, check these links out that include references to the MTRTW jargon:

https://www.s2ki.com/forums/s2000-ra...ctions-400862/

https://www.insightcentral.net/threads/calling-on-all-electrical-experts.25998/

https://images.carid.com/aem/performance/pdf/30-6051-installation-instructions.pdf

[[
Here is an excerpt from
https://www.clubintegra.com/forum/th....17467/page-14

And this is what the doc states about ECT and VSS signals:

At ECU
Terminal: A1
Wire: YEL/GRN
Name: MTRTW
Desc: Sends ECT signal to ECT gauge
Signal: With ignition switch ON (II): duty controlled
]]

 

if a temp gauge is not working but when u put a ground to it the needle will jump to h if you ran a wire from the battery would that make it work? what am I missing if when I ground the wire the needle jumps to h?