Print Page - Driving the water guage

Title: Driving the water guage
Post by: muffdan on December 17, 2009, 15:15

So does anyone know anything about how the water guage works? What does the ECU send it to make the needle go up and down?! I need to drive it myself so I have to figure out what it wants in terms of signal to work.

Title: Re: Driving the water guage
Post by: SteveJ on December 18, 2009, 19:10

There is no feed to the instrument module from the temperature sensor, so it must be being controlled over the CAN-bus

Title: Re: Driving the water guage
Post by: muffdan on December 18, 2009, 20:32

cheers Steve, do you know what CAN protocol the ECU uses? Basically is it standard or a Toyota proprietry version?

Title: Re: Driving the water guage
Post by: SteveJ on December 18, 2009, 21:14

Try this as a starting point - http://www.vassfamily.net/ToyotaPrius/CAN/cindex.html#OC.

It's for a Prius, but I suspect a lot of the data stuff is going to be relavent - I can't see Toyota re-inventing it all from the ground up for the '2

Title: Re: Driving the water guage
Post by: muffdan on December 18, 2009, 22:25

awesome, that's pretty much all the information I'm going to need. Brilliant, cheers Steve.

Title: Re: Driving the water guage
Post by: roger on December 19, 2009, 21:03

I never could understand why certain gauges and things disappeared into a box on the wiring diagram, I assume that's why.

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The Workshop => Audio / Security / Electrical => Topic started by: muffdan on December 17, 2009, 15:15