MPG Calculator and Blank Buttons

[erkme73]

...the OBDII scanner port just on the underside of the dash beneath the steering wheel. I don't recall how long the cable for the tool is - probably something around 4 feet. One end has the OBDII port, the other is an RJ45. On the ScanGaugeII there are two RJ45 female ports. One on the back (the one I'm using) and one on the right side. You can use either depending on how/where you mount it.

[rivhern]

Originally Posted by klruff1

My 08 does not have the instantaneous and average mpg calculator on my dash display, it only gives outside temp. My co-worker does have this feature on his 07 Tundra. I was wondering if it is possible to add this feature to my 08? Buttons are there (blanks), just wondering if it is a big ordeal installing this feature, I gather there must be some sort of computer required to make these calculations, not sure if the truck is prewired for this or if this mod is possible outside of the factory.

We were also trying to figure out what all of the other blank buttons are for. On the console style, there are 2 blanks next to the Tow/Haul button, we are guessing one may be for foglights, not sure what the other is for, and the blanks surrounding the AUX hook up for the radio, we saw in the book the 2 outside buttons are for heated seats but couldn't figure out what the other was for. Any idea? Couldn't find anything in the owners manual.
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Keith in NJ
2008 Tundra Double Cab
Nautical Blue

The one button on the to the passengers side is for the Glass breakage sensor and one of the buttons down by your right knee is for the rear power window for the Crew Max. I can't think of what the other ones are for at the moment.

[Joe0757Pok]

the scangaugeII sounds friggin awesome. like someone else said a real eye opener. do any machanics on here know if tapping into the wires behind the obdII plug will affect anything? i just want to be able to hardwire the bitch and be done with it. and to still be able to leave the plug open for a programmer if anyone ever comes out with it. i do custom fabrication so once i install it. its installed

[erkme73]

I'm not an expert at this OBDII stuff, but I think it's a slave/host communication protocol, which means without some sort of a hub system, you'll likely only be able to connect one device at a time - regardless of how you make the electrical connection.

That being said, the ScanGaugeII cable is designed to pop off without harming the vehicle, gauge, or data stored. The 90° plug ensures that it's completely out of sight. When the mechanic wants to put his on, he'd simply remove the plug and put his own on.

BTW, the thing reads out the diagnostic trouble codes (DTC's) which you can research w/google, and clear to turn off the check engine light. Might just not need the mechanic.