Just installed my scangauge 2 in my GX470 that I've had for 2 months. I added the Transmission Temp X-gauge (TFT) which was a process in of itself. It turns out Toyota was in process of changing protocols between ISO/KWPS and CANSF, so I have the ISO/ KWPS protocol. None of the 4 listed on the scangauge x-gauge list works for my GX, I would get a static reading of either 194 of 350, or no reading at all. It would start with either of those readings, and never moved, so I suspected it was an error. I spoke with their support and they provided one code that is apparently hit/miss with ISO/KWPS. I input this code (below) and it seems to work. It does seem now, though, that the temps are reading somewhat lower than I expected. I expected the trans temp to be closer to the operating coolant temp readings of around 180-184 degrees, but it's reading around 138-145.
I've searched a bit and am seeing posts about "where to be worried" about transmission temps which is 200+ etc...but I've only found one LC post referring to temps similar to what I'm seeing. I'm not sure if the temp is accurate or if it's another error in reading (note: this time I am at least seeing changes in the trans temp as I drive.)
So far I've only driven locally/ non-highway so maybe that's why it's not getting over 145. I just assumed it'd be in the 170+ range.
2003 GX 470, 118k miles, all stock for now.
Here's the code for the ISO/KWPS protocol:
Transmission Temperature (Degrees F)
TXD: 686AF101B4
RXF: 044105B40000
RXD: 2808
MTH: 00090005FFD8
NAM: TFT
I've searched a bit and am seeing posts about "where to be worried" about transmission temps which is 200+ etc...but I've only found one LC post referring to temps similar to what I'm seeing. I'm not sure if the temp is accurate or if it's another error in reading (note: this time I am at least seeing changes in the trans temp as I drive.)
So far I've only driven locally/ non-highway so maybe that's why it's not getting over 145. I just assumed it'd be in the 170+ range.
2003 GX 470, 118k miles, all stock for now.
Here's the code for the ISO/KWPS protocol:
Transmission Temperature (Degrees F)
TXD: 686AF101B4
RXF: 044105B40000
RXD: 2808
MTH: 00090005FFD8
NAM: TFT