Caldina GTT no overdrive

[Jebus]

Hi, my 97 GTT just started playing up today, was driving to work all good and the O/D off light started blinking. I was in O/D at the time and it was driving fine. After turning the car off and driving it again it won't go into O/D. Just sits in 3rd. It still drives perfectly thorough the first 3 gears, after about 10 mins driving O/D starts blinking again.

I checked codes by bridging the diagnostics plug and got code 38 from the blinking O/D light. I cannot find what this relates to??

Any help is very appreciated, thanks!

[fivebob]

Looks like it might have overheated or you have a faulty temp sensor.

[Jebus]

Ahh beauty thanks fivebob

Shouldn't have overheated driving along the motorway? If I was to test the resistance across the sensor it should be between 79 and 156 if it's ok? Is the sensor easy enough to access?

[Jebus]

Just thinking, it must be faulty sensor, if I start the car from cold and drive it, it won't go into O/D for the whole drive, after 15 minutes the O/D light begins to flash (as per what you posted) . Logic says the trans won't be going into O/D as it thinks the trans oil isn't warm? (due to the faulty sensor having 0 resistance)

[fivebob]

[fivebob]

Just thinking, it must be faulty sensor, if I start the car from cold and drive it, it won't go into O/D for the whole drive, after 15 minutes the O/D light begins to flash (as per what you posted) . Logic says the trans won't be going into O/D as it thinks the trans oil isn't warm? (due to the faulty sensor having 0 resistance)

Faulty sensor would have to have high resistance, or be disconnected (infinite resistance) for that to occur. the after 15mins thing is only if the resistance stays above 156k-ohms for that long. Not sure if it wouldn't go into O/D for that reason though.

[Jebus]

Found this picture online and comparing it with your schematic, is it the black 2 pin sensor pointing right at the camera just below the Mount bracket? Thanks for your time

http://imagizer.imageshack.us/a/img132/9135/img3152pf.jpg

[fivebob]

Found this picture online and comparing it with your schematic, is it the black 2 pin sensor pointing right at the camera just below the Mount bracket? Thanks for your time

http://imagizer.imageshack.us/a/img132/9135/img3152pf.jpg

No, I think that's a speed sensor. What you are looking for according to the wiring diagram is an Orange(signal) and a Brown(earth) wire