Hello!
I recently purchased a 1995 Prado and it is in good condition overall, but there are some problems I am trying to sort out.
One worrying problem is that the "AT over temperature" light comes on intermittently in Drive and in while idling in Park.
Sometimes it stays on for long periods of time. I have driven the vehicle 10 miles since I bought it, and the AT over temp light was on the entire time.
I did not take it seriously because it came on as soon as the engine started. The check engine light sometimes comes on and then flickers back off.
The AT over temperature light does not come on at all in L or 2 gears.
Also, while in Drive, the over temperature light comes on solid red whenever I hit the brake pedal, and then sometimes goes out completely when I release the brake pedal.
Things I have already tried:
AT transmission fluid looks good to me.
While driving, the transmission functions flawlessly, did not notice any shifting issues
Tried scanning for errors using the diagnostics port. Bought an OBD1/OBD2 scanner with the correct adapter. The scanner could not communicate with the vehicle.
Used the paperclip method, shorting TE1 and E1 in the diagnostics port. When the key is in "Accessory" position, there is no check engine light coming on at all, so no codes to read.
With TE1 and E1 still shorted, I started the car, and the check engine light and the AT over temp light both flashed, but so far I can not match the flashes to any specific error code. There was no 4.5 second pause between groups of flashes. I have recorded the flashes for upload if anyone can help to decode them.
I also removed the glove compartment and disconnected the three main connectors on the ECU, sprayed them with CRC electronic cleaner, and reinstalled them, thinking maybe there was a bad connection. Pins appeared to be perfectly clean already, and there was no change in the error.
Has anyone had a similar issue? Do you have any suggestions for further troubleshooting? Should I just ignore it?
Thank you in advance!
-Chris
I recently purchased a 1995 Prado and it is in good condition overall, but there are some problems I am trying to sort out.
One worrying problem is that the "AT over temperature" light comes on intermittently in Drive and in while idling in Park.
Sometimes it stays on for long periods of time. I have driven the vehicle 10 miles since I bought it, and the AT over temp light was on the entire time.
I did not take it seriously because it came on as soon as the engine started. The check engine light sometimes comes on and then flickers back off.
The AT over temperature light does not come on at all in L or 2 gears.
Also, while in Drive, the over temperature light comes on solid red whenever I hit the brake pedal, and then sometimes goes out completely when I release the brake pedal.
Things I have already tried:
AT transmission fluid looks good to me.
While driving, the transmission functions flawlessly, did not notice any shifting issues
Tried scanning for errors using the diagnostics port. Bought an OBD1/OBD2 scanner with the correct adapter. The scanner could not communicate with the vehicle.
Used the paperclip method, shorting TE1 and E1 in the diagnostics port. When the key is in "Accessory" position, there is no check engine light coming on at all, so no codes to read.
With TE1 and E1 still shorted, I started the car, and the check engine light and the AT over temp light both flashed, but so far I can not match the flashes to any specific error code. There was no 4.5 second pause between groups of flashes. I have recorded the flashes for upload if anyone can help to decode them.
I also removed the glove compartment and disconnected the three main connectors on the ECU, sprayed them with CRC electronic cleaner, and reinstalled them, thinking maybe there was a bad connection. Pins appeared to be perfectly clean already, and there was no change in the error.
Has anyone had a similar issue? Do you have any suggestions for further troubleshooting? Should I just ignore it?
Thank you in advance!
-Chris
