I have no connection on my OBDII port

[preatorian]

i have toyota corolla zze111 G6R 4zz engine.my problem is that i have no connection with OBDII port.i dont know the reason.
My ecu is bosch oem 89661-0w134
can someone help me if he has the wiring diagram for this ecu?
or some idea how to test the obdii pins?
thank you.

[preatorian]

any help?

[CelicaGuy13]

Check all your fuses. Make sure there is ground at pins 3 & 4 and 12 v at pin 16. Also with the car running, Use a DVOM to check for varying voltages at pin 8.

Here's a link for the pin out diagram

http://www.2carpros.com/forum/automo...d2_part1_1.jpg

[preatorian]

just today i check these 4 pins.all work correct but still no connection.
Any ideas?????
i still search for wiring diagram for this model.

[ilovecorollale]

Check for a blown fuse.

[preatorian]

all the fuses are look perfect but until now I have no solution in my problem.
something it must be on the wiring.
something else I have the trip computer only to check liters / kilometre and I have some other radio/cd device so the custom radio is disable. it can be the problem on this ?

[ilovecorollale]

Were you checking all the fuses under the dash or just in the engine bay?

[preatorian]

Originally Posted by ilovecorollale

Were you checking all the fuses under the dash or just in the engine bay?

both of them.all the fuses in my car works perfect.

[ilovecorollale]

Well i guess it leads to what you've done to your car wires.