I have toyota corolla 2005 spec japan when i put my obd2 scanner its start blinking light and on phone its using connected and then its fail light off ! I have BlueDriver obd 2 scanner . I have check all fuse and its fine specially cig/ aux and obd fuse all are fine ! So what will be the problem
Maybe test your Corolla's data port for power and grounds.
Grab a multimeter and check pin 16 for battery voltage (12 volts+) and pins 4 and 5 for ground.
So switch the multimeter to 200K on the OHM scale.
Connect the black lead of the multimeter to a good ground and probe both Data Port pins 4 and 5 with the red lead..
You should be reading 0 on both pins
Now switch your multimeter to Volts DC and set it to the 20 volts scale.
Again, connect the black lead of the multimeter to a good ground and probe Data Port pin 16.
It should read battery voltage. Around 12 volts+
Now it should go without saying not to go poking around the other pins.
Just check these 3
