INSPECTION PROCEDURE 1. INSPECT INNER REAR VIEW MIRROR ASSEMBLY (w/ EC Mirror) (a) Inspect the operation of the electrochromic inner rear view mirror assembly. 
(1) Connect a positive (+) lead from the battery to terminal 10(+B) and a negative (-) lead to terminal 3(E). (2) Press the EC switch. (3) Attach black colored tape to the forward sensor to prevent it from sensing. (4) Light up the mirror with an electric light, and check that the mirror surface changes from bright to dark. OK: Mirror surface changes from bright to dark. |
Toyota Tundra Service Manual > Intuitive Parking Assist System: Rear Clearance Sonar Sensor RH Circuit
DESCRIPTION The No. 2 ultrasonic sensor sends and receives ultrasonic waves. Based on the received wave, the sensor calculates the approximate distance value between the vehicle and the obstacle, and sends the distance value as a signal to the clearance warning ECU assembly. WIRING DIAGRAM PROCEDURE ...
