INSPECTION PROCEDURE 1. INSPECT INNER REAR VIEW MIRROR ASSEMBLY (w/o Garage Door Opener System) (a) Inspect the operation of the electrochromic inner rear view mirror assembly. 
(1) Connect a positive (+) lead from the auxiliary battery to terminal 1 and a negative (-) lead to terminal 2. (2) Press the AUTO 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. (5) Measure the voltage according to the value(s) in the table below. Standard Voltage:
If the result is not as specified, replace the inner rear view mirror assembly. 2. INSPECT INNER REAR VIEW MIRROR ASSEMBLY (w/ Garage Door Opener System) (a) Inspect the operation of the electrochromic inner rear view mirror assembly. 
(1) Connect a positive (+) lead from the auxiliary battery to terminal 1 and a negative (-) lead to terminal 2. (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. (5) Measure the voltage according to the value(s) in the table below. Standard Voltage:
If the result is not as specified, replace the inner rear view mirror assembly. |
Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Headup Display System(for Gasoline Model): How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the headup display system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CUSTOMER PROBLEM ANALYSIS HINT: In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconce ...
