DESCRIPTION When the mirror heater switch (rear window defogger switch) on the radio and display receiver assembly is pressed, the operation signal is sent to the air conditioning amplifier assembly via CAN communication. When the air conditioning amplifier assembly receives the signal, it turns on the DEF relay to operate the mirror heaters. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
PROCEDURE
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Air Conditioner / Active Test. (e) Perform the Active Test according to the display on the Techstream. Body Electrical > Air Conditioner > Active Test
(a) Check the window defogger system operation. Click here OK: The window defogger system operates normally.
(a) Remove the DEF relay from the No. 1 engine room relay block and No. 1 junction block assembly. (b) Disconnect the I12 outer rear view mirror assembly RH connector. (c) Disconnect the I28 outer rear view mirror assembly LH connector. (d) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Remove the DEF relay from the No. 1 engine room relay block and No. 1 junction block assembly. (b) Disconnect the I12 outer rear view mirror assembly RH connector. (c) Disconnect the I28 outer rear view mirror assembly LH connector. (d) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Remove the outer mirror RH. Click here (b) Inspect the outer mirror RH. Click here OK: Outer mirror RH is normal.
(a) Remove the DEF relay from the No. 1 engine room relay block and No. 1 junction block assembly. (b) Disconnect the I28 outer rear view mirror assembly LH connector. (c) Disconnect the I12 outer rear view mirror assembly RH connector. (d) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Remove the outer mirror LH. Click here (b) Inspect the outer mirror LH. Click here OK: Outer mirror LH is normal.
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Toyota Avalon Service & Repair Manual > Can Communication System(for Hv Model): Open in One Side of Bus 1 Branch Line
DESCRIPTION When the CAN bus main lines are normal (no open, short to ground, short to +B or short between lines) and there is an ECU or sensor on the "Communication Bus Check" screen that is indicated as not communicating or whose connection status on the "Communication Bus Check" screen changes in ...