DESCRIPTION The main body ECU (multiplex network body ECU) controls the operation of the TAIL relay. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
PROCEDURE
(a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Main Body / Active Test. (e) Perform the Active Test according to the display on the Techstream. Body Electrical > Main Body > Active Test
OK: Taillights illuminate.
(a) Disconnect the 4K instrument panel junction block assembly connector. (b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Click here (b) Connect a positive (+) lead from the auxiliary battery to terminal 4K-1. (c) Connect a negative (-) lead from the auxiliary battery to terminal MB-14 (TRLY). (d) Measure the voltage according to the value(s) in the table below. Standard Voltage:
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Smart Key System(for Start Function, Gasoline Model): Power Source Mode does not Change to ON (ACC)
DESCRIPTION If the engine switch is pressed with the electrical key transmitter sub-assembly in the cabin, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode. Related Data List and Active Test Items Problem Symptom Data List and Active Test Power sourc ...