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 engine 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:
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(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 battery to terminal 4K-1. (c) Connect a negative (-) lead from the 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 > Airbag System(for Gasoline Model): Airbag ECU Malfunction1 (B1160-B1167)
DESCRIPTION The airbag ECU assembly consists of the acceleration sensor, safing sensor, drive circuit, diagnosis circuit, ignition control, etc. If the airbag ECU assembly receives signals from the acceleration sensor and pressure sensor, it determines whether the airbags and pretensioners should be ...