DESCRIPTION The main body ECU (multiplex network body ECU) detects the condition of the rear door courtesy light switch assembly. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Before replacing the main body ECU (multiplex network body ECU), refer to Registration. Click here 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 / Data List. (e) Read the Data List according to the display on the Techstream. Body Electrical > Main Body > Data List
OK: Normal conditions listed above are displayed.
(a) Remove the rear door courtesy light switch assembly (for RH). Click here (b) Inspect the rear door courtesy light switch assembly (for RH). Click here
(a) Disconnect the 4A instrument panel junction block assembly connector. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Click here (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Remove the rear door courtesy light switch assembly (for LH). Click here (b) Inspect the rear door courtesy light switch assembly (for LH). Click here
(a) Disconnect the 4H instrument panel junction block assembly connector. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Click here (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Avalon Service & Repair Manual > Smart Key System(for Start Function, Gasoline Model): IG2 Signal Malfunction (B2788)
DESCRIPTION This DTC is stored when the steering lock ECU (steering lock actuator or upper bracket assembly) detects an IG2 power supply malfunction. HINT: The steering lock ECU (steering lock actuator or upper bracket assembly) is not connected to the CAN communication system. However, the steering ...