DESCRIPTION The hybrid vehicle control ECU controls the back-up lights via the BKUP LP 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: Powertrain / Hybrid Control / Trouble Codes. (e) Check for DTCs. Powertrain > Hybrid Control > Trouble Codes
(a) Disconnect the 4D instrument panel junction block assembly connector. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Disconnect the 4F instrument panel junction block assembly connector. (b) Disconnect the A24 hybrid vehicle control ECU connector. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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(a) Connect the A24 hybrid vehicle control ECU connector. (b) Connect the 4D and 4F instrument panel junction block assembly connectors. (c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
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(a) 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 > Lighting System(for Hv Model With Cornering Light): Left Headlight ECU Variation Error (B2456)
DESCRIPTION This DTC is stored if the headlight ECU sub-assembly LH for another destination is installed. DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from B2456 Left Headlight ECU Variation Error The power switch is on (IG). Vehicle specification information received via C ...