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:
(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:
(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 > Electronically Controlled Brake System(for Hv Model): Abnormal Leak in Accumulator (C1391)
DESCRIPTION This DTC is stored if internal or external brake fluid leaks are detected due to improper sealing in the brake actuator (brake booster with master cylinder assembly) or brake booster pump assembly. Internal leaks are suspected if the pump motor operates frequently without braking. DTC No ...