Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Electronically Controlled Brake System(for Hv Model): Abnormal Leak in Accumulator (C1391). Malfunction in Front Speed Sensor RH Circuit (C1401,C1402). Malfunction in Rear Speed Sensor RH Circuit (C1403,C1404)
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 operat ...
