SYSTEM DIAGRAM 
 HEADLIGHT ASSEMBLY CIRCUIT  |
Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Electronically Controlled Brake System(for Hv Model): Malfunction in Motor (C1427)
DESCRIPTION When the power switch is on (READY), the stop light switch assembly off and the vehicle speed is 20 km/h (12 mph) or more, the skid control ECU (brake booster with master cylinder assembly) performs a self-diagnosis of the ABS motor relay circuit during the initial check of the actuator. ...
