DESCRIPTION This DTC is stored when a malfunction is detected in the electronically controlled brake system. Check the electronically controlled brake system when DTC P157800 is stored.
PROCEDURE
HINT: If DTC P157800 is output by the dynamic radar cruise control system, perform troubleshooting for the electronically controlled brake system. Click here
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Dynamic Radar Cruise Control System(for Gasoline Model): Brake Switch "A" Circuit Open (P057113)
DESCRIPTION When the brakes are applied by the dynamic radar cruise control system, the skid control ECU (brake actuator assembly) operates the stop light switch assembly (stop light control relay) to illuminate the stop lights. If the ECM receives a stop light control relay malfunction signal from ...
