DESCRIPTION When the pre-collision system is operating, the driving support ECU assembly sends brake control signals to the skid control ECU (brake booster with master cylinder assembly). If the driving support ECU assembly receives an electronically controlled brake system malfunction signal from the skid control ECU (brake booster with master cylinder assembly) via CAN communication, DTC C1A50 will be stored.
CAUTION / NOTICE / HINT NOTICE: The pre-collision system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting. Click here
PROCEDURE
HINT: If DTC C1A50 is output by the pre-collision 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): Driving Support ECU Communication Abnormal (C1A52)
DESCRIPTION The DTC C1A52 is stored when the ECM cannot recognize the driving support ECU assembly. DTC No. Detection Item DTC Detection Condition Trouble Area MIL C1A52 Driving Support ECU Communication Abnormal Approximately 17 seconds after the engine switch is turned on (IG), the ECM cannot reco ...
