DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) sends a stop light operation request signal to the stop light relay (stop light switch assembly). If the skid control ECU (brake booster with master cylinder assembly) detects a malfunction in the stop light relay (stop light switch assembly) circuit, the driving support ECU assembly stores DTC C1A4B.
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 C1A4B 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 > Automatic Transaxle System: Initialization
INITIALIZATION RESET TRANSAXLE COMPENSATION CODE NOTICE: If the following parts have been replaced, initialize the ECM, perform Reset Memory and Perform Road Test to Allow ECM to Learn. ECM (When transaxle compensation code cannot be transferred.) Transmission valve body assembly Solenoid (SL1) valv ...