DESCRIPTION The skid control ECU (brake actuator assembly) sends a stop light operation request signal to the stop light relay (stop light switch assembly). If the skid control ECU (brake actuator assembly) detects a malfunction in the stop light relay circuit, the millimeter wave radar sensor assembly stores DTC C1A4B.
CAUTION / NOTICE / HINT NOTICE:
PROCEDURE
HINT: Pre-collision system DTC C1A4B may be stored due to a malfunction in the vehicle stability control system. Therefore, it is necessary to check for and troubleshoot vehicle stability control system DTCs first. (a) Check for DTCs. Click here
(a) Clear the DTCs. Click here (b) Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. (c) Check for DTCs. Click here
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Toyota Tundra Service Manual > Power Mirror Control System(w/ Memory): Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are ...