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 > Touch Select 2-4 And High-low System: Transfer Synchronization Actuator Circuit High (P17A7)
DESCRIPTION This DTC is detected when a short to B+ is detected in the solenoid coil drive circuit. DTC Code DTC Detection Condition Diagnosis Condition Malfunction Status Malfunction Time Other Trouble Area P17A7 Ignition switch ON (when not switching between 2WD and 4H) Short to B+ in the solenoid ...