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BRAKE WARNING LAMP DOES NOT COME ON BRC-181 < SYMPTOM DIAGNOSIS > [VDC/TCS/ABS] C D E G H I J K L M A B BRC N O P BRAKE WARNING LAMP DOES NOT COME ON Description INFOID:0000000004212752 The brake ECU is connected to the combination meter with CAN communication via HV ECU. Diagnosis Procedure INFOID:0000000004212753 CAUTION: When replacing the brake ECU, perform initialization of linear solenoid valve and calibration. 1. CHECK CAN COMMUNICATION SYSTEM Check if the CAN communication system DTC is output. Result A >> GO TO 2. B >> Inspect CAN communication system. 2. INSPECT HV ECU Perform HV ECU self-diagnosis. YES >> Repair or replace malfunctioning components. NO >> GO TO 3. 3. CHECK BRAKE WARNING LAMP 1. Disconnect the brake ECU connector. 2. Turn the ignition switch ON. 3. Check that the brake warning lamp comes ON. NOTE: • The brake warning lamp comes ON. • If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step. Is the inspection result normal? YES >> Replace brake ECU. NO >> GO TO 4. 4. INSPECT COMBINATION METER ASSEMBLY 1. Turn the ignition switch OFF. 2. Reconnect the brake ECU connector. 3. Perform “BRAKE WARN LAMP” of the combination meter (meter CPU) using the “ACTIVE TEST”. NOTE: • The brake warning lamp turns ON or OFF in accordance with the CONSULT-III. • If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step. Is the inspection result normal? YES >> Replace brake ECU. NO >> Replace combination meter assembly. Condition Proceed to DTC is not output. A DTC is output. B |