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C1A90 CONTROL MODULE BR-281 < DTC/CIRCUIT DIAGNOSIS > C D E G H I J K L M A B BR N O P C1A90 CONTROL MODULE DTC Logic INFOID:0000000010123057 DTC DETECTION LOGIC DTC REPRODUCTION PROCEDURE 1. PRECONDITIONING If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn power switch OFF and wait at least 10 seconds before conducting the next test. >> GO TO 2. 2. CHECK DTC DETECTION With CONSULT 1. Turn the power switch OFF to ON without depressing the brake pedal. CAUTION: Never set the vehicle to READY. 2. Start CONSULT and perform “BRAKE” self-diagnosis. YES >> Proceed to . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000010123058 1. PERFORM SELF-DIAGNOSIS (1) With CONSULT 1. Turn the power switch OFF to ON without depressing the brake pedal. CAUTION: Never set the vehicle to READY. 2. Start CONSULT and perform “BRAKE” self-diagnosis. YES (“PAST”)>>GO TO 2. YES (“CRNT”)>>GO TO 6. NO >> INSPECTION END 2. INTERVIEW FROM THE CUSTOMER (1) Check to see if there is a removal history of 12V battery or 12V battery terminals. YES >> GO TO 3. NO >> GO TO 6. 3. INTERVIEW FROM THE CUSTOMER (2) Check to see if there is a lighting history of the brake system warning lamp (yellow). YES >> GO TO 6. NO >> GO TO 4. 4. INTERVIEW FROM THE CUSTOMER (3) Check to see if the customer has an experience of feeling unusual braking force (brake pedal operation). DTC Display item Malfunction detection condition Possible causes C1A90 POWER SUPPLY MODE Power supply to the electrically-driven intelligent • Harness or connector brake unit |