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C1A63 BRAKE POWER SUPPLY BACKUP UNIT BR-81 < DTC/CIRCUIT DIAGNOSIS > C D E G H I J K L M A B BR N O P C1A63 BRAKE POWER SUPPLY BACKUP UNIT DTC Logic INFOID:0000000010123010 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. Repeat step 1 two or more times. CAUTION: Be sure to wait for 5 seconds or more after turning the power switch OFF. 3. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector. 4. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for 3 minutes or more with all doors closed. CAUTION: Never operate the vehicle while waiting. 5. Turn the power switch ON without depressing the brake pedal. CAUTION: Never set the vehicle to READY. 6. Start CONSULT and erase self-diagnosis result of “BRAKE”. 7. Turn the power switch OFF to exit CONSULT, and disconnect CONSULT from data link connector. 8. Close all doors (including back door), check that the room lamp is OFF, get out of the vehicle, and wait for 3 minutes or more with all doors closed. CAUTION: Never operate the vehicle while waiting. 9. Turn the power switch ON without depressing the brake pedal. CAUTION: Never set the vehicle to READY. 10. Depress brake pedal by 100 mm (3.94 in) or more, and hold the position for 5 seconds or more. 11. Release brake pedal. 12. Start CONSULT and perform “BRAKE” self-diagnosis. YES >> Proceed to NO >> INSPECTION END DTC Display item Malfunction detection condition Possible causes C1A63 BACKUP POWER SUPPLY • A open is detected in the circuit between electrical- ly-driven intelligent brake unit and brake power • A short circuit is detected in the circuit between electrically-driven intelligent brake unit and brake • A short to power supply circuit is detected in the cir- cuit between electrically-driven intelligent brake • Harness or connector brake unit |