|
|
C1256 BRC-105 < COMPONENT DIAGNOSIS > [VDC/TCS/ABS] C D E G H I J K L M A B BRC N O P C1256 Description INFOID:0000000004212683 The accumulator pressure snesor is built into the actuator and detects the accumulator pressure. The brake ECU turns on the brake warning lamp and sounds the brake warning buzzer if it senses a decrease in the accumulator pressure. DTC Logic INFOID:0000000004212684 Diagnosis Procedure INFOID:0000000004212685 CAUTION: When replacing the brake ECU or brake actuator assembly, perform initialization of linear solenoid valve and calibration. NOTE: When C1241, C1252 or C1253 is output together with C1256, inspect and repair the trouble areas indicated by C1241, C1252 or C1253 first. 1. BRAKE PROBLEM CHECK Ask the customer if frequent braking is performed when the brake control warning lamp comes on. NOTE: This DTC is output even if the accumulator pressure drops only temporarily due to frequent braking. A >> GO TO 2. B >> INSPECTION END 2. READ VALUE OF CONSULT-III (ACCUMULATOR PRESSURE SENSOR) 1. Connect the CONSULT-III. 2. Turn the ignition switch ON. DTC INF code Display item DTC detection condition Trouble area C1256 141 ACC PRESSURE LOW When either of the following is detected: Braking operation is input when accumu- 2. Accumulator pressure is less than 14.62 • Accumulator pressure bly (Accumulator pres- • Brake actuator assem- bly (Pump motor) 143 When any of the following is detected: Any of the wheel cylinder pressure sen- 2. Accumulator pressure changes little 3. Accumulator pressure is less than 14.62 Condition Proceed to Frequent braking is performed. A Frequent braking is not performed. B |