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C11A0, C1336 BRC-73 < COMPONENT DIAGNOSIS > [VDC/TCS/ABS] C D E G H I J K L M A B BRC N O P C11A0, C1336 Description INFOID:0000000004212651 The brake ECU receives signals from the yaw rate/side/decel G sensor through the CAN communication sys- tem. The yaw rate sensor has the built in acceleration sensor and detects the vehicle ′s condition using 2 circuits (GL1, GL2). If there is trouble in the bus lines between the yaw rate/side/decel G sensor and the CAN communication sys- tem, the DTCs U0123 (yaw rate sensor communication trouble) and U0124 (acceleration sensor communica- tion trouble) are output. The DTCs are also output when the calibration has not been completed. DTC Logic INFOID:0000000004212652 Diagnosis Procedure INFOID:0000000004212653 CAUTION: When replacing the brake ECU, perform initialization of the linear solenoid valve and calibration. NOTE: When U0123, U0124 or U0126 is output along with C11A0 or C1336, inspect and repair trouble areas indi- cated by U0123, U0124 or U0126 first. 1. PERFORM ZERO POINT CALIBRATION OF YAW RATE/SIDE/DECEL G SENSOR Perform zero point calibration of the yaw rate/side/decel G sensor. >> GO TO 2. 2. RECONFIRM DTC 1. Turn the ignition switch OFF. 2. Clear the DTC. 3. Turn the ignition switch ON. 4. Check if the same DTC is recorded. Result DTC INF code Display item DTC detection condition Trouble area C11A0 — YAW RATE SN CALIB Yaw rate sensor zero point calibration is unfin- • Brake ECU sensor • Zero point calibration undone C1336 — G SEN CALIB When either of the following is detected. Vehicle speed increases with unfinished 2. Zero point calibration is not within speci- • Brake ECU sensor • Zero point calibration undone Condition Proceed to DTCs (C11A0 and/or C1336) are output. A DTCs (C11A0 and/or C1336) are not output. B |