DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 104 (Electronically Controlled Brake System (HV) - Diagnostic Codes (03 Of 11)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C0520-1C: Multi-axis Acceleration Sensor Module "A" Circuit Voltage Out of Range; DTC C0520-2A: Multi-axis Acceleration Sensor Module "A" Signal Stuck In Range; DTC C0520-96: Multi-axis Acceleration Sensor Module "A" Component Internal Failure [11/2023 - ] >> Monitor Description

Monitor Description

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C051C (Case 1): 

  1. When the vehicle stops after being driven and the output value of the acceleration sensor (airbag sensor assembly) does not change, the No. 2 skid control ECU (brake actuator assembly) judges that the acceleration sensor (airbag sensor assembly) is stuck, and illuminates the MIL and stores this DTC.

C051C (Case 2): 

  1. When the acceleration sensor (airbag sensor assembly) is stuck for a certain amount of time, the No. 2 skid control ECU (brake actuator assembly) judges that the acceleration sensor (airbag sensor assembly) is stuck, and illuminates the MIL and stores this DTC.

C051C (Case 3): 

  1. When at a certain vehicle speed or more, the difference between the longitudinal acceleration value output by the acceleration sensor (airbag sensor assembly) and the value calculated based on the vehicle speed differs by a certain value or more for a certain amount of time, the No. 2 skid control ECU (brake actuator assembly) judges that the acceleration sensor (airbag sensor assembly) is abnormal, and illuminates the MIL and stores this DTC.

C0520 (Case 1): 

  1. When the acceleration sensor output values for the longitudinal and lateral axes are outside of the possible output range for a certain amount of time, the No. 2 skid control ECU (brake actuator assembly) judges that the acceleration sensor (airbag sensor assembly) is outside of the possible output range, and illuminates the MIL and stores this DTC.

C0520 (Case 2): 

  1. When a signal indicating that the acceleration sensor (airbag sensor assembly) has detected an internal malfunction during self-diagnosis is received, the No. 2 skid control ECU (brake actuator assembly) judges that the acceleration sensor (airbag sensor assembly) has an internal malfunction, and illuminates the MIL and stores this DTC.
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