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Home >> Toyota >> 2017 >> Sienna LE, AWD >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Vehicle Stability Control System - Diagnostic Codes (2 Of 2) & Symptom Tests >> Vehicle Stability Control System >> Diagnostic Codes >> DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM; DTC U0124: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module [11/2017 - ] >> Description
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DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM; DTC U0124: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module [11/2017 - ]: Description

The skid control ECU (brake actuator assembly) receives signals from the ECM, steering angle sensor (spiral cable with sensor sub-assembly) and yaw rate and acceleration sensor (airbag sensor assembly) via the CAN communication system.

DTC No. DTC Detection Condition Trouble Area
U0073 Any of the following is detected:
  1. A bus OFF state occurs once or more within 0.1 seconds, 10 times in succession. (Sent signals cannot be received.)
  2. When the +BS terminal voltage is between 10 and 17.4 V, a delay in receiving data from the yaw rate sensor and steering angle sensor continues for 1 second or more.
  3. When the +BS terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession within 60 seconds.
    • The condition that a delay in receiving data from the yaw rate sensor and steering angle sensor occurs more than once within 5 seconds.
 CAN communication system
U0100 When the +BS terminal voltage is between 10 and 17.4 V, and the vehicle speed is 15 km/h (9 mph) or more, data cannot be received from the ECM for 2 seconds or more.
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • ECM
U0124 Any of the following is detected:
  1. When the +BS terminal voltage is between 10 and 17.4 V, and the vehicle speed is 7 km/h or more, data from the acceleration sensor cannot be received for 1 second or more.
  2. When the +BS terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession within 60 seconds.
    • The condition that data from the acceleration sensor cannot be received occurs once or more within 5 seconds.
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • Acceleration sensor (yaw rate and acceleration sensor)
U0126 Any of the following is detected:
  1. When the +BS terminal voltage is between 10 and 17.4 V, data from the steering angle sensor cannot be received for 1 second or more.
  2. When the +BS terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession.
    • The condition that data from the steering angle sensor cannot be received occurs once or more within 5 seconds.
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • Steering angle sensor (Spiral cable with sensor sub-assembly)
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