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Home >> Scion >> 2013 >> tC Automatic Trans >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Vehicle Stability Control System (Diagnostic Codes & Symptom Tests) >> Vehicle Stability Control System >> DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0124: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module >> Description
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DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0124: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module: Description

The skid control ECU receives signals from the ECM, the steering angle sensor and the yaw rate and acceleration sensor via the CAN communication system.

DTC Code DTC Detection Condition Trouble Area
U0073 One of the following conditions is met:
  1. When the IG1 terminal voltage is between 10 and 17.4 V, after the output of data from the skid control ECU is completed, the sending operation continues for 5 seconds or more.
  2. The condition that the bus OFF state occurs once or more within 0.1 seconds occurs 10 times in succession (sent signals cannot be received).
  3. When the IG1 terminal voltage is between 10 and 17.4 V, a delay in receiving data from the yaw rate and acceleration sensor and the steering angle sensor continues for 1 second or more.
  4. When the IG1 terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession.
    • The condition that a delay in receiving data from the yaw rate and acceleration sensor and the steering angle sensor occurs more than once within 5 seconds.
 CAN communication system
U0100 When the IG1 terminal voltage is between 10 and 17.4 V, and the vehicle speed 15 km/h (9 mph) or more, data cannot be received from the ECM for 2 seconds or more. CAN communication system
U0123 Either condition is met:
  1. When the IG1 terminal voltage is between 10 and 17.4 V, data from the yaw rate sensor cannot be received for 1 second or more.
  2. When the IG1 terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession.
    • The condition that data from the yaw rate sensor cannot be received occurs once or more within 5 seconds.
 CAN communication system
U0124 Either condition is met:
  1. When the IG1 terminal voltage is between 10 and 17.4 V, data from the acceleration sensor cannot be received for 1 second or more.
  2. When the IG1 terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession.
    • The condition that data from the acceleration sensor cannot be received occurs once or more within 5 seconds.
 CAN communication system
U0126 Either condition is met:
  1. When the IG1 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 IG1 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
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