Toyota Corolla Cross: Control Module Communication Bus Off (U0073,U0100,U0126,U0129)

U0073

Control Module Communication Bus Off

• With the ignition switch ON, sending of the signal from the 4WD ECU assembly does not complete for 5 seconds or more.
• When the following occurs 10 times consecutively:
  • A communication malfunction (bus off) occurs one or more times within 0.1 seconds.

• CAN communication system
• 4WD ECU assembly

U0100

Lost Communication with ECM / PCM "A"

When both of the following continue for 2 seconds or more:

• The ignition switch is ON and the voltage of the IG1 terminal is 10 V or more.
• At a vehicle speed of 60 km/h (37 mph) or more, signals cannot be received from the ECM.

• CAN communication system
• 4WD ECU assembly
• ECM

U0126

Lost Communication with Steering Angle Sensor Module

• When the IG1 terminal voltage is 10 V or more, communication with the steering sensor is impossible for 1 second or more.
• When all of the following occur 10 times consecutively within 60 seconds:
  • The voltage of the IG1 terminal is 10 V or more.
  • The condition that communication with the steering sensor cannot be performed occurs once within 5 seconds.

• CAN communication system
• 4WD ECU assembly
• Steering sensor

U0129

Lost Communication with Brake System Control Module

When the IG1 terminal voltage is 10 V or more, communication with the skid control ECU (brake actuator assembly) is impossible for 3 seconds or more.

• CAN communication system
• 4WD ECU assembly
• Skid control ECU (brake actuator assembly)

1.

CHECK FOR DTC

GO TO CAN COMMUNICATION SYSTEM