Dtc U0073/94 Control Module Communication Bus Off


DESCRIPTION

INSPECTION PROCEDURE

RECONFIRM DTC

DTC U0073/94 Control Module Communication Bus OFF

DTC U0100/65 Lost Communication with ECM / PCM

DTC U0123/62 Lost Communication with Yaw Rate Sensor Module

DTC U0124/95 Lost Communication with Lateral Acceleration Sensor Module

DTC U0126/63 Lost Communication with Steering Angle Sensor Module


DESCRIPTION


DTC Code
DTC Detection Condition
Trouble Area
U0073/94
When one of the following conditions is met:
  1. With the IG1 terminal voltage between 10 and 17.4 V, after the output of data from the skid control ECU is completed, transmission continues for 5 seconds or more.
  2. The condition that the bus OFF state occurs at least once within 0.1 seconds occurs 10 times in succession. (Signals cannot be received.)
  3. With the IG1 terminal voltage between 10 and 17.4 V, a delay in receiving data from the yaw rate and acceleration sensor and steering angle sensor continues for 1 second or more.
  4. With the IG1 terminal voltage between 10 and 17.4 V, the following occurs 10 times in succession.
    1. The condition that a delay in receiving data from the yaw rate and acceleration sensor and steering angle sensor occurs more than once within 5 seconds.
CAN communication system
U100/65
When all conditions below are met:
  1. IG1 terminal voltage is between 10 and 17.4 V.
  2. The vehicle speed is 15 km/h (9 mph) or more.
  3. Data cannot be sent to or received from the ECM for 2 seconds or more.
CAN communication system
U0123/62
When either condition below is met:
  1. With the IG1 terminal voltage between 10 and 17.4 V, data from the yaw rate sensor cannot be received for 1 second or more.
  2. With the IG1 terminal voltage between 10 and 17.4 V, the following occurs 10 times in succession.
    1. The condition that data from the yaw rate sensor cannot be received occurs at least once within 5 seconds.
CAN communication system
U0124/95
When either condition below is met:
  1. With the IG1 terminal voltage between 10 and 17.4 V, data from the acceleration sensor cannot be received for 1 second or more.
  2. With the IG1 terminal voltage between 10 and 17.4 V, the following occurs 10 times in succession.
    1. The condition that data from the acceleration sensor cannot be received occurs at least once within 5 seconds.
CAN communication system
U0126/63
When either condition below is met:
  1. With the IG1 terminal voltage between 10 and 17.4 V, data from the steering angle sensor cannot be received for 1 second or more.
  2. With the IG1 terminal voltage between 10 and 17.4 V, the following occurs 10 times in succession.
    1. The condition that data from the steering angle sensor cannot be received occurs at least once within 5 seconds.
CAN communication system

INSPECTION PROCEDURE

1.RECONFIRM DTC

  1. Clear the DTC(s) (Toyota Fortuner RM000000XHV09NX.html).

  1. Check if the same DTC(s) is output.

    Result
    Result
    		Proceed to
    DTC output
    		A
    DTC not output
    		B



B
CHECK FOR INTERMITTENT PROBLEMS
A

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)