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
WARNING: This page is about a different car, the 2006 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
The skid control ECU inputs the signals from the ECM, steering angle sensor, and yaw rate and acceleration sensor via CAN communication system.
DIAGNOSIS TROUBLE CODE CHART
| DTC No. |
DTC Detection Condition |
Trouble Area |
| U0073/94 |
When either of the following is detected:
- After the output of data from the skid control ECU is completed, the sending continues for 5 seconds or more.
- The condition that bus OFF state occurs once or more within 100 ms occurs 10 times in succession. (Sent signals cannot be received.)
- With the IG1 terminal voltage 10 V or more, a delay in receiving data from the yaw rate and acceleration sensor and steering angle sensor continues for 1 second or more.
- With the IG1 terminal voltage 10 V or more, the condition that a delay in receiving data from the yaw rate and acceleration sensor occurs more than once within 5 seconds occurs 10 times in succession within 60 seconds.
|
CAN communication system |
| U0100/65 |
When either of the following is detected:
- With the IG1 terminal voltage 10 V or more and the vehicle speed 9 mph (15 km/h) or more, data cannot be sent to the ECM for 2 seconds or more.
- With the IG1 terminal voltage 10 V or more and the vehicle speed 9 mph (15 km/h) or more, data from the ECM cannot be received for 2 seconds or more.
|
CAN communication system (Skid control ECU to ECM) |
| U0123/62 |
When either of the following is detected:
- With the IG1 terminal voltage 10 V or more, data from the yaw rate sensor cannot be received for 1 second or more.
- With the IG1 terminal voltage 10 V or more, the following occurs 10 times in succession within 60 seconds.
- The condition that data from the yaw rate sensor cannot be received occurs once or more within 5 seconds.
|
CAN communication system (Skid control ECU to yaw rate and acceleration sensor) |
| U0124/95 |
When either of the following is detected:
- With the IG1 terminal voltage 10 V or more, data from the acceleration sensor cannot be received for 1 second or more.
- With the IG1 terminal voltage 10 V or more, 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 to yaw rate and acceleration sensor) |
| U0126/63 |
When either of the following is detected:
- With the IG1 terminal voltage 10 V or more, data from the steering angle sensor cannot be received for 1 second or more.
- With the IG1 terminal voltage 10 V or more, the following occurs 10 times in succession within 60 seconds.
- 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 to steering angle sensor) |