DTC U0073/86 Control Module Communication Bus OFF; DTC U0100/85 Lost Communication with ECM / PCM "A"; DTC U0126/84 Lost Communication with Steering Angle Sensor Module; DTC U0129/83 Lost Communication with Brake System Control Module: Description
WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
- The 4WD control ECU inputs the signals sent from the ECM, skid control ECU, and steering angle sensor via the CAN communication system.
- When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.
DTC DETECTION CONDITION AND TROUBLE AREA
| DTC No. |
DTC Detection Condition |
Trouble Aria |
| U0073/86 |
- When the following continues for 5 seconds or more:
- Signals from the 4WD control ECU are not received.
- When the following occurs 10 times consecutively:
- A communication malfunction (bus off) occurs one or more times within 0.1 second.
|
- Wire harness (CANL, CANH circuit)
- 4WD control ECU
|
| U0100/85 |
- When both of the following continue for 2 seconds or more:
- The voltage of the IG1 terminal is 10 V or more.
- At a vehicle speed of 60 km/h (38 mph) or more, communication with the ECM cannot be performed
|
- Wire harness (CANL, CANH circuit)
- 4WD control ECU
- ECM
|
| U0126/84 |
- When both of the following continue for 1 second or more:
- The voltage of the IG1 terminal is 10 V or more.
- Communication with the steering angle sensor cannot be performed.
- When all of the following occur 10 times consecutively:
- The condition that communication with the steering angle sensor cannot be performed occurs once within 5 seconds
- The voltage of the IG1 terminal is 10 V or more.
- Occurs 10 times or more within 60 seconds.
|
- Wire harness (CANL, CANH circuit)
- 4WD control ECU
- Steering angle sensor
|
| U0129/83 |
- When the following continues for 3 seconds or more:
- The voltage of the IG1 terminal is 10 V or more.
- Communication with the skid control ECU cannot be performed.
|
- Wire harness (CANL, CANH circuit)
- 4WD control ECU
- Skid control ECU
|