DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module [08/2019 - ]: Description
The 4WD ECU assembly receives signals from the ECM, skid control ECU (brake actuator assembly) and steering sensor via CAN communication.
When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.
| DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
| U0100 |
Lost Communication with ECM / PCM "A" |
- When both of the following continue for 2 seconds or more:
- The IG 1 terminal voltage is 10 V or more.
- At a vehicle speed of 60 km/h (38 mph) or more, communication with the ECM cannot be performed.
|
- CAN communication system
- 4WD ECU assembly
- ECM
|
| U0126 |
Lost Communication with Steering Angle Sensor Module |
- When both of the following continue for 1 second or more:
- The IG 1 terminal voltage is 10 V or more.
- Communication with the steering sensor cannot be performed.
- When all of the following occur 10 times consecutively:
- The IG 1 terminal voltage is 10 V or more.
- A communication malfunction with the steering sensor occurs once within 5 seconds, 10 times or more within 60 seconds.
|
- CAN communication system
- 4WD ECU assembly
- Steering sensor
|
| U0129 |
Lost Communication with Brake System Control Module |
- When the following continues for 3 seconds or more:
- The IG 1 terminal voltage is 10 V or more.
- Communication with the skid control ECU (brake actuator assembly) cannot be performed.
|
- CAN communication system
- 4WD ECU assembly
- Skid control ECU (Brake actuator assembly)
|