DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0125: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module [08/2019 - ]: Description
The driving support ECU assembly uses the millimeter wave radar sensor assembly to detect objects in front of the vehicle. Based on signals from the millimeter wave radar sensor assembly, the driving support ECU assembly sends pre-collision system control operation signals. These DTCs are stored when a communication malfunction occurs between ECUs that perform pre-collision system control.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U0100 | Lost Communication with ECM / PCM "A" | When the vehicle is being driven at a speed of 5 km/h (4 mph) or more, a communication error between the ECM and the driving support ECU assembly is detected for approximately 5 seconds. |
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| U0125 | Lost Communication with Yaw Rate Sensor Module | When the engine switch is on (IG), a communication error between the yaw rate sensor (center airbag sensor assembly) and the driving support ECU is detected for approximately 1 second or more. |
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| U0126 | Lost Communication with Steering Angle Sensor Module | When the engine switch is on (IG), a communication error between the steering sensor and the driving support ECU assembly is detected for approximately 4 seconds or more. |
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| U0129 | Lost Communication with Brake System Control Module | When the engine switch is on (IG), a communication error between the skid control ECU (master cylinder solenoid) and the driving support ECU assembly is detected for approximately 3 seconds or more. |
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