DTC U1104: Lost Communication with Driving Support ECU [08/2019 - ]: Description
The driving support ECU assembly is connected to the millimeter wave radar sensor assembly, forward recognition camera and skid control ECU (master cylinder solenoid) via CAN communication. If communication with the millimeter wave radar sensor assembly, forward recognition camera or skid control ECU (master cylinder solenoid) stops, the driving support ECU assembly stores DTC U1104.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U1104 | Lost Communication with Driving Support ECU | Any of the following conditions is met:
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DTC DETECTION CONDITIONS:
| Vehicle Condition | ||||
|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | ||
| Diagnosis Condition | Engine switch is on (IG) | ◦ | ◦ | ◦ |
| Malfunction Status | A communication error between the driving support ECU assembly and the millimeter wave radar sensor assembly is detected | ◦ | - | - |
| A communication error between the driving support ECU assembly and the forward recognition camera is detected | - | ◦ | - | |
| A communication error between the driving support ECU assembly and the skid control ECU (master cylinder solenoid) is detected | - | - | ◦ | |
| Detection Time | Approximately 0.2 seconds or more | Approximately 0.3 seconds or more | Approximately 1.5 seconds or more | |
| Number of Trips | 1 trip | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.