DTC U0242: Lost Communication With Headlamp Control Module "B" [10/2017 - 09/2019]: Description
WARNING: This page is about a different car, the 2019 Toyota C-HR and 2018 Toyota C-HR. However, it is still accessible from the selected car via links, so may be relevant.
The headlight ECU sub-assembly LH stores this DTC when the headlight ECU sub-assembly RH detects an internal malfunction or if a communication malfunction occurs between headlight ECU sub-assembly LH and headlight ECU sub-assembly RH for 10 seconds or more.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| U0242 | Lost Communication With Headlamp Control Module "B" | Any of the following conditions is met:
|
|
- |
DTC DETECTION CONDITIONS:
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | Ignition switch ON | ◦ | ◦ |
| Malfunction Status | Headlight ECU sub-assembly RH internal malfunction | ◦ | - |
| Communication malfunction occurs between headlight ECU sub-assembly LH and headlight ECU sub-assembly RH | - | ◦ | |
| Detection Time | - | 10 seconds or more | |
| Number of Trips | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.