DTC B1244: Light Sensor Circuit Malfunction [09/2019 - ]: Description
The automatic light control sensor detects ambient light. The sensor creates an electrical signal based on the amount of light detected, and sends the signal to the main body ECU (multiplex network body ECU). The main body ECU (multiplex network body ECU) turns on or off the headlights and taillights according to the signal.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| B1244 | Light Sensor Circuit Malfunction | Any of the following conditions is met:
|
|
- |
DTC DETECTION CONDITIONS:
| Vehicle Condition | ||||
|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | ||
| Diagnosis Condition | Engine switch on (IG) | ◦ | ◦ | ◦ |
| Malfunction Status | Malfunction in automatic light control sensor | ◦ | - | - |
| Open in automatic light control sensor circuit | - | ◦ | - | |
| Short in automatic light control sensor circuit | - | - | ◦ | |
| Detection Time | - | - | - | |
| 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.