DTC C1380: Stop Light Relay Malfunction [04/2018 - 08/2020]: Description
When the skid control ECU (brake actuator assembly) applies the brakes after receiving a brake request signal from the pre-collision system, dynamic radar cruise control system, secondary collision brake system or brake hold control system, the skid control ECU (brake actuator assembly) operates the stop light control relay (stop light switch assembly) to illuminate the stop lights.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1380 | Stop Light Relay Malfunction | Either condition is met:
|
|
- *: w/ Cornering Light
DTC DETECTION CONDITIONS: C1380
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | The voltage at the +BS terminal is between 10 V or more. | ◦ | ◦ |
| Malfunction Status | When the stop light control relay (stop light switch assembly) drive output (STPO) is on, a signal is not input to the STP terminal. | ◦ | - |
| When the stop light control relay (stop light switch assembly) drive output (STPO) is off, the signal at the STP2 terminal is different from the input signal at the STP terminal. | - | ◦ | |
| Detection Time | 5 seconds or more | 5 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.