DTC C1380: Stop Light Control Relay Malfunction: Description
WARNING: This page is about a different car, the 2009 Lexus IS 350 and 2009 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
Upon receiving the hill-start assist control operating signal from the skid control ECU, the relay contact turns on and the stop light comes on.
| DTC Code |
DTC Detection Condition |
Trouble Area |
| C1380 |
Either of the following is detected:
- When the voltage at the IG1 terminal is between 10 and 14 V and the stop light control relay drive output (STPO) is ON, a signal has not been input to the STP1 terminal for 5 seconds or more.
- When the voltage at the IG1 terminal is between 10 and 14 V and the stop light control relay drive output (STPO) is OFF, the signal at the STP1 is different from the input signal at the STP2 for 5 seconds or more.
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- Stop light switch
- Stop light switch circuit
- Stop light control (BRK-LP) relay
- Stop light control (BRK-LP) relay circuit
- Brake actuator assembly (Skid control ECU)
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