Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2012PRIUS THREEREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLELECTRONICALLY CONTROLLED BRAKE SYSTEM (EXCEPT PLUG-IN) (DIAGNOSTIC CODES & SYMPTOM TESTS)ELECTRONICALLY CONTROLLED BRAKE SYSTEMDTC C1380/64: STOP LIGHT CONTROL RELAY MALFUNCTIONDESCRIPTION
2012 Toyota Prius Three
DTC C1380/64: Stop Light Control Relay Malfunction: Description
2012 Toyota Prius ThreeSECTION Description
Upon receiving the dynamic radar cruise control system operating signal from the skid control ECU, the relay contact turns on and the stop light comes on.
| DTC Code | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1380/64 | 761 | When the voltage at the IG1 terminal is 9.5 V or more and the stop light control relay drive output (STP0) is ON, a signal is not input to the STP2 terminal for 2 seconds or more. |
|
| ↑ | 762 | When the voltage at the IG1 terminal is 9.5 V or more and the stop light control relay drive output (STP0) is OFF, the signal at the STP terminal is different from the input signal at the STP2 for 5 seconds or more. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.