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DTC C1380: Stop Light Control Relay Malfunction: Description

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 condition is met:
  1. 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 is not input to the STP2 terminal for 5 seconds or more.
  2. 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 STP terminal is different from the input signal at the STP2 terminal for 5 seconds or more.
  • STOP fuse
  • Harness or connector
  • STOP LP relay
  • Stop light control relay
  • Master cylinder solenoid (Skid control ECU)
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