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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 (brake actuator assembly), the relay contact turns on and the stop light comes on.

DTC Code DTC Detection Condition Trouble Area
C1380 One of the following is detected:
  1. STP is ON and STP2 is OFF for 2 seconds or more when the voltage at terminal IG1 is 9.5 V or higher and the stop light blink output (EXO) is OFF.
  2. STP is OFF and STP2 is OFF for 2 seconds or more when the voltage at terminal IG1 is 9.5 V or higher, STPO is ON and EXO is OFF.
  3. STP is OFF and STP2 is ON for 2 seconds or more when the voltage at terminal IG1 is 9.5 V or higher, STPO is OFF and EXO is OFF.
  • P/I-B NO. 1 fuse
  • Harness or connector
  • Skid control ECU (Brake actuator assembly)
  • No. 2 integration relay