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Home >> Toyota >> 2021 >> Mirai Limited >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System - Diagnostic Codes (3 Of 4) >> Electronically Controlled Brake System >> DTC C1380-7F: Stop Lamp Relay Actuator Stuck Off [12/2023 - ] >> Description

DTC C1380-7F: Stop Lamp Relay Actuator Stuck Off [12/2023 - ]: Description

Refer to DTC C1380-7E.

Refer to DTC C1380-7E: Stop Lamp Relay Actuator Stuck On [12/2023 - ] 

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority Note
C1380-7F Stop Lamp Relay Actuator Stuck Off w/ Front LiDAR Sensor:
Either of the following is detected:
  • When the IG1 terminal voltage exceeds 10 V and the +BS terminal voltage is from 9.5 to 17.4 V, stop light drive output (STPO) is ON, STP is OFF and STP2 is OFF continuously for 2 seconds or more.
  • When the IG1 terminal voltage exceeds 10 V and the +BS terminal voltage is from 9.5 to 17.4 V, STP2 is OFF and STP is ON continuously for 5 seconds or more.

w/o Front LiDAR Sensor:
Either of the following is detected:
  • When the IG1 terminal voltage exceeds 10 V and the +BS terminal voltage is from 9.5 to 17.4 V, stop light drive output (STPO) is ON, STP is OFF and STP2 is OFF continuously for 2 seconds or more.
  • When the IG1 terminal voltage exceeds 10 V and the +BS terminal voltage is from 9.5 to 17.4 V, STP is OFF and STP2 is ON continuously for 5 seconds or more.
  • Wire harness and connector
  • Stop light switch assembly
  • No. 2 skid control ECU (brake actuator assembly)
  • No. 2 semiconductor power integration ECU*
  • STP circuit
  • STP2 circuit
Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)

*: w/ Front LiDAR Sensor