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Home >> Toyota >> 2021 >> 4Runner TRD Off-Road >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Vehicle Stability Control System (For Vacuum Brake Booster) - Diagnostic Codes (B1380-U0074) & Symptom Tests >> VEHICLE STABILITY CONTROL SYSTEM (for Vacuum Brake Booster) >> DTC C1426: Stop Light Switch OFF Stuck Malfunction [08/2015 - 08/2019] >> Description

DTC C1426: Stop Light Switch OFF Stuck Malfunction [08/2015 - 08/2019]: Description

The skid control ECU (brake actuator assembly) inputs stop light switch signals and brake operation condition.

The skid control ECU (brake actuator assembly) has an open detection circuit, which stores this DTC when detecting an open in the stop light input line or the ground line of the stop light circuit with the stop light switch off (brake pedal not depressed).

DTC No. DTC Detection Condition Trouble Area
C1426 When the brake pedal load sensing switch is on, the master cylinder pressure is 2 MPa or higher and the deceleration calculated from the vehicle speed is 0.2 G or more, the stop light switch is off for 2 seconds or more.
  • STOP fuse
  • Stop light switch assembly
  • Stop light switch circuit
  • Skid control ECU (Brake actuator assembly)
  • Brake pedal load sensing switch (Brake with switch pedal sub-assembly)