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Home >> Toyota >> 2018 >> 4Runner TRD Pro >> 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 C1430: Brake Pedal Load Sensing Switch OFF Stuck Malfunction; DTC C1431: Brake Pedal Load Sensing Switch ON Stuck Malfunction [08/2015 - 08/2019] >> Description

DTC C1430: Brake Pedal Load Sensing Switch OFF Stuck Malfunction; DTC C1431: Brake Pedal Load Sensing Switch ON Stuck Malfunction [08/2015 - 08/2019]: Description

The brake pedal load sensing switch operates when the brake pedal is depressed with force exceeding a predetermined level.

The skid control ECU detects if the brake pedal is depressed or not via this circuit.

DTC No. DTC Detection Condition Trouble Area
C1430 Either condition is met:
  1. With the stop light switch on, the brake pedal load sensing switch off and the master cylinder pressure at 6 MPa or more, the deceleration is 0.4 G or more for 1 second or more.
  2. With the stop light switch on, the brake pedal load sensing switch off and the master cylinder pressure at 6 MPa or more, the vehicle speed is 0 km/h (0 mph) for 5 seconds or more.
  • Brake pedal load sensing switch (Brake with switch pedal sub-assembly)
  • Brake pedal load sensing switch circuit
  • Skid control ECU (Brake actuator assembly)
C1431 Either condition is met:
  1. Immediately after the ignition switch is turned to ON, the brake pedal load sensing switch is on and the stop light switch is off for 10 seconds or more.
  2. The condition that the brake pedal load sensing switch remains on while the vehicle speed increases from 0 km/h (0 mph) to 30 km/h (18 mph) occurs 5 times in succession.