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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> ESC/AHB Diagnosis (HEV) >> DTC C1542-01: Brake Switch Circuit Error >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible cause
DTC Strategy
  • Brake switch signal monitoring
  1. Short to power in brake switch
  2. Open or short to ground in brake switch
  3. Defected brake switch
  4. Defected IBAU
Enable Conditions Case 1
  • Brake switch is "ON" for 6 minutes under vehicle speed is over 12.5 mph (20 km/h), brake pedal value is less than 6 mm, change in brake pedal value is less than 2 mm, and brake pedal pressure is less than 0.5 bar condition. (Short to power)
Case 2
  • Brake switch is "OFF" for 3 sec. under brake pedal value is over 25 mm, change in brake pedal value is over 5 mm and brake pedal pressure is more than 5 bar condition. (Open or short to ground)
MIL
  • The RBS/ESP (ESC) warning lamp is activated.
Reset condition
  • After ignition switch turned off and on again and Brake Pressed and Released.