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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Open circuit monitoring
  1. Open circuit in brake switch line
  2. Faulty brake light switch
  3. Faulty input stage in HECU
Enable Conditions
  • If both BLS (brake lamp switch) and BS (brake switch) have a same state and MCP (Master Cylinder Pressure) > 20bar for 500ms.
  • Outside an ABS/ESP (ESC) control, and after normal operation of MCP, If the pressure sensor signal is higher than 20bar and BLS is low for 3sec.
  • If the BLS/BS changed more than 40times and MCP > 20bar for 5sec.
  • While Vehicle speed > 10km/h, TPS > 5%, MCP < 7bar, if BLS is high over 1min.
Fail-Safe
  • Inhibit the ESP (ESC) control and allow the ABS/EBD control
  • The ESP (ESC) warning lamp is activated
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