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Home >> Genesis >> 2021 >> G90 5.0 Ultimate, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Control System Diagnosis - 3.3L (6 Of 9)) >> DTC P0504-00: Brake Switch 'A'/'B' Correlation >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy Case 1
  • Comparing 2 brake signals during driving
  1. Poor connection
  2. Open or short in Stop lamp switch
  3. Faulty Stop lamp switch
Case 2
  • ECM detects stop lamp input signal when vehicle stops
Enable Conditions Case 1
  • Engine running
  • Vehicle Speed Sensor is abnormal.
  • Engine running
  • Vehicle Speed Sensor is normal and Vehicle Speed is over 20 kph (12.4 mph) during 1 sec or more.
Case 2
  • Engine running
  • Vehicle Speed Sensor is normal and Vehicle Speed is over 20 kph (12.4 mph) during 1 sec or more.
Threshold Value Case 1
  • The one brake signal's change duration when another signal has been changed longer than 0.5 sec.
Case 2
  • Vehicle speed less than 3 kph (1.8 mph)
  • Vehicle acceleration slower than -6 kph/s
  • Stop lamp "OFF" and no change of the stop lamp signal for more 3
Diagnosis Time
  • Continuous
MIL On Condition
  • No MIL On (DTC only)