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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 39 (Engine Control System Diagnosis - 1.6L (2 Of 3) (Except HEV)) >> DTC P0504: 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
  • Plausibility check
  1. Open or short circuit in harness
  2. Poor connection or damaged harness
  3. Faulty brake warning lamp or brake test switch
Enable Conditions
  • IG ON
Threshold Value
  • When brake light and brake test switch signals does not equal each other for more than 1 sec
Diagnostic Time
  • 100 sec
MIL ON Condition
  • NO MIL
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