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DTC B1515: Buckle Switch Driver Defect: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item Detecting Condition Possible cause
DTC Strategy
  • Check current
  • Faulty DSBBS circuit.
  • Faulty DSBBS.
  • Faulty SRSCM.
Enable Conditions
  • Ignition "ON"
Threshold Value
  • Sensor lines are cross-coupled. (D-buckle, P-buckle)
  • Input test signal to other switch, but this line voltage > 0.8V
  • 7.9mA < Sensor line current < 10.7mA
Diagnostic Time Qualification
  • Ini (Start Up):2s (200ms x 10)
  • Steady:1 time
De-Qualification
  • Ini (Start Up):4s
  • Steady:IGN off -> on
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