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Home >> Infiniti >> 2012 >> QX56 AWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Security Control System >> DTC/Circuit Diagnosis >> DTC B209F: Cranking Request Circuit >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

NOTE:
  • DTC B209F can be detected even though the related circuit is not used in this vehicle.
  • If DTC B209F is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to "DTC LOGIC ".
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B209F CRANK REQ CIR OPEN When the following items do not match, a malfunction is detected.
  • Cranking request signal from ECM
  • Starter control relay control signal from ECM (CAN)
  • Harness or connectors (CAN communication line is open or shorted.)
  • Harness or connectors (Cranking request signal circuit is open or shorted.)
  • IPDM E/R
  • ECM
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