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Home >> Infiniti >> 2009 >> FX35 AWD >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control System (With Rear Active Steer) >> Component Diagnosis >> DTC C1921: Engine Speed Signal >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

DTC DETECTION LOGIC

DTC Display items Malfunction detected condition Possible cause
C1921 ENG REV SIGNAL Malfunction is detected in engine speed signal that is output from ECM via CAN communication. Improper signal is input engine speed.
  • ECM
  • CAN communication line
  • RAS control unit
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