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Home >> Infiniti >> 2007 >> FX45 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1225 To P2A03 (VK45DE) >> DTC P1574 ASCD Vehicle Speed Sensor >> On Board Diagnosis Logic
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On Board Diagnosis Logic

This self-diagnosis has the one trip detection logic. 

The MIL will not light up for this diagnosis. 

NOTE:
  • If DTC P1574 is displayed with DTC U1000, U1001, first perform the trouble diagnosis for DTC U1000, U1001. Refer to "DTC U1000, U1001 CAN COMMUNICATION LINE ".
  • If DTC P1574 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to "DTC U1010 CAN COMMUNICATION ".
  • If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer to "DTC P0500 VSS "
  • If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to "DTC P0605 ECM "
DTC DETECTING CONDITION

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1574 1574 ASCD vehicle speed sensor ECM detects a difference between two vehicle speed signals is out of the specified range.
  • Harness or connectors

    (The CAN communication line is open or shorted.)

  • Unified meter and A/C amp.
  • ABS actuator and electric unit (control unit)
  • Wheel sensor
  • TCM
  • ECM
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