Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Infiniti >> 2009 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1140 To P2A03 >> DTC P1574: ASCD Vehicle Speed Sensor >> On Board Diagnosis Logic

On Board Diagnosis Logic

NOTE:
  • If DTC P1574 is displayed with DTC U1000, U1001, first perform the trouble diagnosis for DTC U1000, U1001. Refer to "DTC CONFIRMATION PROCEDURE ".
  • If DTC P1574 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer to "ON BOARD DIAGNOSIS LOGIC ".
  • If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer to "ON BOARD DIAGNOSIS LOGIC ".
  • If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to "ON BOARD DIAGNOSIS LOGIC ".
DTC DETECTING CONDITION AND POSSIBLE CAUSE REFERENCE CHART

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.)
  • Combination meter
  • ABS actuator and electric unit (control unit)
  • Wheel sensor
  • TCM
  • ECM
scientia non olet · About Mike's Workshop Manuals