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Home >> Infiniti >> 2007 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1225 To P2A03 >> DTC P1564 ASCD Steering Switch >> On Board Diagnosis Logic

On Board Diagnosis Logic

DTC DETECTING CONDITION CHART

DTC No. Trouble Diagnosis Name DTC Detecting Condition Possible Cause
P1564
1564
ASCD steering switch
  • An excessively high voltage signal from the ASCD steering switch is sent to ECM.
  • ECM detects that input signal from the ASCD steering switch is out of the specified range.
  • ECM detects that the ASCD steering switch is stuck ON.
  • Harness or connectors

    (The switch circuit is open or shorted.)

  • ASCD steering switch
  • Combination meter (spiral cable)
  • ECM