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Home >> Infiniti >> 2008 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS P1148 To P2A03 >> DTC P1564: ASCD Steering Switch >> On Board Diagnosis Logic

On Board Diagnosis Logic

NOTE: If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to "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
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