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Home >> Nissan-Datsun >> 2017 >> Maxima SL >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 4) >> DTC/Circuit Diagnosis >> DTC P1564: ASCD Steering Switch >> DTC Description >> DTC Detection Logic
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DTC Detection Logic

  1. An excessively high voltage signal from the ASCD steering switch is sent to ECM.
  2. ECM detects that input signal from the ASCD steering switch is out of the specified range.
  3. ECM detects that the ASCD steering switch is stuck ON.
DTC CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
P1564 ASCD SW
(ASCD steering switch)
1 Diagnosis condition -
Signal (terminal) ASCD steering switch signal
Threshold An excessively high voltage signal from the ASCD steering switch is sent to ECM
Diagnosis delay time -
2 Diagnosis condition -
Signal (terminal) ASCD steering switch signal
Threshold ECM detects that input signal from the ASCD steering switch is out of the specified range
Diagnosis delay time -
3 Diagnosis condition -
Signal (terminal) ASCD steering switch signal
Threshold ECM detects that the ASCD steering switch is stuck ON
Diagnosis delay time -