Nissan GT-R (R35) · Service Manual ENGINE

P1564 ASCD STEERING SWITCH

VR38

P1564

Description


ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation of switch, and determines which button is operated.
Refer to System Description for the ASCD function.

DTC Logic

 
 DTC DETECTION LOGIC

NOTE：
 If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to DTC Logic (GT-R certified NISSAN dealer).

DTC No.
 		Trouble diagnosis name
 		DTC detecting condition
 		Possible cause
P1564
 		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
  • ECM

 
 DTC CONFIRMATION PROCEDURE

 
 1.PRECONDITIONING
 
 2.PERFORM DTC CONFIRMATION PROCEDURE

Diagnosis Procedure


 
 1.CHECK GROUND CONNECTION
 
 2.CHECK ASCD STEERING SWITCH CIRCUIT
 
 3.CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
 
 4.DETECT MALFUNCTIONING PART
 
 5.CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
 
 6.DETECT MALFUNCTIONING PART
 
 7.CHECK ASCD STEERING SWITCH
 
 8.CHECK INTERMITTENT INCIDENT

Component Inspection


 
 1.CHECK ASCD STEERING SWITCH