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Home >> Nissan-Datsun >> 2002 >> Sentra SE-R, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transaxle Re4F03B) >> Diagnostic Trouble Code Definitions >> DTC P0731: A/T 1ST Gear Function >> Diagnostic Procedure
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Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK SHIFT SOLENOID VALVE 
    1. Remove control valve assembly. Refer to REMOVAL .
    2. Check shift solenoid valve operation.
      • Shift solenoid valve A
      • Shift solenoid valve B

    Refer to COMPONENT INSPECTION .

    Fig 1: Checking Shift Solenoid Valve Operation
    G02015708Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO 2.
    2. NG: Repair or replace shift solenoid valve assembly.

  2. CHECK CONTROL VALVE 
    1. Disassemble control valve assembly. Refer to DISASSEMBLY .
    2. Check to ensure that:
      • Valve, sleeve and plug slide along valve bore under their own weight.
      • Valve, sleeve and plug are free from burrs, dents and scratches.
      • Control valve springs are free from damage, deformation and fatigue.
      • Hydraulic line is free from obstacles.

    OK or NG 

    1. OK: GO TO 3.
    2. NG: Repair control valve assembly.

    Fig 2: Checking Control Valve
    G02015709Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK DTC 

    Perform DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE .

    OK or NG 

    1. OK: INSPECTION END 
    2. NG: Check control valve again. Repair or replace control valve assembly.