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Home >> Infiniti >> 2004 >> I35 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle >> DTC P0731: A/T 1ST Gear Function >> Diagnostic Trouble Code (DTC) Confirmation Procedure >> Testing Condition:

Testing Condition:

Always drive vehicle on a level road to improve the accuracy of test. 

After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-II 

  1. Start engine and select "DATA MONITOR" mode for "A/T" with CONSULT-II.
  2. Make sure that output voltage of A/T fluid temperature sensor is within the range below.

    FLUID TEMP SEN: 0.4 - 1.5V 

    If out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to increase the voltage (cool down the fluid).

    Fig 1: Display DTC Work Support Sheet
    G00792378Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Select "1ST GR FNCTN P0731" of "DTC WORK SUPPORT" mode for "A/T" with CONSULT-II and touch "START".
  4. Accelerate vehicle to 20 to 25 km/h (12 to 16 MPH) under the following condition and release the accelerator pedal completely.

    THROTTLE POSI: Less than 1.0/8 (at all times during step 4) 

    Selector lever: D position 

    • Check that "GEAR" show "2" after releasing pedal. 
    Fig 2: Checking That Gear Show 2 After Releasing Pedal graph
    G00792379Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Depress accelerator pedal to WOT (more than 7.0/8 of "THROTTLE POSI") quickly from a speed of 20 to 25 km/h (12 to 16 MPH) until "TESTING" changes to "STOP VEHICLE" or "COMPLETED". (It will take approximately 3 seconds.)

    If the check result NG appears on CONSULT-II screen, Go to "DIAGNOSTIC PROCEDURE " .

    If "STOP VEHICLE" appears on CONSULT-II screen, go to the following step.

    • Check that "GEAR" shows "1" when depressing accelerator pedal to WOT. 
    • If "TESTING" does not appear on CONSULT-II for a long time, select "SELF-DIAG RESULTS" for "ENGINE". In case a 1st trip DTC other than P0731 is shown, refer to applicable "TROUBLE DIAGNOSIS FOR DTC". 
  6. Stop vehicle.
  7. Follow the instruction displayed. (Check for normal shifting referring to the table below.)
    Fig 3: Checking For Normal Shifting Referring To Table
    G00792380Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Make sure that "OK" is displayed. (If "NG" is displayed, refer to "DIAGNOSTIC PROCEDURE".)

Refer to "DIAGNOSTIC PROCEDURE ".

Refer to "SHIFT SCHEDULE ".

WITH GST 

Follow the procedure "With CONSULT-II".