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Home >> Nissan-Datsun >> 2002 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle Re4F04B >> DTC P0720 Vehicle Speed Sensor (A/T Revolution Sensor) >> Diagnostic Procedure

Diagnostic Procedure

  1. CHECK INPUT SIGNAL (WITH CONSULT-II)

    With CONSULT-II 

    1. Start engine.
    2. Select TCM INPUT SIGNALS in DATA MONITOR mode for A/T with CONSULT-II.
    3. Read out the value of VHCL/S SE.A/T while driving.

      Check the value changes according to driving speed.

    Fig 1: Checking Input Signal (With CONSULT-II)
    G02016675Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO  3.
    2. NG: GO TO 2.
  2. CHECK REVOLUTION SENSOR (WITH CONSULT-II)

    With CONSULT-II 

    1. Start engine.
      Fig 2: Checking Revolution Sensor (With CONSULT-II)
      G02016676Courtesy of NISSAN MOTOR CO., U.S.A.
    • Harness for short or open between TCM, ECM and revolution sensor (Main harness)

    OK or NG 

    1. OK: GO TO 3.
    2. NG: Repair or replace damaged parts.
  3. CHECK DTC

    Perform DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE .

    OK or NG 

    1. OK: INSPECTION END 
    2. NG: GO TO 4.
  4. CHECK TCM INSPECTION
    1. Perform TCM input/output signal inspection.
    2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

    OK or NG 

    1. OK: INSPECTION END 
    2. NG: Repair or replace damaged parts.
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