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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1175 (Automatic Transaxle - Re4F04B) >> DTC P0720: Vehicle Speed Sensor (A/T (Revolution Sensor) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  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)
    G00901598Courtesy 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)
    G00901599Courtesy of NISSAN MOTOR CO., U.S.A.
    • Harness for short or open between TCM, ECM and revolution sensor
    • Harness for short or open between ignition switch and revolution sensor

    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.