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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1175 (Automatic Transaxle - Re4F04B) >> Trouble Diagnosis For Symptoms >> 21. TCM Self-diagnosis Does Not Activate {Park/neutral Position (PNP), Overdrive Control and Throttle Position Sensor [Accelerator Pedal Position (APP) Sensor] Switches Circuit Checks} >> 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.
NOTE: The diagnostic procedure includes inspections for the overdrive control switch circuits.
  1. CHECK PARK/NEUTRAL POSITION (PNP) SWITCH CIRCUIT (WITH CONSULT-II) 

    With CONSULT-II 

    1. Turn ignition switch to ON position.

      (Do not start engine.)

    2. Select "TCM INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
    3. Read out P/N, R, D, 2 and 1 position switches moving selector lever to each position.

      Check that the signal of the selector lever position is indicated properly.

    OK or NG 

    1. OK: GO TO  5.
    2. NG: GO TO 2.
    Fig 1: Checking Park/Neutral Position (PNP) Switch Circuit (With Consult-II)
    G00901860Courtesy of NISSAN MOTOR CO., U.S.A.
  2. DETECT MALFUNCTIONING ITEM 

    Check the following items:

    • Park/neutral position (PNP) switch
    • Check continuity between park/neutral position (PNP) switch F29 terminals 1 (G/OR) and 2 (B) and between terminals 3 (Y) and 4 (OR), 5 (L), 6 (W/G), 7 (BR/W), 8 G/W), 9 (G) while moving manual shaft through each position.
      Fig 2: Checking Continuity Of PNP Switch (1 Of 2)
      G00901861Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 3: Checking Continuity Of PNP Switch (2 Of 2)
      G00901862Courtesy of NISSAN MOTOR CO., U.S.A.
    • If NG, check again with manual control cable disconnected from manual shaft of A/T assembly. Refer to step a.
    • If OK on step b, adjust manual control cable. Refer to "CONTROL CABLE ADJUSTMENT ".
    • If NG on step b, remove park/neutral position (PNP) switch from A/T and check continuity of park/neutral position (PNP) switch terminals. Refer to step a.
    • If OK on step d, adjust park/neutral position (PNP) switch. Refer to "PARK/NEUTRAL POSITION (PNP) SWITCH ADJUSTMENT ".
    • If NG on step d, replace park/neutral position (PNP) switch.
    • Harness for short or open between ignition switch and park/neutral position (PNP) switch (Main harness)
    • Harness for short or open between park/neutral position (PNP) switch and TCM (Main harness)

    OK or NG 

    1. OK: GO TO  5.
    2. NG: Repair or replace damaged parts.
  3. CHECK PARK/NEUTRAL POSITION (PNP) SWITCH CIRCUIT (WITHOUT CONSULT-II) 

    Without CONSULT-II 

    1. Turn ignition switch to ON position. (Do not start engine.)
    2. Check voltage between TCM terminals 26 (OR), 27 (L), 34 (W/G), 35 (G/W), 36 (BR/W) and ground while moving selector lever through each position.
      Fig 4: Checking Park/Neutral Position (PNP) Switch Circuit (Without Consult-II) (1 Of 2)
      G00901863Courtesy of NISSAN MOTOR CO., U.S.A.
      1. Voltage: 
      2. B: Battery voltage 
      3. 0: 0V 
      Fig 5: Checking Park/Neutral Position (PNP) Switch Circuit (Without Consult-II) (2 Of 2)
      G00901864Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO  6.
    2. NG: GO TO 4.
  4. DETECT MALFUNCTIONING ITEM 

    Check the following items:

    • Park/neutral position (PNP) switch
    • Check continuity between park/neutral position (PNP) switch F29 terminals 1 (G/OR) and 2 (B) and between terminals 3 (Y) and 4 (OR), 5 (L), 6 (W/G), 7 (BR/W), 8 G/W), 9 (G) while moving manual shaft through each position.
      Fig 6: Checking Resistance Of Park Neutral Position Switch (1 Of 2)
      G00901865Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 7: Checking Resistance Of Park Neutral Position Switch (2 Of 2)
      G00901866Courtesy of NISSAN MOTOR CO., U.S.A.
    • If NG, check again with manual control cable disconnected from manual shaft of A/T assembly. Refer to step a.
    • If OK on step b, adjust manual control cable. Refer to "CONTROL CABLE ADJUSTMENT ".
    • If NG on step b, remove park/neutral position (PNP) switch from A/T and check continuity of park/neutral position (PNP) switch terminals. Refer to step a.
    • If OK on step d, adjust park/neutral position (PNP) switch. Refer to "PARK/NEUTRAL POSITION (PNP) SWITCH ADJUSTMENT ".
    • If NG on step d, replace park/neutral position (PNP) switch.
    • Harness for short or open between ignition switch and park/neutral position (PNP) switch (Main harness)
    • Harness for short or open between park/neutral position (PNP) switch and TCM (Main harness)

    OK or NG 

    1. OK: GO TO  7.
    2. NG: Repair or replace damaged parts.
  5. CHECK OVERDRIVE CONTROL SWITCH CIRCUIT (WITH CONSULT-II) 

    With CONSULT-II 

    1. Turn ignition switch to ON position.

      (Do not start engine.)

    2. Select "TCM INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
    3. Read out "OVERDRIVE SW".

      Check the signal of the overdrive control switch is indicated properly.

      (Overdrive control switch "ON" displayed on CONSULT-II means overdrive "OFF".)

    OK or NG 

    1. OK: GO TO  7.
    2. NG: GO TO 6.
    Fig 8: Checking Overdrive Control Switch Circuit (With Consult-II)
    G00901867Courtesy of NISSAN MOTOR CO., U.S.A.
  6. DETECT MALFUNCTIONING ITEM 

    Check the following items:

    • Overdrive control switch M44.
    • Check continuity between terminals 1 and 2.
      Fig 9: Checking Continuity Between Terminal 1 And 2 Of Overdrive Control Switch M44 (1 Of 2)
      G00901868Courtesy of NISSAN MOTOR CO., U.S.A.
    • Harness for short or open between TCM and overdrive control switch (Main harness)
    • Harness of ground circuit for overdrive control switch (Main harness) for short or open

    OK or NG 

    1. OK: GO TO 7.
    2. NG: Repair or replace damaged parts.
    Fig 10: Checking Continuity Between Terminal 1 And 2 Of Overdrive Control Switch M44 (2 Of 2)
    G00901869Courtesy of NISSAN MOTOR CO., U.S.A.
  7. CHECK THROTTLE POSITION SENSOR [ACCELERATOR PEDAL POSITION (APP) SENSOR] 

    OK or NG 

    1. OK: GO TO 8.
    2. NG: Repair or replace damaged parts.
  8. CHECK TCM INSPECTION 
    1. perform TCM input/output inspection. Refer to "INPUT/OUTPUT SIGNAL CHART ".

    OK or NG 

    1. OK: INSPECTION END.
    2. NG: Inspect TCM terminals and related wiring harnesses for damage or loose connections. Repair or replace damaged parts.
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