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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Automatic Transaxle) >> Trouble Diagnosis For Symptoms >> 21. TCM Self-diagnosis Does Not Activate (PNP & 3 Position Switches Circuit Checks), and Throttle Position Sensor [Accelerator Pedal Position (APP) Sensor] Circuit Check >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.
NOTE: The diagnostic procedure includes inspection for the 3 position switch circuit.
  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: Scan Tool Display "Data Monitor"
      G02886815Courtesy 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) and 2 (G) and between terminals 3 (GY) and 4 (PU/W), 5 (P/B), 6 (G), 7 (BR), 8 (G/W) and 9 (GY/R) while moving manual shaft through each position.
        LEVER POSITION AND TCM TERMINALS VOLTAGE SPECIFICATIONS

        Lever position Terminal No.
        P 3 - 7 1 - 2
        R 3 - 8  
        N 3 - 9 1 - 2
        D 3 - 6  
        2 3 - 5  
        1 3 - 4  
        Fig 2: Park/Neutral Position (PNP) Switch F29 Terminals 1 & 2 & Between Terminals 3, 4, 5, 6, 7, 8 & 9 Continuity Test
        G02886816Courtesy 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 (PU/W), 27 (P/B), 34 (G), 35 (G/W), 36 (R/B) and ground while moving selector lever through each position.
      Fig 3: Lever Position & TCM Terminals Voltage Specifications
      G02886817Courtesy of NISSAN MOTOR CO., U.S.A.

      Voltage: 

      B: Battery voltage 

      0: 0V 

    OK or NG

    1. OK: GO TO  6.
    2. NG: GO TO 4.
      Fig 4: PNP Switch Circuit (Without CONSULT-II) Voltage Test
      G02886818Courtesy of NISSAN MOTOR CO., U.S.A.
  4. DETECT MALFUNCTIONING ITEM 

    Check the following items:

    • Park/neutral position (PNP) switch
      • Check continuity between park/neutral position (PNP) switch terminals 1 (G) and 2 (G), and between terminals 3 (G/Y) and 4 (PU/W), 5 (P/B), 6 (G), 7 (BR), 8 (G/W) and 9 (GY/R) while moving manual shaft through each position.
        LEVER POSITION AND TCM TERMINALS VOLTAGE SPECIFICATIONS

        Lever position Terminal No.
        P 3 - 7 1 - 2
        R 3 - 8  
        N 3 - 9 1 - 2
        D 3 - 6  
        2 3 - 5  
        1 3 - 4  
        Fig 5: PNP Switch Terminals Continuity Test
        G02886819Courtesy 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 3 POSITION 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 3 position switch is indicated properly. (Overdrive switch "ON" displayed on CONSULT-II means overdrive "OFF".)

    OK or NG

    1. OK: GO TO  7.
    2. NG: GO TO 6.
      Fig 6: Scan Tool Display "Data Monitor"
      G02886820Courtesy of NISSAN MOTOR CO., U.S.A.
  6. DETECT MALFUNCTIONING ITEM 

    Check the following items:

    • 3 position switch M34.

      Check for continuity between terminals 1 (L/W) and 2 (B) with selector lever in 3 position.

    • Harness for short or open between meter and 3 position switch (Main harness)
    • Harness of ground circuit for 3 position switch (Main harness) for short or open

    OK or NG

    1. OK: GO TO 7.
    2. NG: Repair or replace damaged parts.
      Fig 7: 3 Position Switch Terminals 1 & 2 Continuity Test
      G02886821Courtesy 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 "TCM INSPECTION TABLE "

    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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