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Diagnostic Procedure

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK SELF-DIAGNOSTIC RESULTS 

    Perform self-diagnosis. Refer to "SELF-DIAGNOSTIC RESULT MODE ".

    Is any malfunction detected by self-diagnostic results? 

    YES: Check the malfunctioning system. Refer to "SELF-DIAGNOSTIC RESULT MODE ".

    NO: GO TO 2.

  2. CHECK A/T FLUID LEVEL 

    Check A/T fluid level. Refer to "CHECKING THE A/T FLUID (ATF) ".

    OK or NG 

    OK: GO TO 3.

    NG: Refill ATF.

  3. CHECK LINE PRESSURE 

    Check line pressure at the engine stall point. Refer to "LINE PRESSURE TEST ".

    OK or NG 

    OK: GO TO  6.

    NG - 1: Line pressure high. GO TO 4.

    NG - 2: Line pressure low. GO TO  5.

  4. DETECT MALFUNCTIONING ITEM 
    1. Check control valve with TCM. Refer to "CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2 ".
    2. Disassemble A/T. Refer to "DISASSEMBLY ".
    3. Check the following.
      • Oil pump assembly. Refer to "OIL PUMP ".

    OK or NG 

    OK: GO TO  7.

    NG: Repair or replace damaged parts.

  5. DETECT MALFUNCTIONING ITEM 
    1. Check control valve with TCM. Refer to "CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2 ".
    2. Disassemble A/T. Refer to "DISASSEMBLY ".
    3. Check the following.

    OK or NG 

    OK: GO TO  7.

    NG: Repair or replace damaged parts.

  6. CHECK A/T FLUID CONDITION 
    1. Remove oil pan. Refer to "CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2 ".
    2. Check A/T fluid condition. Refer to "FLUID CONDITION CHECK ".

    OK or NG 

    OK: GO TO 7.

    NG: GO TO  10.

  7. DETECT MALFUNCTIONING ITEM 
    • Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to "SYMPTOM CHART " (Symptom No.24).

    OK or NG 

    OK: GO TO 8.

    NG: Repair or replace damaged parts.

  8. CHECK SYMPTOM 

    Check again. Refer to "CRUISE TEST - PART 1 ".

    OK or NG 

    OK: INSPECTION END 

    NG: GO TO 9.

  9. PERFORM TCM INSPECTION 
    1. Perform TCM input/output signals inspection. Refer to "TCM INPUT/OUTPUT SIGNAL REFERENCE VALUES ".
    2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.

    OK or NG 

    OK: INSPECTION END 

    NG: Repair or replace damaged parts.

  10. DETECT MALFUNCTIONING ITEM 
    • Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to "SYMPTOM CHART " (Symptom No.24).

    OK or NG 

    OK: GO TO  8.

    NG: Repair or replace damaged parts.

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