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Inspection Flow

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - FRONT BLOWER 
    1. Press the top of the fan switch. Fan should operate.
    2. Press the top of the fan switch and continue checking fan speed and fan symbol until all speeds are checked.

    Can the symptom be duplicated? 

    Yes: GO TO  3.

    No: GO TO  2.

  2. PERFORM COMPLETE OPERATIONAL CHECK 

    Perform a complete operational check and check for any symptoms. Refer to "OPERATIONAL CHECK ".

    Can a symptom be duplicated? 

    YES: Refer to "SYMPTOM TABLE ".

    NO: System OK.

  3. CHECK FOR SERVICE BULLETINS 

    Check for any service bulletins.

    : GO TO  4.

  4. PERFORM FRONT AIR CONTROL SELF-DIAGNOSIS 

    Perform front air control self-diagnosis. Refer to "FRONT AIR CONTROL SELF - DIAGNOSIS ".

    OK or NG 

    OK: GO TO  5.

    NG: Perform power and ground circuit for front air control. Refer to "POWER SUPPLY AND GROUND CIRCUIT FOR FRONT AIR CONTROL AND UNIFIED METER AND A/C AMP .".

  5. PERFORM SELF-DIAGNOSIS STEP - 2 

    Perform self-diagnosis STEP - 2. Refer to "FUNCTION CONFIRMATION PROCEDURE ".

    OK or NG 

    OK: GO TO  6.

    NG: Perform the appropriate malfunctioning sensor circuit.

  6. PERFORM SELF-DIAGNOSIS STEP - 4 

    Perform self-diagnosis STEP - 4. Refer to "FUNCTION CONFIRMATION PROCEDURE ".

    BLOWER MOTOR VOLTAGE SPECIFICATION

    Code No. 41 42 43 44 45 46
    Blower motor voltage 5V 11.75V 8.5V 8.5V 8.5V 11.75V

    Does blower motor speed change according to each code No.? 

    Yes: GO TO  7.

    NO: Check blower motor circuit. Refer to "DIAGNOSTIC PROCEDURE FOR BLOWER MOTOR ".

  7. CHECK ENGINE COOLANT TEMPERATURE 

    Check engine coolant temperature.

    Is engine coolant temperature below 56°C (133°F)? 

    Yes: GO TO  8.

    NO: Blower motor operation is normal.

  8. CHECK BLOWER MOTOR SPEED 

    Check blower motor speed.

    Is blower motor operating under starting blower speed control? 

    Yes: GO TO  9.

    NO: Check blower motor circuit. Refer to "DIAGNOSTIC PROCEDURE FOR BLOWER MOTOR ".

  9. CHECK AMBIENT SENSOR CIRCUIT (CAUSE CANNOT BE CONFIRMED BY SELF-DIAGNOSIS) 

    Perform diagnostic procedure for the ambient sensor circuit. Refer to "AMBIENT SENSOR CIRCUIT ".

    OK or NG 

    OK: GO TO  10.

    NG: Repair as necessary.

  10. CHECK IN-VEHICLE SENSOR CIRCUIT 

    Perform diagnostic procedure for the in-vehicle sensor circuit. Refer to "IN-VEHICLE SENSOR CIRCUIT ".

    OK or NG 

    OK: GO TO  11.

    NG: Repair as necessary.

  11. CHECK SUNLOAD SENSOR CIRCUIT 

    Perform diagnostic procedure for the sunload sensor circuit. Refer to "SUNLOAD SENSOR CIRCUIT ".

    OK or NG 

    OK: GO TO  12.

    NG: Repair as necessary.

  12. CHECK INTAKE SENSOR CIRCUIT 

    Perform diagnostic procedure for the intake sensor circuit. Refer to "INTAKE SENSOR CIRCUIT ".

    OK or NG 

    OK: If the symptom still exists, perform a complete operational check and check for other symptoms. Refer to "OPERATIONAL CHECK ". and check for other symptoms. Refer to "SYMPTOM TABLE ". If no other symptom exists replace unified meter and A/C amp. Refer to "UNIFIED METER AND A/C AMP .".

    NG: Repair as necessary.

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