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Function Confirmation Procedure

WARNING: This page is about a different car, the 2003 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.
  1. SET IN SELF-DIAGNOSTIC MODE 
    1. Turn ignition switch ON.
    2. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned ON.), press OFF switch for at least 5 seconds.
    CAUTION:
    • If battery voltage drops below 12V during diagnosis STEP-3, actuator speed becomes slower and as a result, the system may generate an error even when operation is usual. To avoid this, start engine before performing this diagnosis.
    • Former STEP-1 (LEDs and display screen are checked) does not exist in this self-diagnosis function.

    GO TO 2.

  2. STEP 2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT 

    Does code No. 20 appear on the display? 

    YES: GO TO 3.

    NO: GO TO  13.

    Fig 1: Sensor Display - All Sensors Are In Good Order
    G01188635Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK TO ADVANCE SELF-DIAGNOSIS STEP-3 

    Turn temperature dial (driver side) clockwise.

    Advance to self-diagnosis STEP-3? 

    YES: GO TO 4.

    NO: Malfunctioning temperature dial.

    Replace A/C and AV switch.

  4. CHECK TO RETURN SELF-DIAGNOSIS STEP-2 

    Turn temperature dial (driver side) counterclockwise.

    Return to self-diagnosis STEP-2? 

    YES: GO TO 5.

    NO:

    1. Malfunctioning temperature dial.
    2. Replace A/C and AV switch.

  5. STEP-3: MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED 

    Turn temperature dial (driver side) clockwise.

    Does code No. 30 appear on the display? 

    YES: GO TO 6.

    NO: GO TO  14.

    Fig 2: Door Display - All Doors In Good Order
    G01188636Courtesy of NISSAN MOTOR CO., U.S.A.
  6. STEP-4: OPERATION OF EACH ACTUATOR IS CHECKED 
    1. Turn temperature dial (driver side) clockwise.
    2. Press DEF switch. Code No. of each actuator test is indicated on the display.

      GO TO 7.

      Fig 3: Actuator Checking Display Example
      G01188637Courtesy of NISSAN MOTOR CO., U.S.A.
  7. CHECK ACTUATORS 

    Refer to the following chart and confirm discharge air flow, air temperature, blower motor voltage and compressor operation. See Fig 4.

    Fig 4: Discharge Air Flow Mode Description Chart
    G01188638Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 5: Actuator Door Position Specification Chart
    G01188639Courtesy of NISSAN MOTOR CO., U.S.A.

    Checks must be made visually, by listening to any noise, or by touching air outlets with your hand, etc. for improper operation.

    * 1: FOOT position during automatic control. Refer to AUXILIARY MECHANISM: FOOT POSITION SETTING TRIMMER .

    OK or NG 

    OK: GO TO 8.

    NG

  8. STEP-5: TEMPERATURE OF EACH SENSOR IS CHECKED 
    1. Turn temperature dial (driver side) clockwise.
    2. Code No. 51 appears on the display.

    GO TO 9.

  9. CHECK AMBIENT SENSOR 

    Press (DEF) switch one time. Temperature detected by ambient sensor is indicated on the display.

    NOTE: If temperature shown on display greatly differs from actual temperature, check sensor circuit first, then inspect sensor.
    Fig 6: Checking Ambient Sensor Display
    G01188640Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 10.

    NG: GO to Ambient Sensor Circuit. Refer to AMBIENT SENSOR CIRCUIT .

  10. CHECK IN-VEHICLE SENSOR 

    Press (DEF) switch a second time. Temperature detected by in vehicle sensor is indicated on the display.

    NOTE: If temperature shown on display greatly differs from actual temperature, check sensor circuit first, then inspect sensor.
    Fig 7: Checking In-Vehicle Sensor Display
    G01188641Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 11.

    NG: GO to In-vehicle Sensor Circuit. Refer to IN-VEHICLE SENSOR CIRCUIT .

  11. CHECK INTAKE SENSOR 

    Press (DEF) switch a third time. Temperature detected by intake sensor is indicated on the display.

    NOTE: If temperature shown on display greatly differs from actual temperature, check sensor circuit first, then inspect sensor.
    Fig 8: Checking Intake Sensor Display
    G01188642Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 12.

    NG: GO to Intake Sensor Circuit. Refer to INTAKE SENSOR CIRCUIT .

  12. CHECK CAN COMMUNICATION ERROR 
    1. Press (REC) switch.
    2. CAN communication error between unified meter and A/C amp. and DISPLAY UNIT or DISPLAY CONTROL UNIT is detected.
      Fig 9: Checking CAN Communication Error Display
      G01188643Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK

    1. Turn ignition switch OFF or AUTO switch ON.
    2. INSPECTION END

    NG: GO to CAN communication. Refer to SYSTEM DESCRIPTION under CAN COMMUNICATION .

    • Unified meter and A/C amp. - DISPLAY UNIT
    • Unified meter and A/C amp. - DISPLAY CONTROL UNIT
  13. CHECK MALFUNCTIONING SENSOR 

    Refer to MALFUNCTIONING SENSOR CODES  for malfunctioning code No.

    (If two or more sensors malfunction, corresponding code Nos. blink respectively twice.)

    When performing indoors, aim a light (more than 60W) at sunload sensor, otherwise Code No. 25 will indicate despite that sunload sensor is functioning properly.

    MALFUNCTIONING SENSOR CODES

    Code No. Manufacturing Sensor (Including Circuits) See Diagnostic Procedure For
    21/-21 Ambient Sensor AMBIENT SENSOR 
    22/-22 In-vehicle Sensor IN-VEHICLE SENSOR 
    24/-24 Intake Sensor INTAKE SENSOR 
    25/-25 Sunload Sensor (1) SUNLOAD SENSOR 
    26/-26 Air Mix Door Motor PBR (Driver Side) LAN CIRCUIT 
    27/-27 Air Mix Door Motor PBR (Passenger Side)
    (1) Perform self-diagnosis STEP-2 under sunshine.
    Fig 10: Display With Malfunctioning Sensor
    G01188645Courtesy of NISSAN MOTOR CO., U.S.A.

    INSPECTION END

  14. CHECK MALFUNCTIONING DOOR MOTOR POSITION SWITCH 

    Mode or (and) intake door motor PBR (s) is (are) malfunctioning.

    (If two or more mode or intake doors are out of order, corresponding code numbers blink respectively twice.)

    MALFUNCTIONING DOOR MOTOR POSITION CODES

    Code No. (1)(2) Mode Or Intake Door Position See
    31 VENT Mode Door Motor (3)
    32 B/L 1
    33 B/L 2
    34 FOOT (4)
    35 D/F
    36 DEF
    37 FRE Intake Door Motor (5)
    38 20% FRE
    39 REC
    NOTE: If two or more mode or intake doors are out of order, corresponding code numbers blick respectively twice.
    (1) If mode door motor harness connector is disconnected, the following display pattern will appear: 31>32>33>34>35>36> Return to 31.
    (2) If intake door motor harness connector is disconnected, the following display pattern will appear: 37>38>39> Return to 37.
    (3) Refer to MODE DOOR MOTOR CIRCUIT .
    (4) FOOT position during automatic control. Refer to AUXILIARY MECHANISM: FOOT POSITION SETTING TRIMMER 
    (5) Refer to Refer to INTAKE DOOR MOTOR CIRCUIT .
    Fig 11: Display Code - When One Door Is Out Of Order
    G01188647Courtesy of NISSAN MOTOR CO., U.S.A.

    INSPECTION END

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