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Function Confirmation Procedure

WARNING: This page is about a different car, the 2008 Infiniti FX45 and 2008 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.
  1. SET IN SELF-DIAGNOSIS MODE 
    1. Turn ignition switch ON.
    2. Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned ON.), press OFF switch for at least 5 seconds.
      NOTE:
      • If battery voltage drops below 12 V during diagnosis STEP-3, door motor speed becomes slower and as a result, the system may generate an error even when operation is normal. 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: Identifying Self-Diagnosis Function Display
    G04887554Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK TO ADVANCE SELF-DIAGNOSIS STEP-3 

    Press temperature control (UP) switch (driver side).

    Advance to self-diagnosis STEP-3? 

    Yes: GO TO 4.

    No: Replace A/C and AV switch. (Temperature control switch is malfunctioning.)

  4. CHECK TO RETURN SELF-DIAGNOSIS STEP-2 

    Press temperature control (DOWN) switch (driver side).

    Return to self-diagnosis STEP-2? 

    Yes: GO TO 5.

    No: Malfunctioning A/C and AV switch or unified meter and A/C amp. Refer to "SELF-DIAGNOSIS ".

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

    Press temperature control (UP) switch (driver side).

    Does code No. 30 appear on the display? 

    Yes: GO TO 6.

    No: GO TO  14.

    Fig 2: Identifying Self-Diagnosis Function Display
    G04887555Courtesy of NISSAN MOTOR CO., U.S.A.
  6. STEP-4: OPERATION OF EACH DOOR MOTOR IS CHECKED 
    1. Press temperature control (UP) switch (driver side).
    2. Press (DEF) switch. Code No. of each door motor test is indicated on the display.

      >> GO TO 7.

      Fig 3: Identifying Self-Diagnosis Function Display
      G04887556Courtesy of NISSAN MOTOR CO., U.S.A.
  7. CHECK ACTUATORS 

    Refer to the following chart and check discharge air flow, air temperature, blower motor duty ratio and compressor operation.

    Fig 4: Identifying Discharge Air Flow Chart
    G05221708Courtesy of NISSAN MOTOR CO., U.S.A.
    DISCHARGE AIR FLOW CHART

    Code No. 41 42 43 44 45 46
    Mode door position VENT B/L 1 B/L 2 FOOT(1)1 D/F DEF
    Intake door position REC REC 20% FRE FRE FRE FRE
    Air mix door position FULL COLD FULL COLD FULL HOT FULL HOT FULL HOT FULL HOT
    Blower motor duty ratio 37% 91% 65% 65% 65% 91%
    Compressor ON ON OFF OFF ON ON
    Electronic control valve (ECV) duty ratio 100% 100% 0% 0% 50% 100%
    Checks must be made visually, by listening the sound, or by touching air outlets with 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. Press temperature control (UP) switch (driver side).
    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 the temperature indicated on the display greatly differs from the actual temperature, check sensor circuit first, and then check sensor.

    OK or NG 

    OK: GO TO 10.

    NG: Go to Ambient Sensor Circuit. Refer to "AMBIENT SENSOR CIRCUIT ".

    Fig 5: Identifying Ambient Sensor Temperature Display
    G04887557Courtesy of NISSAN MOTOR CO., U.S.A.
  10. CHECK IN-VEHICLE SENSOR 

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

    NOTE: If the temperature indicated on the display greatly differs from the actual temperature, check sensor circuit first, and then check sensor.
    Fig 6: Identifying In-Vehicle Sensor Temperature Display
    G04887558Courtesy 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 for the third time. Temperature detected by intake sensor is indicated on the display.

    NOTE: If the temperature indicated on the display greatly differs from the actual temperature, check sensor circuit first, and then check sensor.
    Fig 7: Identifying Intake Sensor Temperature Display
    G04887559Courtesy 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 intake switch.
    2. CAN communication error between the unified meter and A/C amp. and the display control unit can be detected as self-diagnosis results. (If plural errors occur, the display of each error will blink twice for 0.5 second intervals.)
      3. Fig 8: Identifying CAN Communication Error Display
      G05221712Courtesy 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 "CAN COMMUNICATION INSPECTION USING CONSULT-III (SELF-DIAGNOSIS) ".

    • Unified meter and A/C amp. - Display control unit
  13. CHECK MALFUNCTIONING SENSOR AND DOOR MOTOR 

    Refer to the following chart for malfunctioning code No.

    (If two or more sensors and door motors malfunction, corresponding code Nos. indicates 1 second each.)

    MALFUNCTION REFERENCE CHART

    Code No. Malfunctioning sensor and door motor (Including circuits) Reference
    21/-21 Ambient sensor AMBIENT SENSOR CIRCUIT 
    22/-22 In-vehicle sensor IN-VEHICLE SENSOR CIRCUIT 
    24/-24 Intake sensor INTAKE SENSOR CIRCUIT 
    25/-25 Sunload sensor(1) SUNLOAD SENSOR CIRCUIT 
    26/-26 Air mix door motor PBR (Driver side) AIR MIX DOOR MOTOR PBR CIRCUIT 
    27/-27 Air mix door motor PBR (Passenger side)

    (1) Perform self-diagnosis STEP-2 under sunshine.

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

    Fig 9: Identifying Door Motor Sensor Malfunctioning Code No Display
    G04919046Courtesy of NISSAN MOTOR CO., U.S.A.

    >> INSPECTION END

  14. CHECK MALFUNCTIONING DOOR MOTOR POSITION SWITCH 

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

    MALFUNCTIONING DOOR MOTOR POSITION SWITCH

    Code No.(1)1 (2) Mode or intake door position Reference
    31 VENT Mode door motor MODE DOOR MOTOR CIRCUIT 
    32 B/L 1
    33 B/L 2
    34 FOOT(3)
    35 D/F
    36 DEF
    37 FRE Intake door motor INTAKE DOOR MOTOR CIRCUIT 
    38 20% FRE
    39 REC
    (If two or more mode or intake door motors malfunction, corresponding code Nos. indicates 1 second each.)
    (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) FOOT position during automatic control. Refer to "AUXILIARY MECHANISM: FOOT POSITION SETTING TRIMMER ".
    Fig 10: Identifying Door Motor Position Switch Malfunctioning Display
    G04919047Courtesy of NISSAN MOTOR CO., U.S.A.

    >> INSPECTION END

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