Function Confirmation Procedure

1. Set the fan control dial to OFF position.
2. Turn ignition switch ON.
3. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned ON.), press A/C 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.
   • GO TO 2.

Check intake and A/C switch LEDs illumination  .

• OK: GO TO 3.
• NG: refer to "SELF-DIAGNOSIS ".

Fig 1: Checking Intake & A/C Switch LEDs Illumination

Courtesy of NISSAN MOTOR CO., U.S.A.

1. Turn fan control dial to AUTO position.
   CAUTION: When switched to STEP-2, LED of REC position blinks for approximately 25 seconds.
2. Advance to self-diagnosis STEP-2?

Check A/C switch LED illumination  .

• OK: GO TO 4.
• NG: Replace A/C controller. (Fan control dial malfunctioning.)

Fig 2: Checking A/C Switch LED Illumination

Courtesy of NISSAN MOTOR CO., U.S.A.

Turn fan control dial to OFF position.

Return to self-diagnosis STEP-1? 

• YES: GO TO 5.
• NO: Replace A/C controller. (Fan control dial malfunctioning.)

1. Turn fan control dial to AUTO position.
2. Turn mode control dial to AUTO position.
   CAUTION: When switched to STEP-2, LED of REC position blinks for approximately 25 seconds.
3. Check A/C switch LED is illuminate.

OK or NG 

• OK: GO TO 6.
• NG: GO TO  9.

Fig 3: Checking A/C Switch LED Is Illuminate

Courtesy of NISSAN MOTOR CO., U.S.A.

1. Turn fan control dial to 1st-12th speed.
   CAUTION: When switched to STEP-3, LED of REC position blinks for approximately 50 seconds.
2. Check A/C switch LED is illuminate.

OK or NG 

• OK: GO TO 7.
• NG: GO TO  10.

Fig 4: Checking A/C Switch LED Is Illuminate When Performing Self Diagnosis

Courtesy of NISSAN MOTOR CO., U.S.A.

1. Turn fan control dial to 13th-25th speed.
2. Change operation status of air conditioner by changing mode control dial position.
   • GO TO 8.

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

Fig 5: Discharge Air Flow Reference Chart

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 6: Mode Control Dial Position Chart

Courtesy 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: Step No. 41 to 46 are for differentiation and will not be displayed.

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

OK or NG 

• OK :
  1. Turn ignition switch OFF or intake switch ON.
  2. INSPECTION END
• NG :
  • Air outlet does not change.

    Go to Mode Door Motor Circuit. Refer to "MODE DOOR MOTOR CIRCUIT ".

  • Intake door does not change.

    Go to Intake Door Motor Circuit. Refer to "INTAKE DOOR MOTOR CIRCUIT ".

  • Blower motor operation is malfunctioning.

    Go to Blower Motor Circuit. Refer to "BLOWER MOTOR CIRCUIT ".

  • Magnet clutch does not engage.

    Go to Magnet Clutch Circuit. Refer to "MAGNET CLUTCH CIRCUIT ".

  • Discharge air temperature does not change.

    Go to Air Mix Door Motor Circuit. Refer to "AIR MIX DOOR MOTOR CIRCUIT ".

Refer to the following chart.

*1: Perform self-diagnosis STEP-2 under sunshine.

When performing indoors, aim a light (more than 60W) at sunload sensor, otherwise LED of A/C switch will not indicate despite that sunload sensor is functioning properly.

Fig 7: LED Sunlight Sensor Test

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 8: Malfunctioning Sensor Reference Chart

Courtesy of NISSAN MOTOR CO., U.S.A.

*2: "DIAGNOSTIC PROCEDURE FOR AMBIENT SENSOR ".

*3: "DIAGNOSTIC PROCEDURE FOR IN-VEHICLE SENSOR ".

*4: "DIAGNOSTIC PROCEDURE FOR SUNLOAD SENSOR ".

*5: "DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR ".

*6: "DIAGNOSTIC PROCEDURE FOR LAN CIRCUIT ".

• INSPECTION END

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

*1: "DIAGNOSTIC PROCEDURE FOR MODE DOOR MOTOR ".

*2: "DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR ".

Fig 9: LEDs For A Malfunctioning Actuator Illuminates

Courtesy of NISSAN MOTOR CO., U.S.A.

• INSPECTION END