Function Confirmation Procedure

WARNING: This page is about a different car, the 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

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 normal. To avoid this, start engine before performing this diagnosis.

>> GO TO 2.
STEP-1: LEDS AND DISPLAY ARE CHECKED
Check LED illumination and display screen.

Fig 1: Identifying Display Screen
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Locating LED Illumination
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK >> GO TO 3.

NG >> Malfunctioning OFF switch, LED or auto amp. Refer to "MULTIPLEX COMMUNICATION CIRCUIT ".
CHECK TO ADVANCE SELF-DIAGNOSIS STEP-2
1. Turn the temperature dial clockwise.
2. Advance to self-diagnosis STEP-2?
YES or NO

YES >> GO TO 4.

NO >> Malfunctioning temperature dial.

>> Replace multifunction switch.
CHECK TO RETURN SELF-DIAGNOSIS STEP-1
1. Turn the temperature dial counterclockwise.
2. Return to self-diagnosis STEP-1?
YES or NO

YES >> GO TO 5.

NO >> Malfunctioning temperature dial.

>> Replace multifunction switch.
STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
1. Turn the temperature dial clockwise.
2. Does code No. 20 appear on the display?
YES or NO

YES >> GO TO 6.

NO >> GO TO 14.
STEP-3: MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED
1. Turn the temperature dial clockwise.
2. Does code No. 30 appear on the display?
YES or NO

YES >> GO TO 7.

NO >> GO TO 15.
STEP-4: OPERATION OF EACH ACTUATOR IS CHECKED
1. Turn the temperature dial clockwise.
2. Press DEF switch, code No. of each actuator test is indicated on the display.
>> GO TO 8.
CHECK ACTUATORS
Refer to the following chart and confirm discharge air flow, air temperature, blower motor voltage and compressor operation.

Fig 6: Actuators Checking Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 7: Actuators Checking Table
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.

OK or TO

OK >> GO TO 9.

NG >>
- Air outlet does not change.
  Go to Mode Door Motor "DIAGNOSTIC PROCEDURE FOR MODE DOOR MOTOR ".
- Intake door does not change
  Go to Intake Door Motor "DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR "
- Blower motor operation is malfunctioning.
  Go to Blower Motor "DIAGNOSTIC PROCEDURE FOR BLOWER MOTOR "
- Magnet clutch does not engage.
  Go to Magnet Clutch "DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH "
- Discharge air temperature does not change.
  Go to Air Mix Door Motor "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR ".
STEP-5: TEMPERATURE OF EACH SENSOR IS CHECKED
1. Turn the temperature dial clockwise.
2. Code No. 51 appears on the display.
>> GO TO 10.
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 8: Checking Ambient Sensor
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK >> GO TO 11.

NG >> GO TO "AMBIENT SENSOR CIRCUIT ".
CHECK IN-VEHICLE SENSOR
Press (DEF) switch the second time, temperature detected by invehicle 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 9: Checking In-Vehicle Sensor
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK >> GO TO 12.

NG >> Go to "IN-VEHICLE SENSOR CIRCUIT ".
CHECK INTAKE SENSOR
Press (DEF) switch the 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 10: Checking Intake Sensor
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK >> GO TO 13.

NG >> Go to "INTAKE SENSOR CIRCUIT ".
CHECK MULTIPLEX COMMUNICATION ERROR
1. Press intake switch.
2. Multiplex communication error between AV control unit (AV and NAVI control unit) and auto amp. is detected.
(If plural errors occur, the display of each error will blink two times for 0.5 second intervals.)

Fig 11: Checking Multiplex Communication Error
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK >>
1. Turn ignition switch OFF or AUTO switch ON.
2. END
NG >> Go to "MULTIPLEX COMMUNICATION CIRCUIT ".
CHECK MALFUNCTIONING SENSOR
Refer to the following chart for malfunctioning code No. (If two or more sensors malfunction, corresponding code Nos. blink respectively two times.) *1: Conduct self-diagnosis STEP-2 under sunshine. When conducting indoors, aim a light (more than 60W) at sunload sensor, otherwise Code No. 25 will indicate despite that sunload sensor is functioning properly.

Fig 12: Sensors Malfunctioning Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 13: Checking Malfunctioning Sensor
Courtesy of NISSAN MOTOR CO., U.S.A.

>> INSPECTION END
CHECK MALFUNCTIONING DOOR MOTOR POSITION SWITCH
Mode or (and) intake door motor position switch(es) is (are) malfunctioning.

Fig 14: Malfunctioning Table Of Door Motor Position Switch
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 15: Checking Malfunctioning Door Motor Position Switch
Courtesy of NISSAN MOTOR CO., U.S.A.

>> INSPECTION END