Nissan Sentra B18 (2020-2025) Service Manual: Operation Inspection

Nissan Sentra B18 (2020-2025) Service Manual / Ventilation, Heater & Air Conditioner / Heater & Air Conditioning Control System :: Manual Air Conditioner / Basic Inspection / Operation Inspection

Work Procedure

Work Procedure

DESCRIPTION

The purpose of the operational check is to check that the individual system operates normally.

Check condition	: Engine running at normal operating temperature.
Check condition	: Blower control dial in OFF position.
Check condition	: REC off (LED extinguished).
Check condition	: VENT selected (LED illuminated).
Check condition	: DEF off (LED extinguished).

OPERATION INSPECTION

CHECK BLOWER
1. 1. Rotate the blower control dial clockwise one detent. Blower should operate on low speed.
  2. Rotate the blower control dial one detent at a time, and continue checking blower speed until all speeds are checked.
  3. Leave blower on maximum speed.
Is the test result normal?
YES >>
GO TO 2.
NO >>
Refer to Diagnosis Procedure.
CHECK A/C SWITCH LED
1. 1. Press A/C switch.
  2. A/C switch indicator should turn ON.
Is the test result normal?
YES >>
GO TO 3.
NO >>
Refer to Diagnosis Procedure.
CHECK A/C SWITCH
1. Confirm that the A/C compressor clutch engages (sound or visual inspection).
Is the test result normal?
YES >>
GO TO 4.
NO >>
Refer to Diagnosis Procedure.
CHECK A/C SWITCH ASSEMBLY MODE LEDS
1. 1. Press D/F (), FOOT (), B/L , and VENT , MAX A/C, and DEF ().
  2. Each button indicator should illuminate.
Is the test result normal?
YES >>
GO TO 5.
NO >>
Refer to Diagnosis Procedure.
CHECK DISCHARGE AIR
1. 1. Press D/F (), FOOT (), B/L , and VENT and DEF ().
  2. Confirm that discharge air comes out according to the air distribution table. Refer to Door Control.
Is the test result normal?
YES >>
GO TO 6.
NO >>
Refer to Symptom Table.
CHECK REC LED
1. 1. Press DEF () and make sure LED is off.
  2. Make sure VENT () or B/L () is selected.
  3. Press REC () switch one time. REC indicator should illuminate.
  4. Press REC () switch one more time. REC indicator should go off.
Is the test result normal?
YES >>
GO TO 7.
NO >>
Refer to Diagnosis Procedure.
CHECK INTAKE DOOR OPERATION
1. 1. Press REC () switch one time. REC indicator should illuminate.
  2. Listen to the sound of the air coming out of the vent.
  3. Press REC () switch one more time. REC indicator should go off.
  4. There should be an audible change to the sound of the air flowing out of the vent.
Is the test result normal?
YES >>
GO TO 8.
NO >>
Refer to Diagnosis Procedure.
CHECK TEMPERATURE DECREASE
1. 1. Press A/C switch.
  2. Rotate temperature control dial counterclockwise until maximum cold.
  3. Check for cold air at selected discharge air outlets.
Is the test result normal?
YES >>
GO TO 9.
NO >>
Refer to Component Function Check.
CHECK TEMPERATURE INCREASE
1. 1. Rotate temperature control dial clockwise until maximum hot.
  2. Check for hot air at appropriate discharge air outlets.
Is the test result normal?
YES >>
Inspection End.
NO >>
Refer to Component Function Check.

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