Nissan Sentra Service Manual: Basic inspection

Nissan Sentra Service Manual / Ventilation, heater & air conditioner / Heater & air conditioning system / Basic inspection

Diagnosis and repair workflow

Workflow

OVERALL SEQUENCE

DETAILED FLOW

DETAILED FLOW

1.INTERVIEW CUSTOMER

Interview the customer to obtain as much information as possible about the conditions and environment under which the malfunction occurred.

>> GO TO 2.

2.SYMPTOM CHECK

Verify symptoms.

>> GO TO 3.

3.CHECK FOR DTCS

With CONSULT

Turn ignition switch ON.
Select вЂњSelf Diagnostic ResultвЂќ mode of вЂњHVACвЂќ using CONSULT.
Check DTC.

Is any DTC detected? YES >> GO TO 4.

NO >> GO TO 5.

4.PERFORM DTC DIAGNOSTIC PROCEDURE

Perform the diagnostic procedure for the detected DTC. Refer to HAC-37, "DTC Inspection Priority Chart".

>> GO TO 7.

5.OPERATION CHECK

Perform the operation check. Refer to HAC-53, "Work Procedure" (automatic A/C) or HAC-157, "Work Procedure" (manual A/C).

>> GO TO 6.

6.SYMPTOM DIAGNOSIS

Check the symptom diagnosis table. Refer to HA-17, "Symptom Table".

>> GO TO 8.

7.VERIFY REPAIR

With CONSULT

Turn ignition switch ON.
Select вЂњSelf Diagnostic ResultвЂќ mode of вЂњHVACвЂќ using CONSULT.
Check DTC.

Is any DTC detected? YES >> GO TO 4.

NO >> GO TO 8.

8.PERFORM FINAL OPERATION CHECK

Perform the operation check. Refer to HAC-53, "Work Procedure" (automatic A/C) or HAC-157, "Work Procedure" (manual A/C).

Does it operate normally? YES >> Inspection End.

NO >> GO TO 2.

System description

Refrigeration system Component part location High-pressure service port High-pressure pipe Expansion valve Low-pressure service port Low-pressure flexible hose Compressor Refrige ...

Other materials:

P0720 Output speed sensor
DTC Logic DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble diagnosis content) DTC detection condition Possible causes P0720 OUTPUT SPEED SENSOR (Output Speed Sensor Circuit) The output speed sensor value is less than 150 rpm continuously for 5 seconds ...

U1000 CAN Comm circuit
DTC Logic DTC DETECTION LOGIC DTC Display Item Malfunction detected condition Possible causes U1000 CAN COMM CIRCUIT When CAN communication signal is not continuously received for 2 seconds or more CAN communication system malfunction Diagnosis Procedure ...

Symptom diagnosis
Squeak and rattle trouble diagnoses Work Flow CUSTOMER INTERVIEW Interview the customer if possible, to determine the conditions that exist when the noise occurs. Use the Diagnostic Worksheet during the interview to document the facts and conditions when the noise occurs and any custom ...