Nissan Cube. Manual - part 542

HAC-6

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONING]

DIAGNOSIS AND REPAIR WORK FLOW

1.

GET INFORMATION FOR SYMPTOM

1.

Get detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurs).

2.

Check operation condition of the function that is malfunctioning.

>> GO TO 2.

2.

CHECK DTC

1.

Check DTC.

2.

Perform the following procedure if DTC is detected.

-

Record DTC and freeze frame data (Print them out using CONSULT.)

-

Erase DTC.

-

Study the relationship between the cause detected by DTC and the symptom described by the customer.

3.

Check related service bulletins for information.

Are any symptoms described and any DTC detected?

Symptom is described, DTC is detected>>GO TO 3.
Symptom is described, DTC is not detected>>GO TO 4.
Symptom is not described, DTC is detected>>GO TO 7.

3.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer.
Also study the normal operation and fail-safe related to the symptom.
Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 7.

4.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer.
Also study the normal operation and fail-safe related to the symptom.
Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 5.

5.

SELF-DIAGNOSIS WITH ON BOARD DIAGNOSIS SYSTEM

Perform the self-diagnosis with on board diagnosis. Check that whether malfunction result is detected or not.

Is malfunction result detected?

YES

>> GO TO 6.

NO

>> GO TO 8.

6.

TROUBLE DIAGNOSIS BY MALFUNCTION

Perform the trouble diagnosis for the detected malfunction result. Specify the malfunctioning part.

>> GO TO 9.

7.

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC CONFIRMATION PROCEDURE for the detected DTC, and then check that DTC is detected
again. At this time, always connect CONSULT to the vehicle, and check self diagnostic results in real time.
If two or more DTCs are detected, refer to DTC INSPECTION PRIORITY CHART, and determine trouble diag-
nosis order.
NOTE:
• Freeze frame data is useful if the DTC is not detected.
• Perform Component Function Check if DTC CONFIRMATION PROCEDURE is not included on Service

Manual. This simplified check procedure is an effective alternative though DTC cannot be detected during
this check.
If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC CONFIR-
MATION PROCEDURE.

Is DTC detected?

DIAGNOSIS AND REPAIR WORK FLOW

HAC-7

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONING]

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YES

>> GO TO 9.

NO

>> Check according to 

GI-40, "Intermittent Incident"

.

8.

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM DIAGNOSIS

Detect malfunctioning system according to SYMPTOM DIAGNOSIS based on the confirmed symptom in step
4, and determine the trouble diagnosis order based on possible causes and symptom.
Is the symptom described?

YES

>> GO TO 9.

NO

>> Monitor input data from related sensors or check voltage of related module terminals using CON-

SULT.

9.

DETECT MALFUNCTIONING PART BY DIAGNOSIS PROCEDURE

Inspect according to Diagnosis Procedure of the system.
Is malfunctioning part detected?

YES

>> GO TO 10.

NO

>> Check according to 

GI-40, "Intermittent Incident"

.

10.

REPAIR OR REPLACE THE MALFUNCTIONING PART

1.

Repair or replace the malfunctioning part.

2.

Reconnect parts or connectors disconnected during Diagnosis Procedure again after repair and replace-
ment.

3.

Check DTC. If DTC is detected, erase it.

>> GO TO 11.

11.

FINAL CHECK

When DTC is detected in step 2, perform DTC CONFIRMATION PROCEDURE again, and then check that the
malfunction is repaired securely.
When symptom is described by the customer, refer to confirmed symptom in step 3 or 4, and check that the
symptom is not detected.
Is DTC detected and does symptom remain?

YES-1 >> DTC is detected: GO TO 9.
YES-2 >> Symptom remains: GO TO 4.
NO

>> Before returning the vehicle to the customer, always erase DTC.

HAC-8

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONING]

INSPECTION

INSPECTION

Description & Inspection

INFOID:0000000009950966

DESCRIPTION

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

1.

CHECK MEMORY FUNCTION

1.

Start the engine.

2.

Set the temperature to 32

°

C (90

°

F) by operating the temperature control switch. 

3.

Press OFF switch.

4.

Turn ignition switch OFF.

5.

Turn ignition switch ON.

6.

Press AUTO switch.

7.

Check that the set temperature is maintained.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Memory function malfunction. Refer to 

HAC-120, "Inspection Procedure"

.

2.

CHECK BLOWER MOTOR

1.

Start the engine.

2.

Operate the fan control switch. Check that the fan speed changes. Check the operation for all fan speeds. 

3.

Leave blower on maximum speed.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Blower motor system malfunction. Refer to 

HAC-54, "Diagnosis Procedure"

. 

3.

CHECK DISCHARGE AIR

1.

Operate MODE switch and DEF switch to each position. 

2.

Check that the air outlets change according to each indicated air outlet by placing a hand in front of the
outlets. Refer to 

VTL-2, "System Description"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Mode door system malfunction. Refer to 

HAC-47, "Diagnosis Procedure"

. 

4.

CHECK INTAKE AIR

1.

Press REC switch to set the air outlet to recirculation. 

2.

The REC indicator turns ON. 

3.

Listen to intake sound and confirm air inlets change. 

4.

Press FRE switch again to set the air outlet to fresh air intake. 

5.

The FRE indicator turns ON. 

6.

Listen to intake sound and confirm air inlets change. 

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Intake door system malfunction. Refer to 

HAC-50, "Diagnosis Procedure"

. 

5.

CHECK A/C SWITCH

1.

Press the A/C switch.

2.

Check that the indicator of the A/C switch turns ON. Check visually and by sound that the compressor
operates. 

3.

Press the A/C switch again. 

4.

Check that the indicator of the A/C switch turns OFF. Check that the compressor stops. 

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Magnet clutch system malfunction. Refer to 

HAC-59, "Diagnosis Procedure"

. 

Check condition

: Engine running at normal operating temperature.

INSPECTION

HAC-9

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONING]

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6.

CHECK DISCHARGE AIR TEMPERATURE

Operate the temperature control switch. Check that the discharge air temperature changes. 
Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Air mix door system malfunction. Refer to 

HAC-44, "Diagnosis Procedure"

.

7.

CHECK TEMPERATURE DECREASE

1.

Operate the compressor. 

2.

Operate the temperature control switch to lower temperature setting at 18

°

C (60

°

F). 

3.

Check that the cool air blows from the outlets. 

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Insufficient cooling. Refer to 

HAC-115, "Diagnosis Procedure"

. 

8.

CHECK TEMPERATURE INCREASE

1.

Turn temperature control switch to raise temperature setting at 32

°

C (90

°

F) after warming up the engine.

2.

Check that warm air blows from outlets.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Insufficient heating. Refer to 

HAC-117, "Diagnosis Procedure"

. 

9.

CHECK AUTO MODE

1.

Press AUTO switch to confirm that “AUTO” is indicated on the display. 

2.

Operate the temperature control switch to check that the fan speed or air outlet changes (the air flow tem-
perature or fan speed varies depending on the ambient temperature, in-vehicle temperature, and set tem-
perature). 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Refer to 

HAC-114, "Diagnosis Chart By Symptom"

 and perform the appropriate diagnosis.