Nissan X-Trail 32. Manual - part 1399

DIAGNOSIS AND REPAIR WORK FLOW

HAC-71

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

YES

>> GO TO 9.

NO

>> Check according to 

GI-44, "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-44, "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-72

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONING]

OPERATION INSPECTION

OPERATION INSPECTION

Work Procedure

INFOID:0000000010939724

DESCRIPTION

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

OPERATION INSPECTION

1.

CHECK MEMORY FUNCTION

1.

Press AUTO switch to activate air conditioning.

2.

Set temperature to 30.0

°

C by operating temperature control dial (driver side).

3.

Press ON·OFF switch.

4.

Turn ignition switch OFF.

5.

Turn ignition switch ON.

6.

Press AUTO switch.

7.

Check that the set temperature (30.0

°

C) is maintained.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 10.

2.

CHECK FAN SPEED

1.

Start engine.

2.

Operate fan switch and check that fan speed changes.

3.

Check operation for all fan speeds.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 10.

3.

CHECK AIR OUTLET

1.

Operate fan switch to set the fan speed to maximum speed.

2.

Operate MODE VENT/FOOT/DEF switch and MAX DEF switch.

3.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 10.

4.

CHECK AIR INLET

1.

Press INTAKE switch to set the air inlet to recirculation. The INTAKE switch indicator turns ON.

2.

Listen to intake sound and confirm air inlets change.

3.

Press INTAKE switch again to set the air inlet to fresh air intake. The INTAKE switch indicator turns OFF.

4.

Listen to intake sound and confirm air inlets change.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 10.

5.

CHECK COMPRESSOR

1.

Press A/C switch. The A/C switch indicator turns ON.

2.

Check visually and by sound that the compressor operates.

3.

Press A/C switch again. The A/C switch indicator turns OFF.

4.

Check that compressor stops.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 10.

Check condition

: Engine running at normal operating temperature.

OPERATION INSPECTION

HAC-73

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONING]

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6.

CHECK DISCHARGE AIR TEMPERATURE

1.

Operate temperature control dial (driver side).

2.

Check that discharge air temperature (driver side) changes.

3.

Operate temperature control dial (passenger side). DUAL switch indicator turns ON.

4.

Check that discharge air temperature (passenger side) changes.

5.

Press DUAL switch. DUAL switch indicator turns OFF.

6.

Check that air temperature setting (LH/RH) is unified to the driver side temperature setting.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 10.

7.

CHECK WITH TEMPERATURE SETTING LOWERED

1.

Operate compressor.

2.

Operate temperature control dial (driver side) to lower the set temperature to 16.0

°

C.

3.

Check that cool air blows from the air outlets.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 10.

8.

CHECK TEMPERATURE INCREASE

1.

Warm up engine to the normal operating temperature.

2.

Operate temperature control dial (driver side) to raise the set temperature to 30.0

°

C.

3.

Check that warm air blows from the air outlets.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> GO TO 10.

9.

CHECK AUTO MODE

1.

Press AUTO switch and check that AUTO indicator turns ON.

2.

Operate temperature control dial (driver side) to check that fan speed or air outlet changes (the air outlet
or fan speed varies depending on the ambient temperature, in-vehicle temperature, set temperature, and
etc.).

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 10.

10.

CHECK SELF-DIAGNOSIS WITH ON BOARD DIAGNOSIS SYSTEM

1.

Perform self-diagnosis with on board diagnosis.

2.

Check that any whether malfunction result is detected.

Is any malfunction result detected?

YES

>> Refer to 

HAC-48, "Diagnosis Description"

 and perform the appropriate diagnosis.

NO

>> GO TO 11.

11.

CHECK SELF-DIAGNOSIS WITH CONSULT

1.

Perform self-diagnosis with CONSULT.

2.

Check that any DTC is detected.

Is any DTC detected?

YES

>> Refer to 

HAC-56, "DTC Index"

, and perform the appropriate diagnosis.

NO

>> GO TO 12.

12.

CHECK FAIL-SAFE ACTIVATION

Check that symptom is applied to the fail-safe activation. Refer to 

HAC-55, "Fail-safe"

.

>> Refer to 

HAC-118, "Symptom Table"

, and perform the appropriate diagnosis.

HAC-74

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONING]

SYSTEM SETTING

SYSTEM SETTING

Temperature Setting Trimmer

INFOID:0000000010939725

DESCRIPTION

If the temperature felt by the customer is different from the air flow temperature controlled by the temperature
setting, the A/C auto amp. control temperature can be adjusted to compensate for the temperature setting.

HOW TO SET

With CONSULT

Perform “TEMP SET CORRECT” of HVAC work support item. 

NOTE:
• When 

−

3.0

°

C is corrected on the temperature setting set as 25.0

°

C the temperature controlled by A/C auto

amp. is 25.0

°

C 

−

 

−

3.0

°

C = 22.0

°

C and the temperature becomes lower than the temperature setting. 

• A/C auto amp. stores the setting at the time 1 minute after the ignition switch turns OFF.
• When the battery cable is disconnected from the negative terminal or when the battery voltage is 10 V or

less, the setting for the difference between the set temperature and control temperature is set to the value
stored 1 minute after most recent ignition switch OFF status.

Inlet Port Memory Function (REC)

INFOID:0000000010939726

DESCRIPTION

• If the ignition switch is turned to the OFF position while the INTAKE switch is set to ON (recirculation), “Per-

form the memory” or “Do not perform the memory” of INTAKE switch ON (recirculation) condition can be
selected. 

• If “Perform the memory” was set, the INTAKE switch will be ON (recirculation) when turning the ignition

switch to the ON position again. 

• If “Do not perform the memory” was set, the air inlets will be controlled automatically when turning the igni-

tion switch to the ON position again. 

HOW TO SET

With CONSULT

Perform the “REC MEMORY SET” of HVAC work support item. 

NOTE:
• A/C auto amp. stores the setting at the time 1 minute after the ignition switch turns OFF.

Work support items

Display (

°

C)

TEMP SET CORRECT

3.0

2.5

2.0

1.5

1.0

0.5

0 (initial status)

−

0.5

−

1.0

−

1.5

−

2.0

−

2.5

−

3.0

Work support items

Display

Setting

REC MEMORY SET

WITHOUT (initial status)

Perform the memory of manual REC

WITH

Do not perform the memory of manual REC (auto control)