Nissan X-Trail 32. Manual - part 1428

OPERATION INSPECTION

HAC-187

< BASIC INSPECTION >

[MANUAL AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

YES

>> GO TO 7.

NO

>> GO TO 8.

7.

CHECK TEMPERATURE INCREASE

1.

Warm up engine to the normal operating temperature.

2.

Operate temperature control dial to raise the set to full hot.

3.

Check that warm air blows from the air outlets.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 8.

8.

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-171, "DTC Index"

, and perform the appropriate diagnosis.

NO

>> Refer to 

HAC-217, "Symptom Table"

, and perform the appropriate diagnosis.

HAC-188

< BASIC INSPECTION >

[MANUAL AIR CONDITIONING]

SYSTEM SETTING

SYSTEM SETTING

Setting of Target Evaporator Temperature Upper Limit Value

INFOID:0000000010939833

DESCRIPTION

Setting of upper limit value of target evaporator temperature can be changed. Control characteristic of com-
pressor control (refrigerant discharge amount control) changes according to change of the setting, and then
operation ratio of compressor and refrigerant discharge amount are changed. According to change of the set-
ting, control characteristic focusing on the fuel consumption can be adjusted to control characteristic focusing
on the cooling capacity.

HOW TO SET

With CONSULT

Perform “TARGET EVAPORATOR TEMP UPPER LIMIT SETTING” in “WORK SUPPORT” mode of “HVAC”
using CONSULT.

NOTE:
• A/C 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.

Work support items

Display

Setting

TARGET EVAPORATOR TEMP UPPER 
LIMIT SETTING

Initial setting

Initial setting

High

Setting 1

Middle

Setting 2

Low

Setting 3

Setting

Target evapora-

tor temperature 

upper limit value

Evaporator freezing protection control

Refrigerant discharge amount control

Initial set-

ting

12

°

C (54

°

F)

Initial setting

Initial setting

Setting 1

7

°

C (45

°

F)

Operation ratio of compressor increases from ini-

tial setting.

Refrigerant discharge amount increases from 

initial setting.

Setting 2

5

°

C (41

°

F)

Operation ratio of compressor increases from ini-

tial setting 1.

Refrigerant discharge amount increases from 

initial setting 1.

Setting 3

3

°

C (37

°

F)

Operation ratio of compressor increases from 

setting 2.

Refrigerant discharge amount increases from 

setting 2.

DOOR MOTOR STARTING POSITION RESET

HAC-189

< BASIC INSPECTION >

[MANUAL AIR CONDITIONING]

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DOOR MOTOR STARTING POSITION RESET

Description

INFOID:0000000010939834

• Step motors are used for the mode door motor air mix door motor, and intake door motor.
• Because the step motors do not have position detection mechanisms, there may be a deviation between the

door position recognized by A/C amp. and the actual door position.
Therefore, A/C amp. performs motor zero position reset for aligning its recognized door position with the
actual door position.

• The reset signal is transmitted from A/C amp. to the air mix door motor, mode door motor, and intake door

motor, which then perform zero position reset.

• After any of the following conditions is met, A/C amp. performs motor zero position reset when the ignition

switch is next turned ON.

- The ignition switch is turned from ON to OFF a total of 360 times.
- The ignition switch turns OFF while the mode door motor, air mix door motor, or intake door motor is operat-

ing.

• If A/C amp., air mix door motor, mode door motor, or intake door motor is removed, it is necessary to perform

motor zero position reset using CONSULT.

Work Procedure

INFOID:0000000010939835

1.

PERFORM DOOR MOTOR STARTING POSITION RESET

With CONSULT

1.

Turn ignition switch ON.

2.

Select “Door Motor Starting Position Reset” in “WORK SUPPORT” mode of “HVAC” using CONSULT.

3.

Touch “Start” and wait 10 seconds.

4.

Make sure the “COMPLETED” is displayed on CONSULT screen.

>> INSPECTION END

HAC-190

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

U1000 CAN COMM CIRCUIT

DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

DTC Description

INFOID:0000000010939837

DESCRIPTION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-board mul-
tiplex communication line with high data communication speed and excellent error detection ability. A modern
vehicle is equipped with many ECMs, and each control unit shares information and links with other control
units during operation (not independent). In CAN communication, 2 control units are connected with 2 commu-
nication lines (CAN-L line and CAN-H line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only. 
Refer to 

LAN-41, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart"

 for details of the

communication signal. 

DTC DETECTION LOGIC

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

Turn ignition switch ON and wait for 2 seconds or more. 

2.

Select “Self Diagnostic Result” mode of “HVAC” using CONSULT. 

3.

Check DTC.

Is DTC detected?

YES

>> Refer to 

HAC-190, "Diagnosis Procedure"

. 

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010939838

1.

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to 

LAN-17, "Trouble Diagnosis Flow Chart"

.

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

U1000

CAN COMM CIRCUIT
(CAN COMM CIRCUIT)

When A/C amp. is not transmitting or receiving CAN communication signal for 
2 seconds or more.