Nissan X-Trail 32. Manual - part 1400

SYSTEM SETTING

HAC-75

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONING]

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• 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 (FRE)

INFOID:0000000010939727

DESCRIPTION

• If the ignition switch is turned to the OFF position while the INTAKE switch is set to OFF (fresh air intake),

“Perform the memory” or “Do not perform the memory” of INTAKE switch OFF (fresh air intake) condition can
be selected. 

• If “Perform the memory” was set, the INTAKE switch will be OFF (fresh air intake) 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 “FRE 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.
• 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.

Setting of Target Evaporator Temperature Upper Limit Value

INFOID:0000000010939728

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.

Work support items

Display

Setting

FRE MEMORY SET

WITHOUT (initial status)

Perform the memory of manual FRE

WITH

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

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.

HAC-76

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONING]

SYSTEM SETTING

NOTE:
• 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.

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.

Setting

Target evapora-

tor temperature 

upper limit value

Evaporator freezing protection control

Refrigerant discharge amount control

DOOR MOTOR STARTING POSITION RESET

HAC-77

< BASIC INSPECTION >

[AUTOMATIC AIR CONDITIONING]

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DOOR MOTOR STARTING POSITION RESET

Description

INFOID:0000000010939729

• Step motors are used for the mode door motor air mix door motor (driver side/passenger side), 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 auto amp. and the actual door position.
Therefore, A/C auto 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 auto amp. to the air mix door motor (driver side/passenger side),

mode door motor, and intake door motor, which then perform zero position reset.

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

tion switch is next turned ON.

- The battery terminal is disconnected and then reconnected.
- The travel distance reaches 3,000 km (1864 miles). [Performed every 3,000 km (1864 miles).]
• If A/C auto amp., air mix door motor (driver side, passenger side), mode door motor, or intake door motor is

removed, it is necessary to perform motor zero position reset using CONSULT.

Work Procedure

INFOID:0000000010939730

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-78

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

U1000 CAN COMM CIRCUIT

DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

DTC Description

INFOID:0000000010939732

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-78, "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:0000000010939733

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 auto amp. is not transmitting or receiving CAN communication sig-
nal for 2 seconds or more.