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
, and perform the appropriate diagnosis.
NO
>> Refer to
, 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]
C
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A
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HAC
N
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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.
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