Nissan Sentra. Instruction — part 552
HAC-56
< BASIC INSPECTION >
[AUTOMATIC AIR CONDITIONER]
SYSTEM SETTING
Inlet Port Memory Function (REC)
INFOID:0000000009757644
Description
• If the ignition switch is turned to the OFF position while the REC (
) switch is set to ON (recirculation),
“Perform the memory” or “Do not perform the memory” of the REC (
) switch ON (recirculation) condi-
tion can be selected.
• If “Perform the memory” was set, the REC (
) 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
Using CONSULT, perform “REC MEMORY SET” in “WORK SUPPORT” of HVAC.
NOTE:
When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10V or less, the setting of the
REC switch memory function may be cancelled.
Target Evaporator Temp Upper Limit
INFOID:0000000009757645
DESCRIPTION
Set the target evaporator temperature upper limit.
HOW TO SET
With CONSULT
Perform the “TARGET EVAPORATOR TEMP UPPER LIMIT SETTING” of HVAC work support item.
Work support items
Display
Setting
REC MEMORY SET
WITHOUT (initial status)
Perform the memory of instruction REC
WITH
Do not perform the memory of instruction REC (auto
control)
Work support items
Display
TARGET EVAPORATOR TEMP UPPER LIMIT
SETTING
Initial Setting
Low
Middle
High
DOOR MOTOR STARTING POSITION RESET
HAC-57
< BASIC INSPECTION >
[AUTOMATIC AIR CONDITIONER]
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DOOR MOTOR STARTING POSITION RESET
Description
INFOID:0000000009757646
• Reset signal is transmitted from A/C auto amp. to air mix door motor and mode door motor. Starting position
reset can be performed.
NOTE:
During reset, DEF switch indicator blinks.
• When air mix door motor or mode door motor is removed and installed, always perform door motor starting
position reset.
Work Procedure
INFOID:0000000009757647
1.
PERFORM DOOR MOTOR STARTING POSITION RESET
With CONSULT
1. Turn ignition switch ON.
2. Select “Door Motor Starting Position Reset” in “ACTIVE TEST” mode of “HVAC” using CONSULT.
3. Touch “Start” and wait a few seconds.
4. Make sure the “COMPLETED” is displayed on CONSULT screen.
>> Inspection End.
HAC-58
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
U1000 CAN COMM CIRCUIT
DTC/CIRCUIT DIAGNOSIS
U1000 CAN COMM CIRCUIT
Description
INFOID:0000000009757648
CAN (Controller Area Network) is a serial communication system for real time application. It is an on-vehicle
multiplex communication system with high data communication speed and excellent error detection ability.
Many electronic control units are equipped onto vehicles, and each control unit shares information and links
with other control units during operation (not independent). In CAN communication, control units are con-
nected with two communication lines (CAN-H line, CAN-L 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-30, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart"
.
DTC Logic
INFOID:0000000009757649
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM SELF-DIAGNOSIS
With CONSULT
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Using CONSULT, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
3. Check if any DTC No. is displayed in the self-diagnosis results.
Is DTC detected?
YES
>> Refer to
NO
>> Refer to
GI-39, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000009757650
1.
CHECK CAN COMMUNICATION SYSTEM
Check CAN communication system. Refer to
LAN-16, "Trouble Diagnosis Flow Chart"
>> Inspection End.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
U1000
CAN COMM CIRCUIT
When A/C auto amp. is not transmitting
or receiving CAN communication signal
for 2 or more seconds.
CAN communication system
U1010 CONTROL UNIT (CAN)
HAC-59
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
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U1010 CONTROL UNIT (CAN)
Description
INFOID:0000000009757651
Initial diagnosis of A/C auto amp.
DTC Logic
INFOID:0000000009757652
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM SELF-DIAGNOSIS
With CONSULT
1. Turn ignition switch ON.
2. Using CONSULT, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
3. Check if any DTC No. is displayed in the self-diagnosis results.
Is DTC detected?
YES
>> Refer to
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000009757653
1.
REPLACE A/C AUTO AMP.
Replace A/C auto amp. Refer to
HAC-105, "Removal and Installation"
.
>> Inspection End.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
U1010
CONTROL UNIT (CAN)
When detecting error during the initial diag-
nosis of CAN controller of A/C auto amp.
A/C auto amp.
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