HAC-1
VENTILATION, HEATER & AIR CONDITIONER
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SECTION HAC
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B
HAC
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CONTENTS
HEATER & AIR CONDITIONING CONTROL SYSTEM
AUTOMATIC AIR CONDITIONER
PRECAUTION ................ ...............................
5
PRECAUTIONS .............................................. .....5
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
5
Precaution for Work ..................................................5
Working with HFC-134a (R-134a) .............................5
Precaution for Service Equipment .............................6
PREPARATION ............................................8
PREPARATION .............................................. .....8
Special Service Tool ........................................... ......8
Commercial Service Tool ..........................................8
SYSTEM DESCRIPTION ..............................9
COMPONENT PARTS ................................... .....9
Component Part Location ................................... ......9
Component Description ...........................................10
SYSTEM .............................................................13
System Diagram .................................................. ....13
System Description .................................................13
Air Flow Control .......................................................14
Air Inlet Control .......................................................15
Air Outlet Control .....................................................16
Compressor Control ................................................16
Door Control ............................................................17
Temperature Control ...............................................20
Fail-safe ..................................................................20
OPERATION .......................................................21
Switch Name and Function ................................. ....21
DIAGNOSIS SYSTEM (A/C AUTO AMP.) .........24
CONSULT Function (HVAC) ............................... ....24
ECU DIAGNOSIS INFORMATION ..............28
A/C AUTO AMP. ...............................................28
Reference Value .................................................. ....28
DTC Inspection Priority Chart ...............................30
DTC Index ...............................................................31
ECM, IPDM E/R, BCM .......................................33
List of ECU Reference .............................................33
WIRING DIAGRAM ......................................34
AIR CONDITIONER CONTROL ........................34
Wiring Diagram .................................................... ....34
BASIC INSPECTION ...................................46
DIAGNOSIS AND REPAIR WORKFLOW ........46
Work Flow ............................................................ ....46
OPERATION INSPECTION ..............................48
Work Procedure .......................................................48
SYSTEM SETTING ...........................................50
Temperature Setting Trimmer ............................. ....50
Foot Position Setting Trimmer .................................50
Inlet Port Memory Function (FRE) ...........................50
Inlet Port Memory Function (REC) ..........................51
Target Evaporator Temp Upper Limit ......................51
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT (A/C AUTO AMP.) .................
52
Description ........................................................... ....52
Work Procedure .......................................................52
CONFIGURATION (HVAC) ...............................53
Description ...............................................................53
Work Procedure .......................................................53
Configuration List .....................................................54
DTC/CIRCUIT DIAGNOSIS .........................55
U1000 CAN COMM CIRCUIT ...........................55
Description ........................................................... ....55
DTC Logic ................................................................55
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
SRC-16
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (AIR BAG)
Air bag warning lamp flashing pattern (User Mode)
Trouble Diagnosis with CONSULTINFOID:0000000009460725
1. Connect CONSULT.
2. DTC is displayed on SELF-DIAG RESULTS.
NOTE:
If a malfunction is not detected on SELF-DIAG RESU LTS [CURRENT], but a malfunction is detected during
SRS Operation Check, the following cases may exist:
• SELF-DIAG [PAST] memory might not be erased. Refer to SRC-17, "SRS Final Check"
.
• SRS system malfunctions intermittently. Refer to SRC-43, "Inspection Procedure"
.
Warning lamp SRS condition Reference item
• No malfunction is detected.
• No further action is necessary. —
The system is malfunctioning and
needs to be repaired. Refer to
SRC-16, "Trouble Diagno-
sis with CONSULT" or SRC-17,
"Trouble Diagnosis without CON-
SULT".
Zero point reset is incomplete Refer to
SRC-42, "ZERO POINT
RESET : Special Repair Require-
ment".
• Air bag is deployed.
• Seat belt pre-tensioner is deployed. Refer to
SR-5, "For Frontal Collision"
or SR-7, "For Side and Rollover Col-
lision".
• Air bag diagnosis sensor unit is mal- functioning.
• Air bag power supply circuit is mal- functioning.
• SRS air bag warning lamp circuit is
malfunctioning. Refer to
SRC-109, "AIR BAG Warn-
ing Lamp Does Not Turn Off".
• Air bag diagnosis sensor unit is mal- functioning.
• Air bag warning lamp circuit is mal- functioning. Refer to
SRC-108, "AIR BAG Warn-
ing Lamp Does Not Turn On".
SHIA0011E
SHIA0012E
SHIA0013E
SHIA0014E
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
