U1000 NISSAN TEANA 2014 Owner's Guide

HAC-1
VENTILATION, HEATER & AIR CONDITIONER
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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
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HAC-24
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONER]
DIAGNOSIS SYSTEM
(A/C AUTO AMP.)
DIAGNOSIS SYSTEM (A/C AUTO AMP.)
CONSULT Function (HVAC)INFOID:0000000009463103
CAUTION:
After disconnecting the CONSULT vehicle interface (VI) from the data link connector, the ignition must
be cycled OFF → ON (for at least 5 seconds) → OFF. If this step is not performed, the BCM may not go
to ”sleep mode”, potentially causing a di scharged battery and no-start condition.
CONSULT can display each diagnosis item us ing the diagnosis test modes as shown.
CONSULT application items
SELF-DIAGNOSTIC RESULT
Refer to HAC-31, "DTC Index".
Display Item List
Diagnosis mode Description
Self-Diagnostic Result Displays the diagnosis results judged by A/C auto amp.
Data Monitor Displays A/C auto amp. input/output data in real time.
Work support Changes the setting for each system function.
Active Test The signals used to activate each device are forcibly supplied from A/C auto amp.
ECU Identification Displays the A/C auto amp. number.
Configuration • The vehicle specification can be read and saved.
• The vehicle specification can be written when replacing A/C auto amp.
DTC Items
(CONSULT screen terms) Diagnostic item is detected when... 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) When detecting error during the initial
diagnosis of CAN controller of A/C auto
amp. A/C auto amp.
B257B AMB TEMP SEN (SHORT) Detected temperature at ambient sen-
sor 55 °C (131 °F) or more • Ambient sensor
• A/C auto amp.
• Harness and connector (Ambient sensor circuit is open,
or there is a short in the circuit)
B257C AMB TEMP SEN (OPEN)
Detected temperature at ambient sen-
sor −30 °C ( −22 °F) or less
B2578 IN-CAR SENSOR (OUT OF RANGE
[LOW]) Detected temperature at in-vehicle sen-
sor 55 °C (131 °F) or more • In-vehicle sensor
• A/C auto amp.
• Harness and connector (In-vehicle sensor circuit is open,
or there is a short in the circuit)
B2579
IN-CAR SENSOR (OUT OF RANGE
[HI]) Detected temperature at in-vehicle sen-
sor −30 °C ( −22 °F) or less
B2581 EVAP TEMP SEN (SHORT) Detected temperature at intake sensor
55 °C (131 °F) or more • Intake sensor
• A/C auto amp.
• Harness and connector
(Intake sensor circuit is open, or
there is a short in the circuit)
B2582 EVAP TEMP SEN (OPEN)
Detected temperature at intake sensor
− 30 °C ( −22 °F) or less
B2630
*SUNLOAD SEN (SHORT) Detected calorie at sunload sensor
1395 w/m2 (1200 kcal/m2·h) • Sunload sensor
• A/C auto amp.
• Harness and connector (Sunload sensor circuit is open,
or there is a short in the circuit)
B2631
*SUNLOAD SEN (OPEN) Detected calorie at sunload sensor 0 w/
m2 (0 kcal/m2·h)
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A/C AUTO AMP.HAC-31
< ECU DIAGNOSIS INFORMATION > [AUTOMATIC AIR CONDITIONER]
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DTC IndexINFOID:0000000009463106
Priority Detected items (DTC) 1 • U1000: CAN COMM CIRCUIT
• U1010: CONTROL UNIT (CAN)
2 • B257B: AMB TEMP SEN (SHORT)
• B257C: AMB TEMP SEN (OPEN)
• B2578: IN CAR SENSOR (OUT OF RANGE[LOW])
• B2579: IN CAR SENSOR (OUT OF RANGE[HI])
• B2581: EVAP TEMP SEN (SHORT)
• B2582: EVAP TEMP SEN (OPEN)
• B2630: SUNLOAD SEN (SHORT)
• B2631: SUNLOAD SEN (OPEN)
• B2632: DR AIRMIX ACTR (SHORT)
• B2633: DR AIRMIX ACTR (OPEN)
• B2634: PASS AIRMIX ACTR (SHORT)
• B2635: PASS AIRMIX ACTR (OPEN)
• B2636: DR VENT DOOR FAIL
• B2637: DR B/L DOOR FAIL
• B2638: DR D/F1 DOOR FAIL
• B2639: DR DEF DOOR FAIL
• B263D: FRE DOOR FAIL
• B263E: 20P FRE DOOR FAIL
• B263F: REC DOOR FAIL
• B2654: D/F2 DOOR FAIL
• B2655: B/L2 DOOR FAIL
• B27B0: A/C AUTO AMP.
DTC Items
(CONSULT screen terms) Reference
U1000 CAN COMM CIRCUIT HAC-55, "DTC Logic"
U1010 CONTROL UNIT (CAN)HAC-56, "DTC Logic"
B257B AMB TEMP SEN (SHORT) HAC-60, "DTC Logic"
B257C AMB TEMP SEN (OPEN) HAC-60, "DTC Logic"
B2578 IN CAR SENSOR (OUT OF RANGE [LOW])HAC-57, "DTC Logic"
B2579 IN CAR SENSOR (OUT OF RANGE [HI])HAC-57, "DTC Logic"
B2581 EVAP TEMP SEN (SHORT)HAC-63, "DTC Logic"
B2582 EVAP TEMP SEN (OPEN)HAC-63, "DTC Logic"
B2630*SUNLOAD SEN (SHORT)HAC-66, "DTC Logic"
B2631*SUNLOAD SEN (OPEN)HAC-66, "DTC Logic"
B2632 DR AIRMIX ACTR (SHORT) HAC-69, "DTC Logic"
B2633 DR AIRMIX ACTR (OPEN)HAC-69, "DTC Logic"
B2634 PASS AIRMIX ACTR (SHORT)HAC-71, "DTC Logic"
B2635 PASS AIRMIX ACTR (OPEN)HAC-71, "DTC Logic"
B2636 DR VENT DOOR FAILHAC-73, "DTC Logic"
B2637 DR B/L DOOR FAILHAC-73, "DTC Logic"
B2638 DR D/F1 DOOR FAILHAC-73, "DTC Logic"
B2639 DR DEF DOOR FAILHAC-73, "DTC Logic"
B263D FRE DOOR FAIL HAC-75, "DTC Logic"
B263E 20P FRE DOOR FAILHAC-75, "DTC Logic"
B263F REC DOOR FAILHAC-75, "DTC Logic"
B2654 D/F2 DOOR FAILHAC-73, "DTC Logic"
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U1000 CAN COMM CIRCUITHAC-55
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
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DTC/CIRCUIT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000009463121
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 vehicl es, 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-32, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart"
.
DTC LogicINFOID:0000000009463122
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 HAC-55, "Diagnosis Procedure".
NO >> Refer to GI-43, "Intermittent Incident"
.
Diagnosis ProcedureINFOID:0000000009463123
1.CHECK CAN COMMUNICATION SYSTEM
Check CAN communication system. Refer to LAN-18, "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
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B2578, B2579 IN-VEHICLE SENSORHAC-57
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
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B2578, B2579 IN-VEHICLE SENSOR
DTC LogicINFOID:0000000009463127
DTC DETECTION LOGIC
NOTE:
• If DTC is displayed along with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to HAC-
55, "DTC Logic".
• If DTC is displayed along with DTC U1010, first per form the trouble diagnosis for DTC U1010. Refer to HAC-
56, "DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
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 HAC-57, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000009463128
Regarding Wiring Diagram information, refer to HAC-34, "Wiring Diagram".
1.CHECK IN-VEHICLE SENSOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect in-vehicle sensor connector.
3. Turn ignition switch ON.
4. Check voltage between in-vehicle sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK IN-VEHICLE SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between front in-vehicle sensor harness connector and ground.
DTC Items
(CONSULT screen terms) DTC detection condition Possible cause
B2578 IN-VEHICLE SENSOR The in-vehicle sensor recognition temperature
is too high. • In-vehicle sensor
• A/C auto amp.
• Harness or connectors (The sensor circuit is open or short-
ed.)
B2579
The in-vehicle sensor recognition temperature
is too low.
+
−Vol tag e
(Approx.)
In-vehicle sensor
Connector Terminal M34 1 Ground 5 V
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HAC-60
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
B257B, B257C AMBIENT SENSOR
B257B, B257C AMBIENT SENSOR
DTC LogicINFOID:0000000009463130
DTC DETECTION LOGIC
NOTE:
• If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to HAC-
55, "DTC Logic".
• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to HAC-
56, "DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
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 HAC-60, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000009463131
Regarding Wiring Diagram information, refer to HAC-34, "Wiring Diagram".
1.CHECK AMBIENT SENSOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect ambient sensor connector.
3. Turn ignition switch ON.
4. Check voltage between ambient sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK AMBIENT SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between ambient sensor harness connector and ground.
DTCItems
(CONSULT screen terms) DTC detection condition Possible cause
B257B AMBIENT SENSOR The ambient sensor recognition temperature is
too high. • Ambient sensor
• A/C auto amp.
• Harness or connectors (The sensor circuit is open or short-
ed.)
B257C
The ambient sensor recognition temperature is
too low.
+
−Voltage
(Approx.)
Ambient sensor
Connector Terminal E211 1 Ground 5 V
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B2581, B2582 INTAKE SENSORHAC-63
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
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B2581, B2582 INTAKE SENSOR
DTC LogicINFOID:0000000009463133
DTC DETECTION LOGIC
NOTE:
• If DTC is displayed along with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to HAC-
55, "DTC Logic".
• If DTC is displayed along with DTC U1010, first per form the trouble diagnosis for DTC U1010. Refer to HAC-
56, "DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
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 HAC-63, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000009463134
Regarding Wiring Diagram information, refer to HAC-34, "Wiring Diagram".
1.CHECK INTAKE SENSOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect intake sensor connector.
3. Turn ignition switch ON.
4. Check voltage between intake sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK INTAKE SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between intake sensor harness connector and ground.
DTC Items
(CONSULT screen terms) DTC detection condition Possible cause
B2581 INTAKE SENSOR The intake sensor recognition temperature is
too high. • Intake sensor
• A/C auto amp.
• Harness or connectors (The sensor circuit is open or short-
ed.)
B2582
The intake sensor recognition temperature is
too low.
+
−Vol tag e
(Approx.)
Intake sensor
Connector Terminal M69 1 Ground 5 V
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HAC-66
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
B2630, B2631 SUNLOAD SENSOR
B2630, B2631 SUNLOAD SENSOR
DTC LogicINFOID:0000000009463136
DTC DETECTION LOGIC
NOTE:
• If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to HAC-
55, "DTC Logic" or HAC-56, "DTC Logic".
• Sunload sensor may register a malfunction when indoors, at dusk, or at other times when light is insufficient.
When performing the diagnosis indoors, light the sunload sensor with a lamp (60W or more).
DTC CONFIRMATION PROCEDURE
1.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT
1. Using CONSULT, perform “SELF- DIAGNOSIS RESULTS” of HVAC.
2. Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
• If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to HAC-
55, "DTC Logic" or HAC-56, "DTC Logic".
• Sunload sensor may register a malfunction when indoors, at dusk, or at other times when light is insufficient.
When performing the diagnosis indoors, light the sunload sensor with a lamp (60W or more).
Is DTC No.
“B2630” or “B2631” displayed?
YES >> Perform trouble diagnosis for the sunload sensor. Refer to HAC-66, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000009463137
Regarding Wiring Diagram information, refer to HAC-34, "Wiring Diagram".
1.CHECK SUNLOAD SENSOR POWER SUPPLY
1. Disconnect sunload sensor connector.
2. Turn ignition switch ON.
3. Check voltage between sunload sensor harness connector M56 terminal 1 and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK CONTINUITY BETWEEN SUNL OAD SENSOR AND A/C AUTO AMP.
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
DTC Items
(CONSULT screen terms) Diagnostic item is detected when... Possible cause
B2630 SUNLOAD SEN (SHORT) Detected calorie at sunload sensor 1395 w/m
2
(1200 kcal/m2·h) or more • Sunload sensor
• A/C auto amp.
• Harness and connector
(Sunload sensor circuit is open, or
there is a short in the circuit)
B2631 SUNLOAD SEN (OPEN)
Detected calorie at sunload sensor 0 w/m
2
(0 kcal/m2·h)
+
−Voltage
(Approx.)
Sunload sensor
Connector Terminal M56 1 Ground 5 V
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

B27B0 A/C AUTO AMP.HAC-77
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
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B27B0 A/C AUTO AMP.
DTC LogicINFOID:0000000009463147
DTC DETECTION LOGIC
NOTE:
• If DTC is displayed along with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to HAC-
55, "DTC Logic".
• If DTC is displayed along with DTC U1010, first per form the trouble diagnosis for DTC U1010. Refer to HAC-
56, "DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
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 HAC-77, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000009463148
1.PERFORM SELF DIAGNOSTIC
With CONSULT
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.
3. Touch “ERASE”.
4. Turn ignition switch OFF.
5. Turn ignition switch ON.
6. Perform “DTC CONFIRMATION PROCEDURE”. Refer to HAC-77, "DTC Logic"
.
Is DTC detected again?
YES >> Replace A/C auto amp. Refer to HAC-102, "Removal and Installation".
NO >> Inspection End.
DTC Items
(CONSULT screen terms) DTC detection condition Possible cause
B27B0 A/C AUTO AMP. A/C auto amp. EEPROM
system is mal-
functioning. A/C auto amp.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

HAC-88
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
A/C SWITCH ASSEMBLY SIGNAL CIRCUIT
A/C SWITCH ASSEMBL
Y SIGNAL CIRCUIT
Diagnosis ProcedureINFOID:0000000009463161
Regarding Wiring Diagram information, refer to HAC-34, "Wiring Diagram".
1.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT
1. Using CONSULT, perform “SELF- DIAGNOSIS RESULTS” of HVAC.
2. Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to HAC-
55, "DTC Logic" or HAC-56, "DTC Logic".
Is any DTC No. displayed?
YES >> Perform diagnosis for the applicable DTC. Refer to HAC-31, "DTC Index".
NO >> GO TO 2.
2.CHECK TX (A/C SWITCH ASSEMBLY → A/C AUTO AMP.) CIRCUIT CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect the A/C switch assembly and the A/C auto amp. connectors.
3. Check continuity between A/C switch assembly harness connector M79 terminal 10 and A/C auto amp.
harness connector M152 terminal 24.
4. Check continuity between A/C switch assembly harness connector M79 terminal 10 and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK RX (A/C AUTO AMP. → A/C SWITCH ASSEMBLY) CIRCUIT CONTINUITY
1. Check continuity between A/C switch assembly harness connector M79 terminal 9 and A/C auto amp. harness connector M152 terminal 4.
2. Check continuity between A/C switch assembly harness connector M79 terminal 9 and ground.
Is the inspection result normal?
YES >> Perform trouble diagnosis for the A/C switch assembly. Refer to HAC-83, "A/C SWITCH ASSEM-
BLY : Diagnosis Procedure".
NO >> Repair harness or connector.
A/C switch assembly A/C auto amp. Continuity
Connector Terminal Connector Terminal
M79 10 M152 24 Yes
A/C switch assembly —Continuity
Connector Terminal
M79 10 Ground No
A/C switch assembly A/C auto amp. Continuity
Connector Terminal Connector Terminal
M79 9 M152 4 Yes
A/C switch assembly —Continuity
Connector Terminal
M79 9 Ground No
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM