display INFINITI QX56 2011 Factory Service Manual

SYSTEM SETTINGHAC-71
< BASIC INSPECTION > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
Movement Change FunctionINFOID:0000000006275902
DESCRIPTION
Condition for interlocking movement of auto intake switch and A/C switch can be changed. In addition opera-
tion of the auto intake switch, which activates the aut omatic intake control (exhaust gas / outside odor detect-
ing mechanism), can be set to become available when the A/C switch is ON.
HOW TO SET
With CONSULT-III
Perform the “CLEAN SW SET” of HVAC work support item.
NOTE:
When the battery cable is disconnect ed from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of WO RK SUPPORT may be cancelled.
Work support items Display Setting
CLEAN SW SET Mode1 Initial setting
Mode2 Setting 1
Mode3 Setting 2
Mode4 Setting 3
Initial setting
When the auto intake switch is ON, the A/C switch is al
so turned ON in synchronization with the auto intake
switch.
Control of the auto intake switch is function al even when the A/C switch is turned OFF.
Setting 1 When the auto intake switch is ON, the A/C switch is
not turned ON in synchronization with the auto intake
switch.
Control of the auto intake switch is function al even when the A/C switch is turned OFF.
Setting 2 When the auto intake switch is ON, the A/C switch is al
so turned ON in synchronization with the auto intake
switch.
When the A/C switch is turned OFF, the auto intake switch is turned OFF in synchronization with the A/C
switch.
Setting 3 Auto intake switch can be turned ON only when A/C switch is ON.
When the A/C switch is turned OFF, the auto intake switch is turned OFF in synchronization with the A/C
switch.
Revision: 2010 May2011 QX56

HAC-74
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B2578, B2579 FRONT IN-VEHICLE SENSOR
B2578, B2579 FRONT IN-VEHICLE SENSOR
DTC LogicINFOID:0000000006275909
DTC DETECTION LOGIC
NOTE:
 If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
HAC-
72, "DTC Logic".
 If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to HAC-
73, "DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” m ode of “HVAC” using CONSULT-III.
3. Check DTC.
Is DTC detected?
YES >> Refer to HAC-106, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275910
1.CHECK FRONT IN-VEHICLE SENSOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect front in-vehicle sensor connector.
3. Turn ignition switch ON.
4. Check voltage between front in-vehicle sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK FRONT IN-VEHCLE SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between front in-vehicle sensor harness connector and A/C auto amp. harness connec-
tor.
Is the inspection result normal?
DTC Items
(CONSULT-III screen terms) DTC detection condition Possible cause
B2578 IN-VEHICLE SENSOR The front in-vehicle sensor recognition temper-
ature is too high.
 Front in-vehicle sensor
 A/C auto amp.
 Harness or connectors
(The sensor circuit is open or short-
ed.)
B2579
The front in-vehicle sensor recognition temper-
ature is too low.
+
−Voltage
(Approx.)
Front in-vehicle sensor
Connector Terminal M73 1 Ground 5 V
Front in-vehicle sensor —Continuity
Connector Terminal
M73 2 Ground Existed
Revision: 2010 May2011 QX56

B257B, B257C AMBIENT SENSORHAC-77
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
B257B, B257C AMBIENT SENSOR
DTC LogicINFOID:0000000006275912
DTC DETECTION LOGIC
NOTE:
 If DTC is displayed along with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to HAC-
72, "DTC Logic".
 If DTC is displayed along with DTC U1010, fi rst perform the trouble diagnosis for DTC U1010. HAC-73,
"DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” m ode of “HVAC” using CONSULT-III.
3. Check DTC.
Is DTC detected?
YES >> Refer to HAC-77, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275913
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. Disconnect A/C auto amp.connector.
3. Check continuity between ambient sensor har ness connector and A/C auto amp. harness connector.
Is the inspection result normal?
DTC Items
(CONSULT-III 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.
+
−Vol tag e
(Approx.)
Ambient sensor
Connector Terminal E76 1 Ground 5 V
Ambient sensor —Continuity
Connector Terminal
E76 2 Ground Existed
Revision: 2010 May2011 QX56

HAC-80
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B2581, B2582 INTAKE SENSOR
B2581, B2582 INTAKE SENSOR
DTC LogicINFOID:0000000006275915
DTC DETECTION LOGIC
NOTE:
 If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
HAC-
72, "DTC Logic".
 If DTC is displayed along with DTC U1010, fi rst perform the trouble diagnosis for DTC U1010. HAC-73,
"DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” m ode of “HVAC” using CONSULT-III.
3. Check DTC.
Is DTC detected?
YES >> Refer to HAC-80, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275916
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. Disconnect A/C auto amp. connector.
3. Check continuity between intake sensor har ness connector and A/C auto amp. harness connector.
Is the inspection result normal?
DTC Items
(CONSULT-III 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.
+
−Voltage
(Approx.)
Intake sensor
Connector Terminal M257 1 Ground 5 V
Intake sensor —Continuity
Connector Terminal
M257 2 Ground Existed
Revision: 2010 May2011 QX56

B262A, B262B, B2657, B2658 EXHAUST GAS/OUTSIDE ODOR DETECTING
SENSOR
HAC-83
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
B262A, B262B, B2657, B2658 EXHAU ST GAS/OUTSIDE ODOR DETECT-
ING SENSOR
DTC LogicINFOID:0000000006275918
DTC DETECTION LOGIC
NOTE:
 If DTC is displayed along with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to HAC-
72, "DTC Logic".
 If DTC is displayed along with DTC U1010, fi rst perform the trouble diagnosis for DTC U1010. HAC-73,
"DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” m ode of “HVAC” using CONSULT-III.
3. Check DTC.
Is DTC detected?
YES >> Refer to HAC-83, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275919
1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check 10A fuse [No.4, lo cated in fuse block (J/B)]
NOTE:
Refer to PG-140, "
Fuse, Connector and Terminal Arrangement".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.CHECK EXHAUST GAS / OUTSIDE ODOR DETECTING SENSOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect exhaust gas / outside odor detecting sensor connector.
3. Turn ignition switch ON.
4. Check voltage between exhaust gas / outside odor detecting sensor harness and ground.
DTC Items
(CONSULT-III screen terms) DTC detection condition Possible cause
B262A GAS SENSOR Exhaust gas / outside odor detecting sensor
duty ratio 15% or less.
 Exhaust gas / outside odor detect-
ing sensor
 A/C auto amp.
 Harness or connectors (The sensor circuit is open or short-
ed.)
B262B
Exhaust gas / outside odor detecting sensor
duty ratio 85% or more.
B2657 CAS SENSOR CIRCUIT Exhaust gas / outside odor detecting sensor
duty ratio 0%.
B2658 Exhaust gas / outside odor detecting sensor
duty ratio 100%.
+
−Vol tag e
(Approx.)
Exhaust gas / outside odor detect-
ing sensor
Connector Terminal E117 1 Ground Battery voltage
Revision: 2010 May2011 QX56

HAC-86
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B2630, B2631 SUNLOAD
SENSOR (DRIVER SIDE)
B2630, B2631 SUNLOAD SEN SOR (DRIVER SIDE)
DTC LogicINFOID:0000000006275920
DTC DETECTION LOGIC
NOTE:
 If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to HAC-
72, "DTC Logic".
 If DTC is displayed along with DTC U1010, fi rst perform the trouble diagnosis for DTC U1010. HAC-73,
"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, use a lamp (60 W or more) that is pointed at the sunload sensor.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” m ode of “HVAC” using CONSULT-III.
3. Check DTC.
Is DTC detected?
YES >> Refer to HAC-103, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275921
1.CHECK SUNLOAD SENSOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect sunload sensor connector.
3. Turn ignition switch ON.
4. Check voltage between sunload sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK SUNLOAD SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between sunload sensor harne ss connector and A/C auto amp. harness connector.
DTCItems
(CONSULT-III screen terms) DTC detection condition Possible cause
B2630 SUNLOAD SENSOR Detected calorie at sunload sensor (driver side)
2832 W/m
2 (2436 kcal/m2·h) or more.
 Sunload sensor
 A/C auto amp.
 Harness or connectors
[The sensor circui t (driver side) is
open or shorted.]
B2631
Detected calorie at sunload sensor (driver side)
64.7 W/m
2 (55.6 kcal/m2·h) or less.
+
−Voltage
(Approx.)
Sunload sensor
Connector Terminal M74 2 Ground 5 V
Sunload sensor —Continuity
Connector Terminal
M74 3 Ground Existed
Revision: 2010 May2011 QX56

B2667, B2668 SUNLOAD SENSOR (PASSENGER SIDE)
HAC-103
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
B2667, B2668 SUNLOAD SENS OR (PASSENGER SIDE)
DTC LogicINFOID:0000000006275937
DTC DETECTION LOGIC
NOTE:
 If DTC is displayed along with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to HAC-
72, "DTC Logic".
 If DTC is displayed along with DTC U1010, fi rst perform the trouble diagnosis for DTC U1010. HAC-73,
"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, use a lamp (60 W or more) that is pointed at the sunload sensor.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” m ode of “HVAC” using CONSULT-III.
3. Check DTC.
Is DTC detected?
YES >> Refer to HAC-103, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275938
1.CHECK SUNLOAD SENSOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect sunload sensor connector.
3. Turn ignition switch ON.
4. Check voltage between sunload sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK SUNLOAD SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between sunload sensor harnes s connector and A/C auto amp. harness connector.
DTCItems
(CONSULT-III screen terms) DTC detection condition Possible cause
B2667 PASS SUNLOAD SENSOR Detected calorie at sunload sensor (passenger
side) 2832 W/m
2 (2436 kcal/m2·h) or more.
 Sunload sensor
 A/C auto amp.
 Harness or connectors
[The sensor circuit (passenger
side) is open or shorted.]
B2668
Detected calorie at sunload sensor (passenger
side) 64.7 W/m
2 (55.6 kcal/m2·h) or less.
+
−Vol tag e
(Approx.)
Sunload sensor
Connector Terminal M74 1 Ground 5 V
Sunload sensor —Continuity
Connector Terminal
M74 3 Ground Existed
Revision: 2010 May2011 QX56

HAC-106
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B266B, B266C REAR IN-VEHICLE SENSOR
B266B, B266C REAR IN-VEHICLE SENSOR
DTC LogicINFOID:0000000006275940
DTC DETECTION LOGIC
NOTE:
 If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
HAC-
72, "DTC Logic".
 If DTC is displayed along with DTC U1010, fi rst perform the trouble diagnosis for DTC U1010. HAC-73,
"DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” m ode of “HVAC” using CONSULT-III.
3. Check DTC.
Is DTC detected?
YES >> Refer to HAC-106, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275941
1.CHECK REAR IN-VEHICLE SENSOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect rear in-vehicle sensor connector.
3. Turn ignition switch ON.
4. Check voltage between rear in-vehi cle sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK REAR IN-VEHCLE SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between rear in-v ehicle sensor harness connector and ground.
Is the inspection result normal?
DTC Items
(CONSULT-III screen terms) DTC detection condition Possible cause
B266B REAR IN-VEHICLE SEN The rear in-vehicle sensor recognition tempera-
ture is too high.
 Rear in-vehicle sensor
 A/C auto amp.
 Harness or connectors
(The sensor circuit is open or short-
ed.)
B266C
The rear in-vehicle sensor recognition tempera-
ture is too low.
+
−Voltage
(Approx.)
Rear in-vehicle sensor
Connector Terminal B211 1 Ground 5 V
Rear in-vehicle sensor —Continuity
Connector Terminal
B211 2 Ground Existed
Revision: 2010 May2011 QX56

B27B0 A/C AUTO AMP.HAC-109
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
B27B0 A/C AUTO AMP.
DTC LogicINFOID:0000000006275946
DTC DETECTION LOGIC
NOTE:
 If DTC is displayed along with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to HAC-
72, "DTC Logic".
 If DTC is displayed along with DTC U1010, fi rst perform the trouble diagnosis for DTC U1010. HAC-73,
"DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” m ode of “HVAC” using CONSULT-III.
3. Check DTC.
Is DTC detected?
YES >> Refer to HAC-109, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275947
1.PERFORM SELF DIAGNOSTIC
With CONSULT-III
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” m ode of “HVAC” using CONSULT-III.
3. Touch “ERASE”.
4. Turn ignition switch OFF.
5. Turn ignition switch ON.
6. Perform “DTC CONFIRMATION PROCEDURE”. Refer to HAC-109, "
DTC Logic".
Is DTC detected again?
YES >> Replace A/C auto amp. Refer to HAC-146, "Removal and Installation".
NO >> INSPECTION END
DTC Items
(CONSULT-III 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: 2010 May2011 QX56

REAR AUTOMATIC AIR CONDITIONING SYSTEMHAC-135
< SYMPTOM DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
REAR AUTOMATIC AIR CONDITIONING SYSTEM
Diagnosis Chart By SymptomINFOID:0000000006275981
NOTE:
 Perform the self-diagnoses with CONSULT-III before performing the symptom diagnosis. If DTC is detected,
perform the corresponding diagnosis.
 The following table is based on the condition that fr ont automatic air conditioning system operates normally.
Symptom Corresponding malfunction part Reference
 Rear air conditioning system cannot be controlled. (Front A/C control)
 Operation status of rear air conditioning system is not indicated on front display. Multi AV system
AV- 1 9 9 , "
Symptom Table"
Rear air conditioning sys-
tem cannot be controlled.
(Rear A/C control)Operation status of
rear air conditioning
system is not indicated
on rear A/C control
display
 Power supply system of rear A/C
control
 Rear A/C control HAC-115, "
REAR A/C CONTROL :
Diagnosis Procedure"
Operation status of
rear air conditioning
system is indicated on
rear A/C control dis-
play Communication circuit between rear
A/C control and A/C auto amp.
 A/C auto amp. HAC-127, "
Diagnosis Procedure"
 Air outlet does not change.
 Rear mode door motor does not operate normally.  Circuit between rear mode door mo-
tor and A/C auto amp.
 Rear mode door motor control link- age
 Front mode door motor
 A/C auto amp. HAC-116, "REAR MODE DOOR
MOTOR : Diagnosis Procedure"
 Discharge air temperature does not change.
 Rear air mix door motor does not operate normally.  Circuit between rear air mix door
motor and A/C auto amp.
 Rear air mix door motor installation condition
 Rear air mix door motor
 A/C auto amp. HAC-114, "REAR AIR MIX DOOR
MOTOR : Diagnosis Procedure"
Rear blower motor operation is malfunctioning.
 Power supply system of rear blower
motor
 Circuit between rear blower motor
and A/C auto amp..
 Rear blower motor
 A/C auto amp. HAC-131, "Diagnosis Procedure"
 Insufficient cooling.
 No cool air comes out. (Air flow volume is normal.)  Power supply system of rear A/C re-
lay
 Circuit between rear A/C relay and A/C auto amp..
 Circuit between rear A/C relay and rear A/C solenoid valve.
 Circuit between rear A/C solenoid
valve and ground.
 Rear A/C relay
 Rear A/C solenoid valve
 A/C auto amp.
 Refrigerant cycle
 Air leakage from each duct
 Temperature setti ng trimmer (rear) HAC-139, "REAR AIR CONDI-
TIONER : Diagnosis Procedure"
Revision: 2010 May2011 QX56