2011 INFINITI QX56 air condition
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![INFINITI QX56 2011 Factory Service Manual
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](/manual-img/42/57033/w960_57033-3211.png "INFINITI QX56 2011 Factory Service Manual
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")
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
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![INFINITI QX56 2011 Factory Service Manual
B266B, B266C REAR IN-VEHICLE SENSORHAC-107
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK REAR IN-](/manual-img/42/57033/w960_57033-3212.png "INFINITI QX56 2011 Factory Service Manual
B266B, B266C REAR IN-VEHICLE SENSORHAC-107
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK REAR IN-")
B266B, B266C REAR IN-VEHICLE SENSORHAC-107
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
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E
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G H
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K L
M A
B
HAC
N
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YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK REAR IN-VEHICLE SENSOR
Check rear in-vehicle sensor. Refer to HAC-107, "
Component Inspection".
Is the inspection result normal?
YES >> Replace A/C auto amp.. Refer to HAC-146, "Removal and Installation".
NO >> Replace rear in-vehicle sensor. Refer to HAC-148, "
REAR A/C UNIT ASSEMBLY : Removal and
Installation".
4.CHECK REAR IN-VEHCLE SENSOR POWER SUPPLY CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between rear in-vehicle sens or harness connector and A/C auto amp. harness connec-
tor.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair harness or connector.
5.CHECK REAR IN-VEHCLE SENSOR PO WER SUPPLY CIRCUIT FOR GROUND SHORT
Check continuity between rear in-v ehicle sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair harness or connector.
6.CHECK REAR IN-VEHICLE SENSOR PO WER SUPPLY CIRCUIT FOR POWER SHORT
1. Turn ignition switch ON.
2. Check voltage between rear in-vehicle sensor harness connector and ground.
Is the inspection result normal?
YES >> Replace A/C auto amp.. Refer to HAC-146, "Removal and Installation".
NO >> Repair harness or connector.
Component InspectionINFOID:0000000006275942
1.CHECK REAR IN-VEHICLE SENSOR
1. Turn ignition switch OFF.
2. Disconnect rear in-vehicle sensor connector.
3. Check resistance between rear in-vehicle sensor terminals.
Rear in-vehicle sensor A/C auto amp. Continuity
Connector Terminal Connector Terminal
B211 1 M50 8 Existed
Rear in-vehicle sensor —Continuity
Connector Terminal
B211 1 Ground Not existed
+ −Vol tag e
(Approx.)
Rear in-vehicle sensor
Connector Terminal B211 1 Ground 0 V
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Service Manual
HAC-108
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B266B, B266C REAR IN-VEHICLE SENSOR
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace rear in-vehicle sensor. Refer t](/manual-img/42/57033/w960_57033-3213.png "INFINITI QX56 2011 Factory Service Manual
HAC-108
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B266B, B266C REAR IN-VEHICLE SENSOR
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace rear in-vehicle sensor. Refer t")
HAC-108
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B266B, B266C REAR IN-VEHICLE SENSOR
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace rear in-vehicle sensor. Refer to
HAC-148, "
REAR A/C UNIT ASSEMBLY : Removal and
Installation".
Te r m i n a lCondition
Resistance: kΩ
Temperature: °C ( °F)
12 −
15 (5) 12.34
− 10 (14) 9.62
− 5 (23) 7.56
0 (32) 6.00
5 (41) 4.80
10 (50) 3.87
15 (59) 3.14
20 (68) 2.57
25 (77) 2.12
30 (86) 1.76
35 (95) 1.47
40 (104) 1.23 45 (113) 1.04
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Service Manual
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:
I](/manual-img/42/57033/w960_57033-3214.png "INFINITI QX56 2011 Factory Service Manual
B27B0 A/C AUTO AMP.HAC-109
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
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G H
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M A
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HAC
N
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B27B0 A/C AUTO AMP.
DTC LogicINFOID:0000000006275946
DTC DETECTION LOGIC
NOTE:
I")
B27B0 A/C AUTO AMP.HAC-109
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
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G H
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M A
B
HAC
N
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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
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![INFINITI QX56 2011 Factory Service Manual
HAC-110
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
A/C AUTO AMP.
A/C AUTO AMP. : Diagnosis ProcedureINFOID:0000000006275948](/manual-img/42/57033/w960_57033-3215.png "INFINITI QX56 2011 Factory Service Manual
HAC-110
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
A/C AUTO AMP.
A/C AUTO AMP. : Diagnosis ProcedureINFOID:0000000006275948")
HAC-110
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
A/C AUTO AMP.
A/C AUTO AMP. : Diagnosis ProcedureINFOID:0000000006275948
1.CHECK FUSE
Check 10A fuse [No. 9, 19, and 4, located in the 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 A/C AUTO AMP. POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check voltage between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector between A/C auto amp. and fuse block (J/B).
3.CHECK A/C AUTO AMP. GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
FRONT AIR MIX DOOR MOTOR (DRIVER SIDE)
FRONT AIR MIX DOOR MOTOR (DRI VER SIDE) : Diagnosis ProcedureINFOID:0000000006275949
1.CHECK FRONT AIR MIX DOOR MOTO R (DRIVER SIDE) POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between front air mix door motor LH harness connector and ground.
+
− Vo l ta g e
A/C auto amp. Ignition switch position
Connector Terminal OFF ACC ON
M50 4
Ground Approx. 0 V Battery voltage Battery voltage
23 Approx. 0 V Approx. 0 V Battery voltage 3 Battery voltage Battery voltage Battery voltage
A/C auto amp. —Continuity
Connector Terminal
M50 2
Ground Existed
22
37
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Service Manual
POWER SUPPLY AND GROUND CIRCUITHAC-111
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK](/manual-img/42/57033/w960_57033-3216.png "INFINITI QX56 2011 Factory Service Manual
POWER SUPPLY AND GROUND CIRCUITHAC-111
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK")
POWER SUPPLY AND GROUND CIRCUITHAC-111
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK FRONT AIR MIX DOOR MOTOR (DRIVER SIDE) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front air mix door motor LH connector.
3. Check continuity between front air mix door motor LH harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK INSTALLATION OF FRONT AI R MIX DOOR MOTOR (DRIVER SIDE)
Check front air mix door motor (driver side) is properly installed. Refer to HAC-152, "
Exploded View".
Is the inspection result normal?
YES >> Replace front air mix door motor (driver side). Refer to HAC-153, "AIR MIX DOOR MOTOR :
Removal and Installation".
NO >> Repair or replace malfunctioning part.
4.CHECK FRONT AIR MIX DOOR MOTOR (DRIVER SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front air mix door motor LH connector and A/C auto amp. connector.
3. Check continuity between front air mix door moto r LH harness connector and A/C auto amp. harness con-
nector.
Is the inspection result normal?
YES >> Replace A/C auto amp.. Refer to HAC-146, "Removal and Installation".
NO >> Repair harness or connector.
FRONT AIR MIX DOOR MO TOR (PASSENGER SIDE)
FRONT AIR MIX DOOR MOTOR (PASSEN GER SIDE) : Diagnosis Procedure
INFOID:0000000006275950
1.CHECK FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE) POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between front air mix door motor RH harness connector and ground.
+
−Vol tag e
(Approx.)
Front air mix door motor LH
Connector Terminal M252 1 Ground 12 V
Front air mix door motor LH —Continuity
Connector Terminal
M252 2 Ground Existed
Front air mix door motor LH A/C auto amp. Continuity
Connector Terminal Connector Terminal
M252 1 M50 17 Existed
+ −Vol tag e
(Approx.)
Front air mix door motor RH
Connector Terminal M255 1 Ground 12 V
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Service Manual
HAC-112
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK FRONT AIR MIX DOOR MOTO
R (PASSEN](/manual-img/42/57033/w960_57033-3217.png "INFINITI QX56 2011 Factory Service Manual
HAC-112
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK FRONT AIR MIX DOOR MOTO
R (PASSEN")
HAC-112
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK FRONT AIR MIX DOOR MOTO
R (PASSENGER SIDE) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front air mix door motor RH connector.
3. Check continuity between front air mi x door motor RH harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK INSTALLATION OF FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE)
Check front air mix door motor (passenger side) is properly installed. Refer to HAC-152, "
Exploded View".
Is the inspection result normal?
YES >> Replace front air mix door motor (passenger side). Refer to HAC-153, "AIR MIX DOOR MOTOR :
Removal and Installation".
NO >> Repair or replace malfunctioning part.
4.CHECK FRONT AIR MIX DOOR MOTOR (P ASSENGER SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front air mix door motor RH connector and A/C auto amp. connector.
3. Check continuity between front air mix door motor RH harness connector and A/C auto am\
p. harness con- nector.
Is the inspection result normal?
YES >> Replace A/C auto amp.. Refer to HAC-146, "Removal and Installation".
NO >> Repair harness or connector.
FRONT MODE DOOR MOTOR
FRONT MODE DOOR MOTOR : Diagnosis ProcedureINFOID:0000000006275951
1.CHECK FRONT MODE DOOR MOTOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between front mode door motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK FRONT MODE DOOR MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front mode door motor connector.
Front air mix door motor RH —Continuity
Connector Terminal
M255 2 Ground Existed
Front air mix door motor RH A/C auto amp. Continuity
Connector Terminal Connector Terminal
M255 1 M50 17 Existed
+ −Voltage
(Approx.)
Front mode door motor
Connector Terminal M253 1 Ground 12 V
Revision: 2010 May2011 QX56
Page 3219 of 5598
![INFINITI QX56 2011 Factory Service Manual
POWER SUPPLY AND GROUND CIRCUITHAC-113
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
3. Check continuity between front mode door motor harness connector and](/manual-img/42/57033/w960_57033-3218.png "INFINITI QX56 2011 Factory Service Manual
POWER SUPPLY AND GROUND CIRCUITHAC-113
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
3. Check continuity between front mode door motor harness connector and")
POWER SUPPLY AND GROUND CIRCUITHAC-113
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
3. Check continuity between front mode door motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK INSTALLATION OF FRONT MO DE DOOR MOTOR CONTROL LINKAGE
Check front mode door motor control linkage is properly installed. Refer to HAC-152, "
Exploded View".
Is the inspection result normal?
YES >> Replace front mode door motor. Refer to HAC-153, "MODE DOOR MOTOR : Removal and Instal-
lation".
NO >> Repair or replace malfunctioning part.
4.CHECK FRONT MODE DOOR MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front mode door motor connector and A/C auto amp. connector.
3. Check continuity between front mode door moto r harness connector and A/C auto amp. harness connec-
tor.
Is the inspection result normal?
YES >> Replace A/C auto amp.. Refer to HAC-146, "Removal and Installation".
NO >> Repair harness or connector.
INTAKE DOOR MOTOR
INTAKE DOOR MOTOR : Diagnosis ProcedureINFOID:0000000006275952
1.CHECK INTAKE MODE DOOR MOTOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between intake mode door motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK INTAKE MODE DOOR MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect intake mode door motor connector.
3. Check continuity between intake mode door motor harness connector and ground.
Front mode door motor —Continuity
Connector Terminal
M253 2 Ground Existed
Front mode door motor A/C auto amp. Continuity
Connector Terminal Connector Terminal
M253 1 M50 17 Existed
+ −Vol tag e
(Approx.)
Intake mode door motor
Connector Terminal M254 1 Ground 12 V
Intake mode door motor —Continuity
Connector Terminal
M254 2 Ground Existed
Revision: 2010 May2011 QX56