2011 INFINITI QX56 Factory Service Manual

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Page 3185 of 5598

INFINITI QX56 2011 Factory Service Manual
B257B, B257C AMBIENT SENSORHAC-79
< 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 >> INSPECTION END
NO >> Replace ambient

Page 3186 of 5598

INFINITI QX56 2011 Factory Service Manual
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 al

Page 3187 of 5598

INFINITI QX56 2011 Factory Service Manual
B2581, B2582 INTAKE SENSORHAC-81
< 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 INTAKE SENSOR
Chec

Page 3188 of 5598

INFINITI QX56 2011 Factory Service Manual
HAC-82
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B2581, B2582 INTAKE SENSOR
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace intake sensor. Refer to
HAC-150, "
Remova

Page 3189 of 5598

INFINITI QX56 2011 Factory Service Manual
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

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

Page 3190 of 5598

INFINITI QX56 2011 Factory Service Manual
HAC-84
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B262A, B262B, B2657, B2658 EX
HAUST GAS/OUTSIDE ODOR DETECTING
SENSOR
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harne

Page 3191 of 5598

INFINITI QX56 2011 Factory Service Manual
B262A, B262B, B2657, B2658 EXHAUST GAS/OUTSIDE ODOR DETECTING
SENSOR
HAC-85
< 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 7.
NO >> Repair harn

Page 3192 of 5598

INFINITI QX56 2011 Factory Service Manual
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

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

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