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![INFINITI QX56 2011 Factory Service Manual
B2630, B2631 SUNLOAD SENSOR (DRIVER SIDE)HAC-87
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Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair INFINITI QX56 2011 Factory Service Manual
B2630, B2631 SUNLOAD SENSOR (DRIVER SIDE)HAC-87
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair](/manual-img/42/57033/w960_57033-3192.png)
B2630, B2631 SUNLOAD SENSOR (DRIVER SIDE)HAC-87
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK SUNLOAD SENSOR
Check sunload sensor. Refer to HAC-104, "
Component Inspection".
Is the inspection result normal?
YES >> Replace A/C auto amp.. Refer to HAC-146, "Removal and Installation".
NO >> Replace sunload sensor. Refer to HAC-149, "
Removal and Installation".
4.CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR OPEN
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.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair harness or connector.
5.CHECK SUNLOAD SENSOR POWER SU PPLY CIRCUIT FOR GROUND SHORT
Check continuity between sunload sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair harness or connector.
6.CHECK SUNLOAD SENSOR POWER SU PPLY CIRCUIT FOR POWER SHORT
1. Turn ignition switch ON.
2. Check voltage between sunload 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:0000000006275922
1.CHECK SUNLOAD SENSOR
1. Turn ignition switch OFF.
2. Reconnect sunload sensor connector and A/C auto amp. connector.
3. Turn ignition switch ON.
4. Check input voltage from sunload sensor between A/C auto amp. harness connector and ground. Refer to
applicable table for normal value.
Sunload sensor A/C auto amp. Continuity
Connector Terminal Connector Terminal
M74 2 M50 9 Existed
Sunload sensor —Continuity
Connector Terminal
M74 2 Ground Not existed
+ −Vol tag e
(Approx.)
Sunload sensor
Connector Terminal M74 2 Ground 0 V
Revision: 2010 May2011 QX56
Page 3194 of 5598
HAC-88
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B2630, B2631 SUNLOAD
SENSOR (DRIVER SIDE)
NOTE:
When checking indoors, use a lamp of approximately 60 W. Move the lamp towards and away from the
sensor to check.
The sunload amount produced by direct sunshine in fa ir weather is equivalent to approximately 0.770
kW/m
2 (662 kcal/m2·h).
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace sunload sensor. Refer to HAC-149, "
Removal and Installation".
+
−
A/C auto amp.
Connector Terminal M50 9 Ground
JPIIA1659GB
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Service Manual
B2632, B2633 FRONT AIR MIX DOOR MOTOR (DRIVER SIDE)
HAC-89
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B2632, B2633 FRONT AIR MIX DO OR MOTOR (DRIVER SIDE INFINITI QX56 2011 Factory Service Manual
B2632, B2633 FRONT AIR MIX DOOR MOTOR (DRIVER SIDE)
HAC-89
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B2632, B2633 FRONT AIR MIX DO OR MOTOR (DRIVER SIDE](/manual-img/42/57033/w960_57033-3194.png)
B2632, B2633 FRONT AIR MIX DOOR MOTOR (DRIVER SIDE)
HAC-89
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B2632, B2633 FRONT AIR MIX DO OR MOTOR (DRIVER SIDE)
DTC LogicINFOID:0000000006275923
DTC DETECTION 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-89, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275924
1.CHECK FRONT AIR MIX DOOR MOTOR ( DRIVER SIDE) COMMUNICATION SIGNAL
1. Turn ignition switch ON.
2. Check output waveform between front air mix door motor LH harness connector and ground with the oscil-
loscope.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 3.
2.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.
DTC Items
(CONSULT-III screen terms) DTC detection condition Possible cause
B2632
DR AIR MIX DOOR MOT Front air mix door motor (driver side)
PBR position 95% or more
Front air mix door
motor (driver side)
(PBR internal circuit is open or short-
ed)
Front air mix door motor (driver side)
installation condition
A/C auto amp.
Harness and connector (LIN communication line is open or
shorted)
B2633
Front air mix door motor (driver side)
PBR position 5% or less
+
−Output waveform
Front air mix door motor LH
Connector Terminal
M252 3 Ground
SJIA1453J
Revision: 2010 May2011 QX56
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HAC-90
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B2632, B2633 FRONT AIR MIX
DOOR MOTOR (DRIVER SIDE)
3.CHECK FRONT AIR MIX DOOR MOTOR (DRIVE R SIDE) COMMUNICATION SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front air mix door motor LH 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 motor LH A/C auto amp. Continuity
Connector Terminal Connector Terminal
M252 3 M50 16 Existed
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Service Manual
B2634, B2635 FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE)
HAC-91
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B2634, B2635 FRONT AIR MIX DO OR MOTOR (PASSENGE INFINITI QX56 2011 Factory Service Manual
B2634, B2635 FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE)
HAC-91
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B2634, B2635 FRONT AIR MIX DO OR MOTOR (PASSENGE](/manual-img/42/57033/w960_57033-3196.png)
B2634, B2635 FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE)
HAC-91
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B2634, B2635 FRONT AIR MIX DO OR MOTOR (PASSENGER SIDE)
DTC LogicINFOID:0000000006275925
DTC DETECTION 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-91, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275926
1.CHECK FRONT AIR MIX DOOR MOTOR (P ASSENGER SIDE) COMMUNICATION SIGNAL
1. Turn ignition switch ON.
2. Check output waveform between front air mi x door motor RH harness connector and ground with the
oscilloscope.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 3.
2.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".
DTCItems
(CONSULT-III screen terms) DTC detection condition Possible cause
B2634
PASS AIR MIX DOOR MOT Front air mix door motor (passenger
side) PBR position 95% or more
Front air mix door motor (passenger
side)
(PBR internal circuit is open or short-
ed)
Front air mix door motor (passenger side) installation condition
A/C auto amp.
Harness and connector
(LIN communication line is open or
shorted)
B2635
Front air mix door motor (passenger
side) PBR position 5% or less
+
−Output waveform
Front air mix door motor RH
Connector Terminal
M255 3 Ground
SJIA1453J
Revision: 2010 May2011 QX56
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HAC-92
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B2634, B2635 FRONT AIR MIX DO
OR MOTOR (PASSENGER SIDE)
NO >> Repair or replace malfunctioning part.
3.CHECK FRONT AIR MIX DOOR MOTOR (PASSEN GER SIDE) COMMUNICATION SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front air mix door motor RH 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 air mix door motor RH A/C auto amp. Continuity
Connector Terminal Connector Terminal
M255 3 M50 16 Existed
Revision: 2010 May2011 QX56
Page 3199 of 5598
![INFINITI QX56 2011 Factory Service Manual
B2636, B2637, B2638, B2639, B2654, B2655 FR ONT MODE DOOR MOTOR
HAC-93
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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B2636, B2637, B2638, B2639, B2654, B265 INFINITI QX56 2011 Factory Service Manual
B2636, B2637, B2638, B2639, B2654, B2655 FR ONT MODE DOOR MOTOR
HAC-93
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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B2636, B2637, B2638, B2639, B2654, B265](/manual-img/42/57033/w960_57033-3198.png)
B2636, B2637, B2638, B2639, B2654, B2655 FR ONT MODE DOOR MOTOR
HAC-93
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B2636, B2637, B2638, B2639, B2654, B2655 FRONT MODE DOOR MOTOR
DTC LogicINFOID:0000000006275927
DTC DETECTION 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-93, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275928
1.CHECK FRONT MODE DOOR MOTOR COMMUNICATION SIGNAL
1. Turn ignition switch ON.
2. Check output waveform between front mode door motor harness connector and ground with the oscillo-
scope.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 3.
2.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".
DTCItems
(CONSULT-III screen terms) DTC detection condition Possible cause
B2636 DR VENT DOOR FAIL When the malfunctioning door position
is detected at VENT position
Front mode door motor(PBR internal circuit is open or short-
ed)
Front mode door motor control linkage installation condition
A/C auto amp.
Harness and connector (LIN communication line is open or
shorted)
B2637 DR B/L DOOR FAIL
When the malfunctioning door position
is detected at B/L position
B2638 DR D/F1 DOOR FAIL When the malfunctioning door position
is detected at FOOT position
B2639 DR DEF DOOR FAIL When the malfunctioning door position
is detected at DEF position
B2654 D/F2 VENT DOOR FAIL When the malfunctioning door position
is detected at D/F position
B2655 B/L DOOR FAIL When the malfunctioning door position
is detected at B/L position
+
−Output waveform
Front mode door motor
Connector Terminal
M253 3 Ground
SJIA1453J
Revision: 2010 May2011 QX56
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HAC-94
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B2636, B2637, B2638, B
2639, B2654, B2655 FRON T MODE DOOR MOTOR
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.
3.CHECK FRONT MODE DOOR MOTOR COMMUNICATION SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front mode door moto r 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.
Front mode door motor A/C auto amp. Continuity
Connector Terminal Connector Terminal
M253 3 M50 16 Existed
Revision: 2010 May2011 QX56