2011 INFINITI QX56 door

B2664, B2665 REAR AIR MIX DOOR MOTOR
HAC-99
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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B2664, B2665 REAR AI R MIX DOOR MOTOR
DTC LogicINFOID:0000000006275933
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-99, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275934
1.CHECK REAR AIR MIX DOOR MOTOR COMMUNICATION SIGNAL
1. Turn ignition switch ON.
2. Check output waveform between rear air mix 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 REAR AIR MIX DOOR MOTOR
Check rear air mix door motor is properly installed. Refer to HAC-152, "
Exploded View".
Is the inspection result normal?
YES >> Replace rear air mix door motor. Refer to HAC-154, "REAR AIR MIX DOOR MOTOR : Removal
and Installation".
NO >> Repair or replace malfunctioning part.
DTC Items
(CONSULT-III screen terms) DTC detection condition Possible cause
B2664
REAR AIR MIX DOOR MOT Rear air mix door motor PBR position
95% or more
 Rear air mix door motor
(PBR internal circuit is open or short-
ed)
 Rear air mix door motor installation
condition
 A/C auto amp.
 Harness and connector (LIN communication line is open or
shorted)
B2665
Rear air mix door motor PBR position
5% or less
+
−Output waveform
Rear air mix door motor
Connector Terminal
B210 3 Ground
SJIA1453J
Revision: 2010 May2011 QX56

HAC-100
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B2664, B2665 REAR AI
R MIX DOOR MOTOR
3.CHECK REAR AIR MIX DOOR MOTOR COMMUNICATION SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear air mix door mo tor and A/C auto amp. connector.
3. Check continuity between rear air mix door mo tor 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.
Rear air mix door motor A/C auto amp. Continuity
Connector Terminal Connector Terminal
B210 3 M50 16 Existed
Revision: 2010 May2011 QX56

B2666, B2669, B266A REAR MODE DOOR MOTOR
HAC-101
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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B2666, B2669, B266A REAR MODE DOOR MOTOR
DTC LogicINFOID:0000000006275935
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-101, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275936
1.CHECK REAR MODE DOOR MO TOR COMMUNICATION SIGNAL
1. Turn ignition switch ON.
2. Check output waveform between rear 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 REAR MO DE DOOR MOTOR CONTROL LINKAGE
Check rear mode door motor control linkage is properly installed. Refer to HAC-152, "
Exploded View".
Is the inspection result normal?
YES >> Replace rear mode door motor. Refer to HAC-154, "REAR MODE DOOR MOTOR : Removal and
Installation".
NO >> Repair or replace malfunctioning part.
DTC Items
(CONSULT-III screen terms) DTC detection condition Possible cause
B2666
REAR MODE DOOR MOT When the malfunctioning door position
is detected at VENT position
 Rear mode door motor
(PBR internal circuit is open or short-
ed)
 Rear mode door motor control linkage
installation condition
 A/C auto amp.
 Harness and connector (LIN communication line is open or
shorted)
B2669
When the malfunctioning door position
is detected at B/L position
B266A When the malfunctioning door position
is detected at FOOT position
+
−Output waveform
Rear mode door motor
Connector Terminal
B209 3 Ground
SJIA1453J
Revision: 2010 May2011 QX56

HAC-102
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B2666, B2669, B266A REAR MODE DOOR MOTOR
3.CHECK REAR MODE DOOR MOTOR COMMUNICATION SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear mode door moto r and A/C auto amp. connector.
3. Check continuity between rear 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.
Rear mode door motor A/C auto amp. Continuity
Connector Terminal Connector Terminal
B209 3 M50 16 Existed
Revision: 2010 May2011 QX56

B2667, B2668 SUNLOAD SENSOR (PASSENGER SIDE)
HAC-103
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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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

B2667, B2668 SUNLOAD SENSOR (PASSENGER SIDE)
HAC-105
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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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 29 Ground
JPIIA1659GB
Revision: 2010 May2011 QX56

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

POWER SUPPLY AND GROUND CIRCUITHAC-111
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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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