2011 INFINITI QX56 air condition

HAC-98
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B2661, B2662, B2
663 UPPER VENTILATOR DOOR MOTOR
NO >> Repair or replace malfunctioning part.
3.CHECK UPPER VENTILATOR DOOR MO TOR COMMUNICATION SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect upper vent door motor and A/C auto amp. connector.
3. Check continuity between upper vent 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.
Upper vent door motor A/C auto amp. Continuity
Connector Terminal Connector Terminal
M256 3 M50 16 Existed
Revision: 2010 May2011 QX56

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

HAC-104
< DTC/CIRCUIT DIAGNOSIS >[AUTOMATIC AIR CONDITIONING]
B2667, B2668 SUNLOAD SENS
OR (PASSENGER SIDE)
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 harne ss 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 SUPPLY 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 SUPPLY 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:0000000006275939
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 1 M50 29 Existed
Sunload sensor —Continuity
Connector Terminal
M74 1 Ground Not existed
+ −Voltage
(Approx.)
Sunload sensor
Connector Terminal M74 1 Ground 0 V
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