2011 INFINITI QX56 ground

B2634, B2635 FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE)
HAC-91
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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HAC
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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

B2636, B2637, B2638, B2639, B2654, B2655 FR ONT MODE DOOR MOTOR
HAC-93
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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HAC
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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

B263D, B263E, B263F INTAKE DOOR MOTOR
HAC-95
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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B263D, B263E, B263F INTAKE DOOR MOTOR
DTC LogicINFOID:0000000006275929
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-95, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275930
1.CHECK INTAKE DOOR MOTOR COMMUNICATION SIGNAL
1. Turn ignition switch ON.
2. Check output waveform between intake door motor harness connector and ground with the oscilloscope.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK INSTALLATION OF INTAKE DOOR MOTOR CONTROL LINKAGE
Check intake door motor control linkage is properly installed. Refer to HAC-152, "
Exploded View".
Is the inspection result normal?
YES >> Replace intake door motor. Refer to HAC-153, "INTAKE DOOR MOTOR : Removal and Installa-
tion".
NO >> Repair or replace malfunctioning part.
DTC Items
(CONSULT-III screen terms) DTC detection condition Possible cause
B263D FRE DOOR FAIL When the malfunctioning intake door
position is detected at FRE position Intake door motor
(PBR internal circuit is open or short-
ed)
 Intake door motor control linkage in-
stallation condition
 A/C auto amp.
 Harness and connector (LIN communication line is open or
shorted)
B263E 20P FRE DOOR FAIL
When the malfunctioning intake door
position is detected at 20% FRE posi-
tion
B263F REC DOOR FAIL When the malfunctioning intake door
position is detected at REC position
+
−Output waveform
Intake door motor
Connector Terminal
M254 3 Ground
SJIA1453J
Revision: 2010 May2011 QX56

B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR
HAC-97
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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HAC
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B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR
DTC LogicINFOID:0000000006275931
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-97, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006275932
1.CHECK UPPER VENTILATOR DOOR MOTOR COMMUNICATION SIGNAL
1. Turn ignition switch ON.
2. Check output waveform between upper vent 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 UPPER VENTILATOR DOOR MOTOR
Check upper ventilator door motor is properly installed. Refer to HAC-152, "
Exploded View".
Is the inspection result normal?
YES >> Replace upper ventilator door motor. Refer to HAC-154, "UPPER VENTILATOR DOOR MOTOR :
Removal and Installation".
DTCItems
(CONSULT-III screen terms) DTC detection condition Possible cause
B2661
UPPER VENT DOOR MOT When the malfunctioning upper ventila-
tor door position is detected at OPEN
position
 Upper ventilator door motor
(PBR internal circuit is open or short-
ed)
 Upper ventilator door motor installation condition
 A/C auto amp.
 Harness and connector (LIN communication line is open or
shorted)
B2662
When the malfunctioning upper ventila-
tor door position is detected at middle
position
B2663 When the malfunctioning upper ventila-
tor door position is detected at shut po-
sition
+
−Output waveform
Upper vent door motor
Connector Terminal
M256 3 Ground
SJIA1453J
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

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

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