Infiniti QX56 (Z62). Manual — part 800
B2634, B2635 FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE)
HAC-91
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
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B2634, B2635 FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE)
DTC Logic
INFOID: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” mode of “HVAC” using CONSULT-III.
3.
Check DTC.
Is DTC detected?
YES
>> Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006275926
1.
CHECK FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE) COMMUNICATION SIGNAL
1.
Turn ignition switch ON.
2.
Check output waveform between front air mix 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
Is the inspection result normal?
YES
>> Replace front air mix door motor (passenger side). Refer to
HAC-153, "AIR MIX DOOR MOTOR :
.
DTC
Items
(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
HAC-92
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
B2634, B2635 FRONT AIR MIX DOOR MOTOR (PASSENGER SIDE)
NO
>> Repair or replace malfunctioning part.
3.
CHECK FRONT AIR MIX DOOR MOTOR (PASSENGER 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 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 RH
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M255
3
M50
16
Existed
B2636, B2637, B2638, B2639, B2654, B2655 FRONT MODE DOOR MOTOR
HAC-93
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
B2636, B2637, B2638, B2639, B2654, B2655 FRONT MODE DOOR MOTOR
DTC Logic
INFOID: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” mode of “HVAC” using CONSULT-III.
3.
Check DTC.
Is DTC detected?
YES
>> Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID: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 MODE DOOR MOTOR CONTROL LINKAGE
Check front mode door motor control linkage is properly installed. Refer to
.
DTC
Items
(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
HAC-94
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
B2636, B2637, B2638, B2639, B2654, B2655 FRONT MODE DOOR MOTOR
Is the inspection result normal?
YES
>> Replace front mode door motor. Refer to
HAC-153, "MODE DOOR MOTOR : Removal and Instal-
.
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 motor and A/C auto amp. connector.
3.
Check continuity between front mode door motor 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
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