Infiniti QX56 (Z62). Manual — part 802
B2664, B2665 REAR AIR MIX DOOR MOTOR
HAC-99
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
B2664, B2665 REAR AIR MIX DOOR MOTOR
DTC Logic
INFOID: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” mode of “HVAC” using CONSULT-III.
3.
Check DTC.
Is DTC detected?
YES
>> Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID: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
.
Is the inspection result normal?
YES
>> Replace rear air mix door motor. Refer to
HAC-154, "REAR AIR MIX DOOR MOTOR : Removal
.
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
HAC-100
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
B2664, B2665 REAR AIR MIX DOOR MOTOR
3.
CHECK REAR AIR MIX DOOR MOTOR COMMUNICATION SIGNAL CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect rear air mix door motor and A/C auto amp. connector.
3.
Check continuity between rear air mix 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.
Rear air mix door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
B210
3
M50
16
Existed
B2666, B2669, B266A REAR MODE DOOR MOTOR
HAC-101
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
B2666, B2669, B266A REAR MODE DOOR MOTOR
DTC Logic
INFOID: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” mode of “HVAC” using CONSULT-III.
3.
Check DTC.
Is DTC detected?
YES
>> Refer to
HAC-101, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006275936
1.
CHECK REAR MODE DOOR MOTOR 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 MODE DOOR MOTOR CONTROL LINKAGE
Check rear mode door motor control linkage is properly installed. Refer to
Is the inspection result normal?
YES
>> Replace rear mode door motor. Refer to
HAC-154, "REAR MODE DOOR MOTOR : Removal and
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
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 motor and A/C auto amp. connector.
3.
Check continuity between rear 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.
Rear mode door motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
B209
3
M50
16
Existed
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