Nissan Quest E52. Instruction — part 773
HAC-222
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
FRONT BLOWER MOTOR
FRONT BLOWER MOTOR
Diagnosis Procedure
INFOID:0000000009652662
1.
CHECK FUSE
1.
Turn ignition switch OFF.
2.
Check 15A fuse [No. 21 and 22, located in fuse block (J/B)].
NOTE:
Refer to
PG-80, "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 FRONT BLOWER MOTOR POWER SUPPLY
1.
Disconnect front blower motor connector.
2.
Turn ignition switch ON.
3.
Check voltage between front blower motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 6.
3.
CHECK FRONT BLOWER MOTOR GROUND CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Check continuity between front blower motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK FRONT BLOWER MOTOR CONTROL SIGNAL CIRCUIT FOR OPEN
1.
Disconnect A/C amp. connector.
2.
Check continuity between front blower motor harness connector and A/C amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair harness or connector.
5.
CHECK FRONT BLOWER MOTOR CONTROL SIGNAL
1.
Reconnect front blower motor connector and A/C amp. connector.
2.
Turn ignition switch ON.
3.
Operate MODE switch (front A/C control) to set air outlet of front air conditioning to VENT.
4.
Change front fan speed from Lo to Hi, and check duty ratios between front blower motor harness connec-
tor and ground by using an oscilloscope.
+
−
Voltage
Front blower motor
Connector
Terminal
M140
3
Ground
11 – 14 V
Front blower motor
—
Continuity
Connector
Terminal
M140
1
Ground
Existed
Front blower motor
A/C amp.
Continuity
Connector
Terminal
Connector
Terminal
M140
2
M49
10
Existed
FRONT BLOWER MOTOR
HAC-223
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
NOTE:
Calculate drive signal duty ratio as shown in the figure.
T2 = Approx. 1.6 ms
Is the inspection result normal?
YES
>> Replace front blower motor. Refer to
VTL-18, "FRONT BLOWER MOTOR : Removal and Installa-
.
NO
>> Replace front A/C control (A/C amp.). Refer to
HAC-238, "Removal and Installation"
6.
CHECK FRONT BLOWER MOTOR POWER SUPPLY CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Disconnect fuse block (J/B) connector.
3.
Check continuity between fuse block (J/B) harness connector and front blower motor harness connector.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair harness or connector.
7.
CHECK FRONT BLOWER RELAY GROUND CIRCUIT FOR OPEN
Check continuity between fuse block (J/B) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair harness or connector.
8.
CHECK FRONT BLOWER RELAY
Check front blower relay. Refer to
HAC-224, "Component Inspection (Front Blower Relay)"
.
Is the inspection result normal?
YES
>> Check front blower relay power supply circuit. Refer to
PG-11, "Wiring Diagram - BATTERY
PG-54, "Wiring Diagram - IGNITION POWER SUPPLY -"
.
NO
>> Replace front blower relay.
Component Inspection (Front Blower Motor)
INFOID:0000000009652663
1.
CHECK FRONT BLOWER MOTOR-I
Front blower motor
Condition
Duty ratio
(Approx.)
Connector
Terminal
Fan speed
VENT mode
M140
2
1st
25 %
2nd
33 %
3rd
41 %
4th
51 %
5th
61 %
6th
69 %
7th
81 %
JPLIA1210GB
Fuse block (J/B)
Front blower motor
Continuity
Connector
Terminal
Connector
Terminal
M1
3A
M140
3
Existed
8A
Fuse block (J/B)
—
Continuity
Connector
Terminal
M3
7C
Ground
Existed
HAC-224
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
FRONT BLOWER MOTOR
1.
Remove front blower motor. Refer to
VTL-18, "FRONT BLOWER MOTOR : Removal and Installation"
2.
Check that there is not any mixing foreign object in the front blower motor.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace front blower motor. Refer to
VTL-18, "FRONT BLOWER MOTOR : Removal and Installa-
.
2.
CHECK FRONT BLOWER MOTOR-II
Check that there is not breakage or damage in the front blower motor.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace front blower motor. Refer to
VTL-18, "FRONT BLOWER MOTOR : Removal and Installa-
.
3.
CHECK FRONT BLOWER MOTOR-III
Check that front blower motor turns smoothly.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace front blower motor. Refer to
VTL-18, "FRONT BLOWER MOTOR : Removal and Installa-
.
Component Inspection (Front Blower Relay)
INFOID:0000000009652664
1.
CHECK FRONT BLOWER RELAY
1.
Remove front blower relay. Refer to
PG-80, "Fuse, Connector and Terminal Arrangement"
2.
Check continuity between front blower relay terminal 3 and 5
when voltage is supplied between terminal 1 and 2.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace front blower relay.
Terminal
Voltage
Continuity
3
5
ON
Existed
OFF
Not existed
JSIIA1551ZZ
REAR BLOWER MOTOR
HAC-225
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
REAR BLOWER MOTOR
Diagnosis Procedure
INFOID:0000000009652665
1.
CHECK FUSE
1.
Turn ignition switch OFF.
2.
Check 15A fuse (No. 23 and 24).
NOTE:
Refer to
PG-81, "Fuse and Fusible Link 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 REAR BLOWER MOTOR POWER SUPPLY
1.
Disconnect rear blower motor connector.
2.
Turn ignition switch ON.
3.
Check voltage between rear blower motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 6.
3.
CHECK REAR BLOWER MOTOR GROUND CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Check continuity between rear blower motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK REAR BLOWER MOTOR CONTROL SIGNAL CIRCUIT FOR OPEN
1.
Disconnect A/C amp. connector.
2.
Check continuity between rear blower motor harness connector and A/C amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair harness or connector.
5.
CHECK REAR BLOWER MOTOR CONTROL SIGNAL
1.
Reconnect rear blower motor connector and A/C amp. connector.
2.
Turn ignition switch ON.
3.
Operate MODE switch (front A/C control) to set air outlet of rear air conditioning to VENT.
4.
Change rear fan speed from Lo to Hi, and check duty ratios between rear blower motor harness connector
and ground by using an oscilloscope.
+
−
Voltage
Rear blower motor
Connector
Terminal
B403
3
Ground
11 – 14 V
Rear blower motor
—
Continuity
Connector
Terminal
B403
1
Ground
Existed
Rear blower motor
A/C amp.
Continuity
Connector
Terminal
Connector
Terminal
B403
2
M49
30
Existed
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