Nissan X-Trail 32. Manual — part 1408
BLOWER MOTOR
HAC-107
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
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F
G
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A
B
HAC
N
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BLOWER MOTOR
Diagnosis Procedure
INFOID:0000000010939764
1.
CHECK FUSE
1.
Turn ignition switch OFF.
2.
Check following fuses.
-
15 A fuse [Nos. 17 and 27, located in fuse block (J/B)]
NOTE:
Refer to
PG-84, "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.
CHECKPOWER TRANSISTOR POWER SUPPLY
1.
Disconnect power transistor connector.
2.
Turn ignition switch ON.
3.
Check voltage between power transistor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK BLOWER RELAY
1.
Turn ignition switch OFF.
2.
Check blower relay. Refer to
HAC-110, "Component Inspection (Blower Relay)"
Is the inspection result normal?
YES
>> Repair harness or connector between power transistor and fuse.
NO
>> Replace blower relay.
4.
CHECK BLOWER MOTOR CONTROL CIRCUIT
1.
Turn ignition switch OFF.
2.
Connect power transistor connector.
3.
Disconnect blower motor connector.
4.
Turn ignition switch ON.
5.
Check voltage between blower motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK BLOWER MOTOR CONTROL CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Disconnect power transistor connector.
3.
Check continuity between power transistor harness connector and blower motor harness connector.
+
−
Voltage
Power transistor
Connector
Terminal
M349
4
Ground
Battery voltage
+
−
Voltage
Blower motor
Connector
Terminal
M347
1
Ground
Battery voltage
HAC-108
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
BLOWER MOTOR
Is the inspection result normal?
YES
>> Replace power transistor. Refer to
HAC-133, "Removal and Installation"
.
NO
>> Repair harness or connector.
6.
CHECK BLOWER MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect power transistor connector.
3.
Check continuity between power transistor harness connector and blower motor harness connector.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair harness or connector.
7.
CHECK POWER TRANSISTOR GROUND CIRCUIT
Check continuity between power transistor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair harness or connector.
8.
CHECK POWER TRANSISTOR CONTROL SIGNAL
1.
Connect power transistor connector and A/C auto amp. connector.
2.
Turn ignition switch ON.
3.
Set air outlet to VENT.
4.
Change fan speed from 1st – 7th, and check duty ratios between power transistor harness connector and
ground by using an oscilloscope.
NOTE:
Calculate the drive signal duty ratio as shown in the figure.
T2 = Approx. 2.5 ms
Is the inspection result normal?
Power transistor
Blower motor
Continuity
Connector
Terminal
Connector
Terminal
M350
5
M347
1
Existed
Power transistor
Blower motor
Continuity
Connector
Terminal
Connector
Terminal
M350
6
M347
2
Existed
Power transistor
—
Continuity
Connector
Terminal
M349
2
Ground
Existed
+
−
Condition
Duty ratio
(Approx.)
Voltage
Power transistor
Connector
Terminal
Fan speed (manual) Air
outlet: VENT
M349
1
Ground
1st
21%
2nd
24%
3rd
31%
4th
40%
5th
54%
6th
70%
7th
100%
JPIIA1646GB
BLOWER MOTOR
HAC-109
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
YES
>> GO TO 10.
NO
>> GO TO 9.
9.
CHECK POWER TRANSISTOR CONTROL SIGNAL CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Disconnect power transistor connector and A/C auto amp. connector.
3.
Check continuity between power transistor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-126, "Removal and Installation"
.
NO
>> Repair harness or connector.
10.
CHECK BLOWER MOTOR FEEDBACK SIGNAL
When fan speed is set to OFF, and check voltage between power transistor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> GO TO 11.
11.
CHECK BLOWER MOTOR FEEDBACK SIGNAL CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Disconnect power transistor connector and A/C auto amp. connector.
3.
Check continuity between power transistor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-126, "Removal and Installation"
.
NO
>> Repair harness or connector.
12.
REPLACE POWER TRANSISTOR
1.
Turn ignition switch OFF.
2.
Replace power transistor. Refer to
HAC-133, "Removal and Installation"
3.
Turn ignition switch ON.
4.
Change fan speed from 1st – 7th, and check that blower motor operates normally.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace blower motor. Refer to
VTL-15, "Removal and Installation"
.
Component Inspection (Blower Motor)
INFOID:0000000010939765
1.
CHECK BLOWER MOTOR-I
1.
Remove blower motor. Refer to
VTL-15, "Removal and Installation"
2.
Check that there is not any mixing foreign object in the blower motor.
Is the inspection result normal?
YES
>> GO TO 2.
Power transistor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M349
3
M173
27
Existed
+
−
Voltage
Power transistor
Connector
Terminal
M349
1
Ground
11 - 14 V
Power transistor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M349
1
M173
37
Existed
HAC-110
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
BLOWER MOTOR
NO
>> Replace blower motor. Refer to
VTL-15, "Removal and Installation"
.
2.
CHECK BLOWER MOTOR-II
Check that there is not breakage or damage in the blower motor.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace blower motor. Refer to
VTL-15, "Removal and Installation"
.
3.
CHECK BLOWER MOTOR-III
Check that blower motor turns smoothly.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace blower motor. Refer to
VTL-15, "Removal and Installation"
.
Component Inspection (Blower Relay)
INFOID:0000000010939766
1.
CHECK BLOWER RELAY
1.
Remove blower relay. Refer to
PG-84, "Fuse, Connector and Terminal Arrangement"
2.
Check continuity between blower relay terminal 3 and 5 when
the voltage is supplied between terminal 1 and 2.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace blower relay.
Terminal
Voltage
Continuity
3
5
ON
Existed
OFF
Not existed
JSIIA1551ZZ
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