Nissan Murano Z51. Manual — part 884
BLOWER MOTOR
HAC-191
< DTC/CIRCUIT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
BLOWER MOTOR
Description
INFOID:0000000005514737
COMPONENT DESCRIPTION
Brush-less Motor
The blower motor utilizes a brush-less motor with a rotating magnet.
Quietness is improved over previous motors where the brush was
the point of contact and the coil rotated.
Blower Motor Circuit
Component Function Check
INFOID:0000000005514738
1.
CHECK OPERATION
1.
Warm up the engine.
2.
Operate the fan control dial. Check that the fan speed and indicator are switched for all fan speeds.
Does it operate normally?
YES
>> INSPECTION END
NO
>> Perform trouble diagnosis for the blower motor. Refer to
HAC-191, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000005514739
1.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1.
Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2.
Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
Is any DTC No. displayed?
YES
>> Perform the diagnosis that is applicable to the sensor and actuator. Refer to
.
NO
>> GO TO 2.
2.
CHECK WITH ACTIVE TEST OF CONSULT-III
1.
Using CONSULT-III, perform “HVAC TEST” “ACTIVE TEST” of HVAC to check each output device. Refer
to
HAC-161, "CONSULT-III Function"
NOTE:
Perform the ACTIVE TEST after starting the engine because the compressor is operated.
ZHA152H
JSIIA0999ZZ
HAC-192
< DTC/CIRCUIT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
BLOWER MOTOR
2.
Check that the blower motor control signal changes according to each indicator signal.
NOTE:
Perform the inspection of each output device after starting the engine because the compressor is operated.
Does it operate normally?
YES
>> INSPECTION END
NO
>> GO TO 3.
3.
CHECK POWER SUPPLY FOR BLOWER MOTOR
1.
Disconnect blower motor connector.
2.
Turn ignition switch ON.
3.
Check voltage between blower motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 7.
4.
CHECK BLOWER MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check continuity between blower motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair harness or connector.
5.
CHECK BLOWER MOTOR CIRCUIT CONTINUITY
1.
Disconnect A/C auto amp. connector.
2.
Check continuity between blower motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 6.
Test item
MODE 1
MODE 2
MODE 3
MODE 4
MODE 5
MODE 6
MODE 7
Mode door position
VENT1
VENT2
B/L1
B/L2
FOOT
D/F
DEF
Intake door position
REC
REC
20%FRE
20%FRE
FRE
FRE
FRE
Air mix door position
(driver & passenger
side)
FULL COLD
FULL HOT
FULL COLD
FULL HOT
FULL HOT
FULL HOT
FULL HOT
Blower motor duty ratio
35%
35%
61%
61%
81%
81%
35%
Compressor (Magnet
clutch)
ON
ON
ON
ON
OFF
OFF
ON
Upper ventilator door
OPEN
SHUT
OPEN
SHUT
SHUT
SHUT
SHUT
(+)
(
−
)
Voltage
Blower motor
—
Connector
Terminal
M98
1
Ground
Battery voltage
Blower motor
—
Continuity
Connector
Terminal
M98
3
Ground
Existed
Blower motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M98
2
M50
32
Existed
BLOWER MOTOR
HAC-193
< DTC/CIRCUIT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
NO
>> Repair harness or connector.
6.
CHECK A/C AUTO AMP. OUTPUT SIGNAL
1.
Reconnect blower motor connector and A/C auto amp. connector.
2.
Turn ignition switch ON.
3.
Set MODE switch to the VENT position.
4.
Check the output waveform between blower motor harness connector and ground using an oscilloscope,
while varying the fan speed from 1 to 7.
Is the inspection result normal?
YES
>> Replace the blower motor.
NO
>> Replace the A/C auto amp.
7.
CHECK POWER VOLTAGE OF BLOWER RELAY
1.
Turn the ignition switch OFF.
2.
Remove the blower relay. Refer to
PG-113, "Fuse, Connector and Terminal Arrangement"
3.
Turn the ignition switch ON.
4.
Check the voltage between blower relay fuse block side terminal and ground. Refer to
Connector and Terminal Arrangement"
for relay terminal assignment.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Inspection the power supply circuit. Refer to
PG-67, "Wiring Diagram - IGNITION POWER SUP-
8.
CHECK BLOWER RELAY
1.
Turn the ignition switch OFF.
2.
Install the blower relay. Refer to
PG-113, "Fuse, Connector and Terminal Arrangement"
3.
Turn the ignition switch ON.
4.
Check the operating sound of blower relay.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace the blower relay.
9.
CHECK FUSE
Check 15A fuses (Nos. 21 and 22).
NOTE:
JPIIA0616GB
(+)
(
−
)
Voltage
Blower relay
—
1
Ground
Battery voltage
3
HAC-194
< DTC/CIRCUIT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
BLOWER MOTOR
PG-113, "Fuse, Connector and Terminal Arrangement"
Is the inspection result normal?
YES
>> Repair the harnesses or connectors.
NO
>> Replace the fuse after repairing the applicable circuit.
Component Inspection
INFOID:0000000005514740
1.
CHECK BLOWER MOTOR
1.
Remove the blower motor. Refer to
.
2.
Check that the blower motor rotates smoothly.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace blower motor.
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