Nissan Murano. Instruction — part 856
HAC-198
< DTC/CIRCUIT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
BLOWER MOTOR
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-91, "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
nector 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-47, "Wiring Diagram - IGNITION POWER SUP-
8.
CHECK BLOWER RELAY
1.
Turn the ignition switch OFF.
2.
Install the blower relay. Refer to
PG-91, "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
BLOWER MOTOR
HAC-199
< DTC/CIRCUIT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
PG-91, "Fuse, Connector and Terminal Arrangement"
for fuse location.
Is the inspection result normal?
YES
>> Repair the harnesses or connectors.
NO
>> Replace the fuse after repairing the applicable circuit.
Component Inspection
INFOID:0000000009722196
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.
HAC-200
< DTC/CIRCUIT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
MAGNET CLUTCH
MAGNET CLUTCH
Description
INFOID:0000000009722197
The magnet clutch drives the compressor, by an IPDM E/R signal.
Component Function Check
INFOID:0000000009722198
1.
FUNCTION INSPECTION
1.
Press AUTO switch.
2.
“AUTO” is indicated on the display.
3.
Press the A/C switch.
4.
Check that the indicator of the A/C switch turns on. Check visually and by sound that the compressor is
operating (the discharge air temperature or fan speed varies depending on the ambient temperature, in-
vehicle temperature, and temperature setting).
5.
Press the A/C switch again.
6.
Check that the indicator of the A/C switch turns OFF. Check visually and by sound that the compressor
stops.
Does it operate normally?
YES
>> INSPECTION END
NO
>> Perform trouble diagnosis for the compressor. Refer to
HAC-200, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000009722199
1.
INSPECTION IN AUTO ACTIVE TEST MODE
Perform “AUTO ACTIVE TEST”. Refer to
PCS-10, "Diagnosis Description"
.
Does it operate normally?
YES
>> GO TO 6.
NO
>> GO TO 2.
2.
CHECK MAGNET CLUTCH POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect compressor connector.
3.
Perform auto active test of IPDM E/R. Refer to
PCS-10, "Diagnosis Description"
.
4.
When auto active test operation sequence is compressor (magnet clutch) operation, check voltage
between compressor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 3.
3.
CHECK FUSE
Check 10 A fuse (No. 49, located in IPDM E/R).
NOTE:
Refer to
PG-93, "Fuse, Connector and Terminal Arrangement"
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
4.
CHECK MAGNET CLUTCH POWER SUPPLY CIRCUIT FOR OPEN
1.
Disconnect IPDM E/R connector.
2.
Check continuity between IPDM E/R harness connector and compressor harness connector.
+
−
Voltage
Compressor
Connector
Terminal
F18
1
Ground
0 V
⇔
Battery voltage
MAGNET CLUTCH
HAC-201
< DTC/CIRCUIT DIAGNOSIS >
[WITH 7 INCH DISPLAY]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-37, "Removal and Installation"
.
NO
>> Repair harness or connector.
5.
CHECK MAGNET CLUTCH GROUND CIRCUIT FOR OPEN
Check continuity between compressor harness connector and ground.
Is the inspection result normal?
YES
>> Replace magnet clutch. Refer to
HA-38, "MAGNET CLUTCH : Removal and Installation"
.
NO
>> Repair harness or connector.
6.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT
1.
Using CONSULT, 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 7.
7.
CHECK A/C AUTO AMP. INPUT SIGNAL
Using CONSULT, check “On/Off” of “COMP REQ SIG” and “FAN REQ SIG” in “DATA MONITOR” of HVAC.
Refer to
.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace A/C auto amp.
8.
CHECK REFRIGERANT PRESSURE SENSOR
Check refrigerant pressure sensor. Refer to
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace malfunctioning parts.
IPDM E/R
Compressor
Continuity
Connector
Terminal
Connector
Terminal
F12
48
F18
1
Existed
Compressor
—
Continuity
Connector
Terminal
F18
2
Ground
Existed
A/C SWITCH ON
: COMP REQ SIG On
A/C SWITCH OFF
: COMP REQ SIG Off
FAN CONTROL DIAL ON
: FAN REQ SIG On
FAN CONTROL DIAL OFF
: FAN REQ SIG Off
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