Nissan Murano. Manual - 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 

PG-91, "Fuse, Con-

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-

PLY -"

.

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

Refer to 

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 

VTL-97, "Exploded View"

. 

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 

HAC-

170, "DTC Logic"

 or 

HAC-171, "DTC Logic"

. 

Is any DTC No. displayed?

YES

>> Perform the diagnosis that is applicable to the sensor and actuator. Refer to 

HAC-230, "DTC

Index"

. 

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 

HAC-166, "CONSULT Function"

. 

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 

EC-465, "Diagnosis Procedure"

.

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