Nissan Murano. Manual - part 825

HAC-74

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

MAGNET CLUTCH

MAGNET CLUTCH

Description

INFOID:0000000009722092

The magnet clutch drives the compressor, by an IPDM E/R signal.

Component Function Check

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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-74, "Diagnosis Procedure"

. 

Diagnosis Procedure

INFOID:0000000009722094

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-75

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

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HAC

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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-

44, "DTC Logic"

 or 

HAC-45, "DTC Logic"

. 

Is any DTC No. displayed?

YES

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

HAC-106, "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-40, "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

HAC-76

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

A/C CONTROL SIGNAL CIRCUIT

A/C CONTROL SIGNAL CIRCUIT

Diagnosis Procedure

INFOID:0000000009722095

1.

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-

44, "DTC Logic"

 or 

HAC-45, "DTC Logic"

. 

Is any DTC No. displayed?

YES

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

HAC-106, "DTC

Index"

. 

NO

>> GO TO 2.

2.

CHECK TX (A/C CONTROL 

→

 A/C AUTO AMP.) CIRCUIT CONTINUITY

1.

Disconnect the A/C control and the A/C auto amp. connector.

2.

Check continuity between A/C control harness connector and A/C auto amp. harness connector. 

3.

Check continuity between A/C control harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK RX (A/C AUTO AMP. 

→

 A/C CONTROL) CIRCUIT CONTINUITY

1.

Disconnect the A/C control and the A/C auto amp. connector.

2.

Check continuity between A/C control harness connector and A/C auto amp. harness connector. 

3.

Check continuity between A/C control harness connector and ground. 

Is the inspection result normal?

YES

>> Perform trouble diagnosis for the A/C control. Refer to 

HAC-78, "A/C CONTROL : Diagnosis Pro-

cedure"

. 

NO

>> Repair harness or connector.

A/C control

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M95

4

M50

7

 

Existed

A/C control

—

Continuity

Connector

Terminal

M95

4

Ground

 Not existed

A/C control

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M95

3

M50

6

 

Existed

A/C control

—

Continuity

Connector

Terminal

M95

3

Ground

 Not existed

POWER SUPPLY AND GROUND CIRCUIT

HAC-77

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

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POWER SUPPLY AND GROUND CIRCUIT

A/C AUTO AMP.

A/C AUTO AMP. : Description

INFOID:0000000009722096

COMPONENT DESCRIPTION

A/C Auto Amp. (Air Conditioner Automatic Amplifier)

The A/C auto amp. (1) has a built-in microcomputer that processes
information sent from various sensors needed for air conditioner
operation. The air mix door motor(s), the mode door motor, the
intake door motor, the upper ventilator door motor, the blower motor
and the compressor are then controlled.
When the various switches and temperature control switch are oper-
ated, data is input to the A/C auto amp. from the A/C control.

Power Supply and Ground Circuit for A/C Auto Amp.

A/C AUTO AMP. : Component Function Check

INFOID:0000000009722097

1.

CHECK OPERATION

1.

Press the AUTO switch, and then check that “AUTO” is shown on the display. 

2.

Operate the temperature control switch (driver side). Check that the fan speed or outlet changes. (The
discharge air temperature or fan speed varies depending on the ambient temperature, in-vehicle tempera-
ture, and temperature setting.) 

Does it operate normally?

YES

>> INSPECTION END

NO

>> Perform trouble diagnosis for the A/C system. Refer to 

HAC-77, "A/C AUTO AMP. : Diagnosis

Procedure"

.

A/C AUTO AMP. : Diagnosis Procedure

INFOID:0000000009722098

1.

CHECK A/C AUTO AMP. POWER SUPPLY CIRCUIT

1.

Disconnect the A/C auto amp. connector. 

2.

Check voltage between A/C auto amp. harness connector and ground. 

JPIIA0609ZZ

JPIIA0617GB