Nissan Murano Z51. Manual - part 885

MAGNET CLUTCH

HAC-195

< DTC/CIRCUIT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

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MAGNET CLUTCH

Description

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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-195, "Diagnosis Procedure"

. 

Diagnosis Procedure

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1.

INSPECTION IN AUTO ACTIVE TEST MODE

Perform “AUTO ACTIVE TEST”.  Refer to 

PCS-10, "Diagnosis Description"

. 

Does it operate normally?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK MAGNET CLUTCH

1.

Turn the ignition switch OFF.

2.

Disconnect the magnet clutch connector. 

3.

Directly apply the battery voltage to the magnet clutch. Check for operation visually and by sound. 

Does it operate normally?

YES

>> GO TO 3.

NO

>> Replace the compressor.

3.

CHECK MAGNET CLUTCH CIRCUIT CONTINUITY

1.

Turn the ignition switch OFF.

2.

Disconnect IPDM E/R connector.

3.

Check continuity between magnet clutch harness connector and IPDM E/R harness connector. 

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK FUSE

Check 10A fuse (No. 49). 
NOTE:
Refer to 

PG-115, "Fuse, Connector and Terminal Arrangement"

 for fuse location. 

Is the inspection result normal?

YES

>> Replace IPDM E/R.

IPDM E/R

Compressor

Continuity

Connector

Terminal

Connector

Terminal

F12

48

F18

1

Existed

HAC-196

< DTC/CIRCUIT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

MAGNET CLUTCH

NO

>> Replace the fuse after repairing the applicable circuit. 

5.

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 

HAC-

165, "DTC Logic"

 or 

HAC-166, "DTC Logic"

. 

Is any DTC No. displayed?

YES

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

HAC-226, "DTC

Index"

. 

NO

>> GO TO 6.

6.

CHECK A/C AUTO AMP. INPUT SIGNAL

Using CONSULT-III, check “On/Off” of “COMP REQ SIG” and “FAN REQ SIG” in “DATA MONITOR” of HVAC.
Refer to 

HAC-161, "CONSULT-III Function"

. 

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace A/C auto amp.

7.

CHECK REFRIGERANT PRESSURE SENSOR

Check refrigerant pressure sensor. Refer to 

EC-457, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace malfunctioning parts.

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

POWER SUPPLY AND GROUND CIRCUIT

HAC-197

< DTC/CIRCUIT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

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POWER SUPPLY AND GROUND CIRCUIT

A/C AUTO AMP.

A/C AUTO AMP. : Description

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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 dial are oper-
ated, data is input to the A/C auto amp. from the AV control unit
using CAN communication.
The A/C auto amp. is operated with control mechanisms. Signals
from various switches and Potentio Temperature Control (PTC) are
directly entered into the A/C auto amp.

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

A/C AUTO AMP. : Component Function Check

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1.

CHECK OPERATION

1.

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

2.

Operate the temperature control dial (driver side). Check that the fan speed or outlet changes.  (The dis-
charge 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-197, "A/C AUTO AMP. : Diagnosis

Procedure"

.  

A/C AUTO AMP. : Diagnosis Procedure

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1.

INSPECTION BY FAIL-SAFE FUNCTION

1.

Turn the ignition switch ON.

2.

After approximately 30 seconds, check that the air conditioner is operated by the fail-safe function (the
operation display of air conditioner is not performed). Refer to 

HAC-225, "Fail-Safe"

. 

Is the fail-safe function operated? 

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

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

HAC-198

< DTC/CIRCUIT DIAGNOSIS >

[WITH 7 INCH DISPLAY]

POWER SUPPLY AND GROUND CIRCUIT

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK FUSE

Check 10A fuses [Nos. 3, 6 and 19, located in the fuse block (J/B)].
NOTE:
Refer to 

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. 

4.

CHECK A/C AUTO AMP. CIRCUIT CONTINUITY

1.

Turn ignition switch OFF.

2.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair the harnesses or connectors.

5.

CHECK PRESET SWITCH

Check the preset switch.  Refer to 

AV-520, "Symptom Table"

 (bose audio without navigation) or 

AV-773,

"Symptom Table"

 (bose audio with navigation). 

Is the inspection result normal?

YES

>> Replace the A/C auto amp. 

NO

>> Repair or replace parts according to the inspection results.

(+)

(

−

)

Voltage

A/C auto amp.

—

Ignition switch position

Connector

Terminal

OFF

ACC

ON

M50

17

Ground

Approx. 0 V

Battery voltage

Battery voltage

20

Approx. 0 V

Approx. 0 V

Battery voltage

40

Battery voltage

Battery voltage

Battery voltage

A/C auto amp.

—

Continuity

Connector

Terminal

M50

19

Ground

Existed

39