Nissan Altima L32. Manual - part 839

HAC-130

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

BLOWER MOTOR

NO

>> Repair harness or connector.

9.

CHECK FRONT BLOWER MOTOR RELAY GROUND

1. Press ignition switch OFF.

2. Disconnect fuse block (J/B) harness connector M5.

3. Check continuity between fuse block (J/B) harness connector

M5 terminal 7M and ground.

Is the inspection result normal?

YES

>> Replace front blower motor relay.

NO

>> Repair harness or connector.

Terminal

Continuity 

(+)

(-)

Connector - Terminal

Connector - Terminal

Yes

M5 - 7M

Ground

AWIIA0619ZZ

MAGNET CLUTCH

HAC-131

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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MAGNET CLUTCH

Component Function Check

INFOID:0000000004498278

INSPECTION FLOW

1.

 CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - MAGNET CLUTCH

1. Press ignition switch ON. 
2. Press vent switch (

). 

3. Press A/C switch. 

4. Confirm that the compressor clutch engages (sound or visual inspection). (Discharge air and blower

speed will depend on ambient, in-vehicle and set temperatures). 

Can a symptom be duplicated?

YES

>> GO TO 3.

 NO

>> GO TO 2.

2.

 PERFORM COMPLETE OPERATIONAL CHECK

Perform a complete operational check and check for any symptoms. Refer to 

HAC-102, "Operational Check"

.

Is the inspection result normal?

YES

>> Refer to 

HAC-155, "Symptom Matrix Chart"

.

NO

>> System OK. 

3.

 CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 4.

4.

 CHECK MAGNET CLUTCH MECHANISM

Check for magnet clutch operation.
Does the magnet clutch engage?

YES

>> GO TO 5

 NO

>> Check magnet clutch circuit. Refer to 

HAC-131, "Diagnosis Procedure"

.

5.

 CHECK AIR MIX DOOR MOTOR PBR CIRCUITS

Perform diagnostic procedure for the air mix door motor circuit. Refer to 

HAC-122, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair as necessary.

6.

 RECHECK FOR SYMPTOMS 

Perform a complete operational check and check for any symptoms. Refer to 

HAC-102, "Operational Check"

.

Does another symptom exist?

YES

>> Repair as necessary.

NO

>> Replace front air control. Refer to 

VTL-8, "Removal and Installation"

.

Diagnosis Procedure

INFOID:0000000004498279

DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH

HAC-132

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

MAGNET CLUTCH

SYMPTOM: Magnet clutch does not engage when A/C switch is ON.

1.

CHECK POWER SUPPLY FOR COMPRESSOR

1. Disconnect A/C compressor connector.

2. Start engine and press A/C switch.

3. Check voltage between compressor harness connector F3 ter-

minal 1 and ground. 

Is the inspection result normal?

YES

>>

Check magnet clutch coil.

1. If NG, replace magnet clutch. Refer to 

HA-35, "Removal and Installation for Compressor -

QR25DE Models"

 or 

HA-36, "Removal and Installation for Compressor - VQ35DE Models"

.

2. If OK, check compressor mounting points for looseness or corrosion and repair as necessary.

NO

>> GO TO 2.

2.

CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY IN IPDM E/R AND COMPRESSOR

1. Disconnect IPDM E/R connector F10.

2. Check continuity between A/C compressor harness connector

F3 (A) terminal 1 and IPDM E/R harness connector F10 (B) ter-

minal 48.

If OK, check harness for short to ground.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

AWIIA0046GB

Terminal

Voltage (V)

(Approx.)

(+)

(-)

Connector - Terminal

Body ground

12V

F3-1

AWIIA0621ZZ

Terminals

Continuity

Connector - Terminal

Connector - Terminal

Yes

F3 - 1

F10 - 48

AWIIA0622ZZ

MAGNET CLUTCH

HAC-133

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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3.

CHECK FUSE IN IPDM E/R

Check 10A fuse (No. 41 located in the IPDM E/R).
Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace fuse and check IPDM E/R for short circuit. Replace if necessary.

4.

CHECK COMPRESSOR ON SIGNAL

Check voltage between front air control connector M37 terminal 5

and ground, with A/C compressor ON and with A/C compressor

OFF.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> • When compressor is ON and voltage is not approx. 0V, Replace front air control. Refer to 

VTL-

8, "Removal and Installation"

.

• When compressor is OFF and voltage is not approx. 5V, BCM is malfunctioning. 

5.

CHECK CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL

1. Disconnect BCM connector M18 and front air control connector

M37.

2. Check continuity between BCM harness connector M18 (A) ter-

minal 33 and front air control connector M37 (B) terminal 5.

Is the inspection result normal? 

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL

Check voltage between ECM harness connector F13 terminal 39

and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> 1. Repair harness or connector.

2. Confirm that magnet clutch operation is normal.

7.

CHECK REFRIGERANT PRESSURE SENSOR

Refer to 

EC-975, "Diagnosis Procedure"

 (QR25DE) or 

EC-1503, "Diagnosis Procedure"

.(VQ35DE)

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace refrigerant pressure sensor. Refer to 

HA-44, "Removal and Installation for Refrigerant

Pressure Sensor"

Terminal

Voltage (V)

(Approx.)

(+)

(-)

Connector - Terminal

Body ground

Compressor ON: 0V

Compressor OFF: 5V

M37 - 5

AWIIA0623ZZ

Terminals

Continuity

Connector - Terminal

Connector - Terminal

Yes

M18 - 33

M37 - 5

AWIIA0624ZZ

Terminal

Voltage (V)

(Approx.)

(+)

(-)

Connector- Terminal

Body ground

12V

F13-39

AWIIA0625ZZ