Nissan Quest E52. Manual - part 774

HAC-226

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

REAR BLOWER MOTOR

NOTE:
Calculate drive signal duty ratio as shown in the figure.
T2 = Approx. 1.6 ms

Is the inspection result normal?

YES

>> Replace rear blower motor. Refer to 

VTL-18, "REAR BLOWER MOTOR : Removal and Installa-

tion"

.

NO

>> Replace front A/C control (A/C amp.). Refer to 

HAC-238, "Removal and Installation"

.

6.

CHECK REAR BLOWER MOTOR POWER SUPPLY CIRCUIT FOR OPEN

1.

Turn ignition switch OFF. 

2.

Disconnect rear blower relay connector. 

3.

Check continuity between rear blower relay harness connector and rear blower motor harness connector. 

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair harness or connector.

7.

CHECK REAR BLOWER RELAY GROUND CIRCUIT FOR OPEN

Check continuity between rear blower relay harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair harness or connector. 

8.

CHECK REAR BLOWER RELAY

Check rear blower relay. Refer to 

HAC-227, "Component Inspection (Rear Blower Relay)"

.

Is the inspection result normal?

YES

>> Check rear blower relay power supply circuit. Refer to 

PG-11, "Wiring Diagram - BATTERY

POWER SUPPLY -"

 and 

PG-54, "Wiring Diagram - IGNITION POWER SUPPLY -"

.

NO

>> Replace rear blower relay.

Component Inspection (Rear Blower Motor)

INFOID:0000000009652666

1.

CHECK REAR BLOWER MOTOR-I

Rear blower motor

Condition

Duty ratio

(Approx.)

Connector

Terminal

Fan speed

VENT mode

B403

2

1st

25 %

2nd

33 %

3rd

41 %

4th

51 %

5th

61 %

6th

69 %

7th

81 %

JPLIA1210GB

Rear blower relay

Rear blower motor

Continuity

Connector

Terminal

Connector

Terminal

M14

5

B403

3

Existed

7

Rear blower relay

—

Continuity

Connector

Terminal

M14

2

Ground

Existed

REAR BLOWER MOTOR

HAC-227

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

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1.

Remove rear blower motor. Refer to 

VTL-18, "REAR BLOWER MOTOR : Removal and Installation"

.

2.

Check that there is not any mixing foreign object in the rear blower motor. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace rear blower motor. Refer to 

VTL-18, "REAR BLOWER MOTOR : Removal and Installa-

tion"

.

2.

CHECK REAR BLOWER MOTOR-II

Check that there is not breakage or damage in the rear blower motor. 
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace rear blower motor. Refer to 

VTL-18, "REAR BLOWER MOTOR : Removal and Installa-

tion"

.

3.

CHECK REAR BLOWER MOTOR-III

Check that rear blower motor turns smoothly. 
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace rear blower motor. Refer to 

VTL-18, "REAR BLOWER MOTOR : Removal and Installa-

tion"

.

Component Inspection (Rear Blower Relay)

INFOID:0000000009652667

1.

CHECK REAR BLOWER RELAY

1.

Remove rear blower relay. Refer to 

PG-81, "Fuse and Fusible Link Arrangement"

.

2.

Check continuity between rear blower relay terminal 3 and 5,
then 6 and 7 when voltage is supplied between terminal 1 and 2. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace rear blower relay.

Terminal

Voltage

Continuity

3

5

ON

Existed

OFF

Not existed

6

7

ON

Existed

OFF

Not existed

JMIIA1869ZZ

HAC-228

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

MAGNET CLUTCH

MAGNET CLUTCH

Component Function Check

INFOID:0000000009652668

1.

CHECK MAGNET CLUTCH OPERATION

Perform auto active test of IPDM E/R. Refer to 

PCS-11, "Diagnosis Description"

. 

Does it operate normally?

YES

>> INSPECTION END

NO

>> Refer to 

HAC-228, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009652669

1.

CHECK MAGNET CLUTCH

1.

Turn ignition switch OFF. 

2.

Disconnect compressor connector. 

3.

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

Does it operate normally?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK FUSE

Check 10A fuse (No. 49, located in IPDM E/R). 
NOTE:
Refer to 

PG-82, "Fuse, Connector and Terminal Arrangement"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown. 

3.

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. 

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-36, "Removal and Installation"

.

NO

>> Repair harness or connector.

4.

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-32, "MAGNET CLUTCH : Removal and Installation of Com-

pressor Clutch"

.

NO

>> Repair harness or connector. 

IPDM E/R

Compressor

Continuity

Connector

Terminal

Connector

Terminal

F12

48

F18

1

Existed

Compressor

—

Continuity

Connector

Terminal

F18

2

Ground

Existed

FRONT MANUAL AIR CONDITIONING SYSTEM

HAC-229

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONING]

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SYMPTOM DIAGNOSIS

FRONT MANUAL AIR CONDITIONING SYSTEM

Symptom Table

INFOID:0000000009652670

NOTE:
Perform self-diagnoses with on board diagnosis and CONSULT before performing the symptom diagnosis. If
any malfunction result or DTC is detected, perform the corresponding diagnosis.

Symptom

Corresponding malfunction part

Check item/Reference

• Front air conditioning does not activate.
• Front air conditioning cannot be controlled.
• Operation status of air conditioning is not indicated on 

display.

• A/C amp. ignition power supply cir-

cuit

• Front A/C control (A/C amp.)

HAC-199, "A/C AMP. : Diagno-
sis Procedure"

Memory function does not operate normally.

• A/C amp. battery power supply cir-

cuit

• Front A/C control (A/C amp.)

HAC-199, "A/C AMP. : Diagno-
sis Procedure"

Discharge air temperature does not change.

• Front air mix door motor power sup-

ply circuit.

• Front air mix door motor LAN signal 

circuit.

• Front air mix door motor system in-

stallation condition

• Front air mix door motor
• Front A/C control (A/C amp.)

HAC-205, "Diagnosis Proce-
dure"

 

Air outlet does not change.

• Front mode door motor power sup-

ply circuit.

• Front mode door motor LAN signal 

circuit.

• Front mode door motor system in-

stallation condition

• Front mode door motor
• Front A/C control (A/C amp.)

HAC-207, "Diagnosis Proce-
dure"

 

Air inlet does not change.

• Intake door motor power supply cir-

cuit.

• Intake door motor LAN signal circuit.
• Intake door motor system installa-

tion condition

• Intake door motor
• Front A/C control (A/C amp.)

HAC-209, "Diagnosis Proce-
dure"

 

All door motor does not operate.

• Each door motor power supply cir-

cuit.

• Each door motor LAN signal circuit.
• Front A/C control (A/C amp.)

HAC-215, "Diagnosis Proce-
dure"

 

Front blower motor does not operate.

• Front blower motor power supply cir-

cuit.

• Front blower motor control signal cir-

cuit

• Front blower motor
• Front A/C control (A/C amp.)

HAC-222, "Diagnosis Proce-
dure"