Nissan Quest E52. Manual - part 775

HAC-230

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONING]

FRONT MANUAL AIR CONDITIONING SYSTEM

Compressor does not operate. 

• Magnet clutch
• The circuit between magnet clutch 

and IPDM E/R

• IPDM E/R (A/C relay)
• The circuit between ECM and refrig-

erant pressure sensor

• Refrigerant pressure sensor
• CAN communication line
• A/C ON signal circuit
• Blower fan ON signal circuit
• Intake sensor circuit
• Intake sensor
• Front A/C control (A/C amp.)

HAC-236, "Diagnosis Proce-
dure"

• Insufficient cooling
• No cool air comes out. (Air flow volume is normal.)

• Magnet clutch control system
• Drive belt slipping
• Cooler cycle
• Air leakage from each duct

HAC-232, "FRONT MANUAL 
AIR CONDITIONING SYSTEM : 
Diagnosis Procedure"

• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)

• Engine cooling system
• Front heater hose
• Front heater core
• Air leakage from each duct

HAC-234, "FRONT MANUAL 
AIR CONDITIONING SYSTEM : 
Diagnosis Procedure"

Noise is heard when the front 
air conditioning operates.

During compressor op-
eration

Cooler cycle 

HA-29, "Symptom Table"

During front blower mo-
tor operation

• Mixing any foreign object in front 

blower motor

• Front blower motor fan breakage
• Front blower motor rotation inferiori-

ty

HAC-223, "Component Inspec-
tion (Front Blower Motor)"

Symptom

Corresponding malfunction part

Check item/Reference

REAR MANUAL AIR CONDITIONING SYSTEM

HAC-231

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONING]

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REAR MANUAL AIR CONDITIONING SYSTEM

Symptom Table

INFOID:0000000009652671

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.

• The following table is based on the condition that front manual air conditioning system operates normally.

Symptom

Corresponding malfunction part

Check item/Reference

• Rear air conditioning cannot be controlled by front A/C 

control.

• Operation status of rear air conditioning is not indicated 

on front A/C control display.

Front A/C control (A/C amp.)

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

HAC-238, "Re-

moval and Installation"

.

Rear air conditioning cannot be 
controlled by rear A/C control.

Operation status of rear 
air conditioning is indi-
cated on rear A/C control 
display.

Communication signal (rear A/C con-
trol 

→

 A/C amp.)

Refer to 

HAC-201, "Diagnosis 

Procedure"

.

Operation status of rear 
air conditioning is not in-
dicated on rear A/C con-
trol display.

Communication signal (A/C amp. 

→

 

rear A/C control)

Refer to 

HAC-201, "Diagnosis 

Procedure"

.

Rear A/C control power supply circuit

Refer to 

HAC-200, "REAR A/C 

CONTROL : Diagnosis Proce-
dure"

.

Discharge air temperature does not change.

• Rear air mix door motor power sup-

ply circuit.

• Rear air mix door motor LAN signal 

circuit.

• Rear air mix door motor system in-

stallation condition

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

HAC-205, "Diagnosis Proce-
dure"

 

Air outlet does not change.

• Rear mode door motor power supply 

circuit.

• Rear mode door motor LAN signal 

circuit.

• Rear mode door motor system in-

stallation condition

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

HAC-213, "Diagnosis Proce-
dure"

 

Rear blower motor does not operate.

• Rear blower motor power supply cir-

cuit.

• Rear blower motor control signal cir-

cuit

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

HAC-225, "Diagnosis Proce-
dure"

 

• Insufficient cooling
• No cool air comes out. (Air flow volume is normal.)

• Cooler cycle
• Air leakage from each duct

HAC-232, "REAR MANUAL AIR 
CONDITIONING SYSTEM : Di-
agnosis Procedure"

• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)

• Rear heater hose
• Rear heater core
• Air leakage from each duct

HAC-234, "REAR MANUAL AIR 
CONDITIONING SYSTEM : Di-
agnosis Procedure"

Noise is heard when the rear blower motor operates.

• Mixing any foreign object in rear 

blower motor

• Rear blower motor fan breakage
• Rear blower motor rotation inferiority

HAC-226, "Component Inspec-
tion (Rear Blower Motor)"

HAC-232

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONING]

INSUFFICIENT COOLING

INSUFFICIENT COOLING

FRONT MANUAL AIR CONDITIONING SYSTEM

FRONT MANUAL AIR CONDITIONING SYSTEM : Description

INFOID:0000000009652672

Symptom

• Insufficient cooling
• No cool air comes out. (Air flow volume is normal.)

FRONT MANUAL AIR CONDITIONING SYSTEM : Diagnosis Procedure

INFOID:0000000009652673

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

1.

CHECK MAGNET CLUTCH OPERATION

1.

Turn ignition switch ON.

2.

Operate fan switch.

3.

Press A/C switch.

4.

Check that A/C indicator turns ON. Check visually and by sound that compressor operates.

5.

Press A/C switch again.

6.

Check that A/C indicator turns OFF. Check that compressor stops.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform diagnosis of “COMPRESSOR DOES NOT OPERATE” in “SYMPTOM DIAGNOSIS”.

Refer to 

HAC-236, "Diagnosis Procedure"

.

2.

CHECK DRIVE BELT

Check tension of drive belt. Refer to 

EM-14, "Checking"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Adjust or replace drive belt depending on the inspection results.

3.

CHECK REFRIGERANT CYCLE PRESSURE

Connect recovery/recycling recharging equipment to the vehicle and perform pressure inspection with gauge.
Refer to 

HA-27, "Symptom Table"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace parts depending on the inspection results.

4.

CHECK AIR LEAKAGE FROM EACH DUCT

Check duct and nozzle, etc. of the air conditioning system for leakage.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace parts depending on the inspection results.

REAR MANUAL AIR CONDITIONING SYSTEM

REAR MANUAL AIR CONDITIONING SYSTEM : Description

INFOID:0000000009652674

Symptom

• Insufficient cooling
• No cool air comes out. (Air flow volume is normal.)

REAR MANUAL AIR CONDITIONING SYSTEM : Diagnosis Procedure

INFOID:0000000009652675

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

INSUFFICIENT COOLING

HAC-233

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONING]

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1.

CHECK REFRIGERANT CYCLE PRESSURE

Connect recovery/recycling recharging equipment to the vehicle and perform pressure inspection with gauge.
Refer to 

HA-27, "Symptom Table"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace parts depending on the inspection results.

2.

CHECK AIR LEAKAGE FROM EACH DUCT

Check duct and nozzle, etc. of the air conditioning system for leakage.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace parts depending on the inspection results.