Nissan Quest E52. Instruction — part 776
HAC-234
< SYMPTOM DIAGNOSIS >
[MANUAL AIR CONDITIONING]
INSUFFICIENT HEATING
INSUFFICIENT HEATING
FRONT MANUAL AIR CONDITIONING SYSTEM
FRONT MANUAL AIR CONDITIONING SYSTEM : Description
INFOID:0000000009652676
Symptom
• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)
FRONT MANUAL AIR CONDITIONING SYSTEM : Diagnosis Procedure
INFOID:0000000009652677
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 COOLING SYSTEM
1.
Check engine coolant level and check for leakage. Refer to
2.
Check radiator cap. Refer to the
CO-12, "RADIATOR CAP : Inspection"
.
3.
Check water flow sounds of the engine coolant. Refer to
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Refill engine coolant and repair or replace the parts depending on the inspection results.
2.
CHECK FRONT HEATER HOSE
Check installation of front heater hose by visually or touching.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace parts depending on the inspection results.
3.
CHECK FRONT HEATER CORE
1.
Check temperature of inlet hose and outlet hose of front heater core.
2.
Check that inlet side of front heater core is hot and the outlet side is slightly lower than/almost equal to the
inlet side.
CAUTION:
Always perform the temperature inspection in a short period of time because the engine coolant
temperature is very hot.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace front heater core. Refer to
HA-54, "HEATER CORE : Removal and Installation"
4.
CHECK AIR LEAKAGE FROM EACH DUCT
Check duct and nozzle, etc. of the front air conditioning for air 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:0000000009652678
Symptom
• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)
REAR MANUAL AIR CONDITIONING SYSTEM : Diagnosis Procedure
INFOID:0000000009652679
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 HEATING
HAC-235
< SYMPTOM DIAGNOSIS >
[MANUAL AIR CONDITIONING]
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1.
CHECK REAR HEATER HOSE
Check installation of rear heater hose by visually or touching.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace parts depending on the inspection results.
2.
CHECK REAR HEATER CORE
1.
Check temperature of inlet hose and outlet hose of rear heater core.
2.
Check that inlet side of rear heater core is hot and the outlet side is slightly lower than/almost equal to the
inlet side.
CAUTION:
Always perform the temperature inspection in a short period of time because the engine coolant
temperature is very hot.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace rear heater core. Refer to
HA-59, "HEATER CORE : Removal and Installation"
.
3.
CHECK AIR LEAKAGE FROM EACH DUCT
Check duct and nozzle, etc. of the rear air conditioning for air leakage.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace parts depending on the inspection results.
HAC-236
< SYMPTOM DIAGNOSIS >
[MANUAL AIR CONDITIONING]
COMPRESSOR DOES NOT OPERATE
COMPRESSOR DOES NOT OPERATE
Description
INFOID:0000000009652680
SYMPTOM
Compressor does not operate.
Diagnosis Procedure
INFOID:0000000009652681
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.
• Check that refrigerant is enclosed in cooler cycle normally. If refrigerant amount is shortage from proper
amount, perform the inspection of refrigerant leakage.
1.
CHECK MAGNET CLUTCH OPERATION
Check magnet clutch. Refer to
HAC-228, "Component Function Check"
Does it operate normally?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning parts.
2.
CHECK REFRIGERANT PRESSURE SENSOR
Check refrigerant pressure sensor. Refer to
EC-442, "Component Function Check"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning parts.
3.
CHECK A/C ON SIGNAL
Check A/C ON signal. Refer to
HAC-218, "Component Function Check"
Is inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace malfunctioning parts.
4.
CHECK BLOWER FAN ON SIGNAL
Check blower fan ON signal. Refer to
HAC-220, "Component Function Check"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace malfunctioning parts
5.
CHECK INTAKE SENSOR CIRCUIT
Check intake sensor circuit. Refer to
HAC-203, "Diagnosis Procedure"
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace malfunctioning parts
6.
CHECK BCM OUTPUT SIGNAL
With CONSULT
1.
Select “DATA MONITOR” mode of “ECM” using CONSULT.
2.
Select “AIR COND SIG” and “HEATER FAN SW”, and check status under the following conditions.
Is the inspection result normal?
Monitor item
Condition
Status
AIR COND SIG
A/C switch
OFF (A/C indicator: OFF)
Off
ON (A/C indicator: ON)
On
HEATER FAN SW
Blower motor
OFF
Off
ON
On
COMPRESSOR DOES NOT OPERATE
HAC-237
< SYMPTOM DIAGNOSIS >
[MANUAL AIR CONDITIONING]
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YES
>> Replace IPDM E/R. Refer to
PCS-36, "Removal and Installation"
.
NO
>> Replace BCM. Refer to
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