Nissan March K13. Instruction — part 383
HAC-66
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
POWER SUPPLY AND GROUND CIRCUIT
2.
Disconnect the blower motor relay from the fuse block (J/B). Refer to
XX-XX, "*****"
.
3.
Turn the ignition switch ON.
4.
Check voltage between the ground and the connector on the fuse block side where blower motor relay
was installed. Refer to
XX-XX, "*****"
.
Is inspection result normal?
YES
>> GO TO 6.
NO
>> Repair the power supply circuit. Refer to
XX-XX, "*****"
.
6.
CHECK BLOWER MOTOR RELAY
Perform the blower motor component inspection. Refer to
HAC-58, "Component Inspection"
.
Is inspection result normal?
YES
>> Repair the harness or connector between blower motor relay and A/C auto amp.
NO
>> Replace blower motor relay.
(+)
(
−
)
Voltage
(Approx.)
Fuse block (J/B)
—
1
Ground
Battery voltage
3
A/C AUTO AMP.
HAC-67
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
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A/C AUTO AMP.
Component Function Check
INFOID:0000000006024059
1.
CHECK OPERATION
1.
Confirm that “AUTO” is indicated on the display by operating the AUTO switch.
2.
Operate the temperature control switch. Check that the fan speed or discharge air changes (the discharge
air temperature or fan speed varies depending on the ambient temperature, in-vehicle temperature, and
set temperature).
Does it operate normally?
YES
>> INSPECTION END
NO
>> Perform the diagnosis for the A/C auto amp. Refer to
Diagnosis Procedure
INFOID:0000000006024060
1.
CHECK A/C AUTO AMP. POWER SUPPLY CIRCUIT AND GROUND CIRCUIT
Check A/C auto amp. power supply circuit and ground circuit. Refer to
HAC-65, "A/C AUTO AMP. : Diagnosis
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace parts depending on the inspection results.
HAC-68
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AUTOMATIC AIR CONDITIONER SYSTEM
SYMPTOM DIAGNOSIS
AUTOMATIC AIR CONDITIONER SYSTEM
Diagnosis Chart By Symptom
INFOID:0000000006024072
CAUTION:
Perform the self-diagnoses with on board diagnosis and CONSULT-III before performing the symptom
diagnosis. If any malfunction result or DTC is detected, perform the corresponding diagnosis.
Symptom
Corresponding malfunction part
Check item/Reference
A/C system does not activate.
• Power supply circuit of A/C system
• A/C control (built-in A/C auto amp.)
HAC-65, "A/C AUTO AMP. : Di-
agnosis Procedure"
A/C system cannot be controlled.
Blower motor operation is malfunctioning.
• Blower motor
• Power supply system of blower mo-
tor
• The circuit between blower motor
and A/C auto amp.
• A/C auto amp.
Magnet clutch 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 auto amp.
• 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
• Temperature setting trimmer
• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)
• Engine cooling system
• Heater hose
• Heater core
• Air leakage from each duct
• Temperature setting trimmer
Noise is heard when the A/C
system operates.
During compressor op-
eration
Cooler cycle
XX-XX, "*****"
During blower motor op-
eration
• Mixing any foreign object in blower
motor
• Blower motor fan breakage
• Blower motor rotation inferiority
HAC-58, "Component Inspec-
tion"
• Memory function dose not operates.
• Setting temperature dose not memorize.
• Power supply system of A/C auto
amp.
• A/C auto amp.
INSUFFICIENT COOLING
HAC-69
< SYMPTOM DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
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INSUFFICIENT COOLING
Description
INFOID:0000000006024073
Symptom
• Insufficient cooling
• No cool air comes out. (Air flow volume is normal.)
Diagnosis Procedure
INFOID:0000000006024074
CAUTION:
Perform the self-diagnoses with on board diagnosis and CONSULT-III before performing symptom
diagnosis. If any malfunction result or DTC is detected, perform the corresponding diagnosis.
1.
CHECK MAGNET CLUTCH OPERATION
1.
Turn the ignition switch ON.
2.
Operate the fan control switch.
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
operates.
5.
Press the A/C switch again.
6.
Check that the indicator of the A/C switch turns OFF. Check that the compressor stops.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform the diagnosis of “COMPRESSOR DOSE NOT OPERATE” in “SYMPTOM DIAGNOSIS”.
2.
CHECK DRIVE BELT
Check tension of the drive belt. Refer to
XX-XX, "*****"
.
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 the recovery/recycling recharging equipment to the vehicle and perform the pressure inspection with
the gauge. Refer to
XX-XX, "*****"
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace the parts depending on the inspection results.
4.
CHECK AIR LEAKAGE FROM EACH DUCT
Check duct and nozzle, etc. of the air conditioner system for leakage.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace parts depending on the inspection results.
5.
CHECK AMBIENT TEMPERATURE DISPLAY
Check that there is not much difference between actual ambient temperature and indicated temperature on
information display in combination meter.
NOTE:
Actual ambient temperature is sensor recognition temperature of on board self-diagnosis STEP-5.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Perform the diagnosis for the A/C auto amp. connection recognition signal. Refer to
XX-XX,
"*****"
.
6.
CHECK SETTING OF TEMPERATURE SETTING TRIMMER
1.
Check the setting value of temperature setting trimmer. Refer to
HAC-41, "Temperature Setting Trimmer"
.
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