Nissan Leaf. Manual — part 795
AUTOMATIC AIR CONDITIONING SYSTEM
HAC-183
< SYMPTOM DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
C
D
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F
G
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J
K
L
M
A
B
HAC
N
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SYMPTOM DIAGNOSIS
AUTOMATIC AIR CONDITIONING SYSTEM
Symptom Table
INFOID:0000000010121885
NOTE:
Perform self-diagnoses with CONSULT before performing the symptom diagnosis. If any DTC is detected,
perform the corresponding diagnosis.
Symptom
Corresponding malfunctioning part
Check item/Reference
• Air conditioning system does not activate.
• Air conditioning system cannot be controlled.
• A/C auto amp. ignition power supply
and ground circuit
• A/C auto amp.
HAC-173, "A/C AUTO AMP. : Di-
agnosis Procedure"
Discharge air temperature does not change.
Air mix door motor system installation
condition
Check air mix door motor sys-
tem is properly installed. Refer
to
.
Air outlet does not change.
Mode door motor system installation
condition
Check mode door motor system
is properly installed. Refer to
.
Air inlet does not change.
Intake door motor system installation
condition
Check intake door motor system
is properly installed. Refer to
.
Blower motor does not operates or operation speed is not
normal.
• Blower motor power supply circuit
• Blower motor control circuit
• A/C auto amp. ignition power supply
circuit
• Power transistor power supply and
ground circuit
• Power transistor control signal cir-
cuit
• Blower motor
• Power transistor
• A/C auto amp.
HAC-175, "Diagnosis Proce-
dure"
Compressor does not operate.
• The circuit between VCM and refrig-
erant pressure sensor
• Refrigerant pressure sensor
• Blower fan ON signal circuit
• A/C auto amp.
HAC-186, "Diagnosis Proce-
dure"
• Insufficient cooling.
• No cool air comes out. (Air flow volume is normal.)
• Cooler cycle
• Air leakage from each duct
• A/C auto amp. connection recogni-
tion signal circuit
• Temperature setting trimmer
HAC-184, "Diagnosis Proce-
dure"
• Insufficient heating.
• No warm air comes out. (Air flow volume is normal.)
• Cooler cycle
• Air leakage from each duct
• Temperature setting trimmer
• A/C auto amp. connection
HAC-185, "Diagnosis Proce-
dure"
Noise is heard when the A/C
system operates.
During compressor op-
eration.
Cooler cycle
During blower motor op-
eration.
• Mixing any foreign object in blower
motor
• Blower motor fan breakage
• Blower motor rotation inferiority
HAC-177, "Component Inspec-
tion (Blower Motor)"
• Memory function does not operate normally.
• The setting is not maintained. (It returns to initial condi-
tion.)
• A/C auto amp. battery power supply
circuit
• A/C auto amp.
HAC-184
< SYMPTOM DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
INSUFFICIENT COOLING
INSUFFICIENT COOLING
Description
INFOID:0000000010121886
Symptom
• Insufficient cooling
• No cold air comes out. (Air flow volume is normal.)
Diagnosis Procedure
INFOID:0000000010121887
NOTE:
Perform the self-diagnosis with CONSULT before performing the diagnosis by symptom. Perform the diagno-
sis by DTC if DTC is detected.
1.
CHECK ELECTRIC COMPRESSOR OPERATION
Check the electric compressor operation state while the air conditioner system is operated.
Does electric compressor operate?
YES
>> GO TO 2.
NO
>> Perform diagnosis for “COMPRESSOR DOES NOT OPERATE”. Refer to
.
2.
CHECK REFRIGERANT CYCLE
Connect recovery/recycling/recharging equipment to the vehicle and perform the refrigerant system diagnosis.
.
Is the check result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning component.
3.
CHECK FOR AIR LEAKAGE FROM DUCT
Check duct and nozzle, etc. of A/C system for air leakage.
Is the check result normal?
YES
>> GO TO 4.
NO
>> Repair or replace malfunctioning component.
4.
CHECK DETECTION TEMPERATURE OF EACH SENSOR
With CONSULT
Using CONSULT, check that detection temperature of each sensor is normal in “Data Monitor” of “HVAC”.
Is the check result normal?
YES
>> GO TO 5.
NO
>> Repair or replace malfunctioning component.
5.
CHECK SETTING OF DIFFERENCE BETWEEN SET TEMPERATURE AND CONTROL TEMPERATURE
With CONSULT
1. Using CONSULT, check the setting of “TEMP SET CORRECT” on “Work support” of “HVAC”. Refer to
HAC-83, "Temperature Setting Trimmer"
.
2. Check that the difference between set temperature and control temperature is set to “+ direction”.
NOTE:
The control temperature can be set with a setting difference between the set temperature and control tem-
perature.
3. Change the set temperature correction value to “0”.
Are the symptoms solved?
YES
>> Perform the setting separately if necessary. Inspection End.
NO
>> Replace A/C auto amp. Refer to
HAC-187, "Removal and Installation"
.
INSUFFICIENT HEATING
HAC-185
< SYMPTOM DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
INSUFFICIENT HEATING
Description
INFOID:0000000010121888
Symptom
• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)
Diagnosis Procedure
INFOID:0000000010121889
NOTE:
Perform the self-diagnosis with CONSULT before performing the diagnosis by symptom. Perform the diagno-
sis by DTC if DTC is detected.
1.
CHECK REFRIGERANT CYCLE
Connect recovery/recycling/recharging equipment to the vehicle and perform the refrigerant system diagnosis.
Is the check result normal?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning component.
2.
CHECK FOR AIR LEAKAGE FROM DUCT
Check duct and nozzle, etc. of A/C system for air leakage.
Is the check result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning component.
3.
CHECK DETECTION TEMPERATURE OF EACH SENSOR
With CONSULT
Using CONSULT, check that detection temperature of each sensor is normal in “Data Monitor” of “HVAC”.
Is the check result normal?
YES
>> GO TO 4.
NO
>> Repair or replace malfunctioning component.
4.
CHECK SETTING OF DIFFERENCE BETWEEN SET TEMPERATURE AND CONTROL TEMPERATURE
With CONSULT
1. Using CONSULT, check the setting of “TEMP SET CORRECT” on “Work support” of “HVAC”. Refer to
HAC-83, "Temperature Setting Trimmer"
.
2. Check that the difference between set temperature and control temperature is set to “
− direction”.
NOTE:
The control temperature can be set with a setting difference between the set temperature and control tem-
perature.
3. Change the set temperature correction value to “0”.
Are the symptoms solved?
YES
>> Perform the setting separately if necessary. Inspection End.
NO
>> Replace A/C auto amp. Refer to
HAC-187, "Removal and Installation"
.
HAC-186
< SYMPTOM DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
COMPRESSOR DOES NOT OPERATE
COMPRESSOR DOES NOT OPERATE
Description
INFOID:0000000010121890
SYMPTOM
Compressor does not operate.
Diagnosis Procedure
INFOID:0000000010121891
NOTE:
• Perform self-diagnoses with CONSULT before performing symptom diagnosis. If any DTC is detected, per-
form 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 REFRIGERANT PRESSURE SENSOR
Check refrigerant pressure sensor. Refer to
EVC-362, "Diagnosis Procedure"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning component.
2.
CHECK A/C AUTO AMP. INPUT SIGNAL
With CONSULT
1. Select “DATA MONITOR” mode of “HVAC” using CONSULT.
2. Select “FORCED Off SIGNAL”, and check status under the following conditions.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Check for the VCM. Refer to
EVC-41, "ELECTRIC POWER TRAIN SYSTEM : System Descrip-
.
3.
CHECK A/C AUTO AMP. OUTPUT SIGNAL
With CONSULT
1. Set the vehicle to READY.
2. Using CONSULT, perform “HVAC TEST” in “Active Test” of “HVAC”. Refer to
3. Check the electric compressor operations in each mode.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-187, "Removal and Installation"
.
NO
>> Replace electric compressor. Refer to
HA-37, "Removal and Installation"
.
Monitor item
Condition
Status
FORCED Off SIGNAL
Power switch ON
A/C switch ON (A/C compres-
sor activate)
Normal condition: OFF
Except above: ON
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