Nissan Sentra. Manual — part 584
HAC-184
< SYMPTOM DIAGNOSIS >
[MANUAL AIR CONDITIONER]
INSUFFICIENT HEATING
INSUFFICIENT HEATING
Component Function Check
INFOID:0000000009757772
SYMPTOM: Insufficient heating
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - TEMPERATURE INCREASE
1. Turn temperature control dial clockwise to maximum heat.
2. Check for hot air at discharge air outlets.
Can a symptom be duplicated?
YES
>> GO TO 3
NO
>> GO TO 2
2.
CHECK FOR ANY SYMPTOMS
Perform a complete operational check and check for any symptoms. Refer to
Does another symptom exist?
YES
>> Refer to
.
NO
>> System OK.
3.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4
4.
CHECK ENGINE COOLING SYSTEM
1. Check for proper engine coolant level. Refer to
.
2. Check hoses for leaks or kinks.
3. Check radiator cap. Refer to
4. Check for air in cooling system.
>> GO TO 5
5.
CHECK AIR MIX DOOR MOTOR OPERATION
Check and verify air mix door mechanism for smooth operation.
Does air mix door operate correctly?
YES
>> GO TO 6
NO
>> Check the air mix door motor circuit. Refer to
HAC-163, "Diagnosis Procedure"
.
6.
CHECK AIR DUCTS
Check for disconnected or leaking air ducts.
Is the inspection result normal?
YES
>> GO TO 7
NO
>> Repair all disconnected or leaking air ducts.
7.
CHECK HEATER HOSE TEMPERATURES
1. Start engine and warm it up to normal operating temperature.
2. Touch both the inlet and outlet heater hoses. The inlet hose should be hot and the outlet hose should be
warm.
Is the inspection result normal?
YES
>> GO TO 8
NO
>> Both hoses warm: GO TO 9
8.
CHECK ENGINE COOLANT SYSTEM
Check thermostat operation. Refer to
Is the inspection result normal?
INSUFFICIENT HEATING
HAC-185
< SYMPTOM DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
YES
>> System OK.
NO
>> Repair or replace as necessary.
9.
CHECK HEATER HOSES
Check heater hoses for proper installation.
Is the inspection result normal?
YES
>> System OK.
NO
>> 1. Back flush heater core.
2. Drain the water from the system.
3. Refill system with new engine coolant. Refer to
CO-12, "Changing Engine Coolant"
4. To retest GO TO 10
10.
CHECK HEATER HOSE TEMPERATURES
1. Start engine and warm up to normal operating temperature.
2. Touch both the inlet and outlet heater hoses. The inlet hose should be hot and the outlet hose should be
warm
Is the inspection result normal?
YES
>> System OK.
NO
>> Replace heater core. Refer to
HAC-186
< SYMPTOM DIAGNOSIS >
[MANUAL AIR CONDITIONER]
COMPRESSOR DOES NOT OPERATE
COMPRESSOR DOES NOT OPERATE
Description
INFOID:0000000009757773
Symptom: Compressor does not operate.
Diagnosis Procedure
INFOID:0000000009757774
NOTE:
• Perform self-diagnoses with CONSULT before performing symptom diagnosis. If DTC is detected, perform
the corresponding diagnosis.
• Check that refrigerant system is properly charged. If refrigerant amount is below the proper amount, perform
inspection of refrigerant leakage.
1.
CHECK MAGNET CLUTCH OPERATION
Check magnet clutch. Refer to
HAC-178, "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-465, "Component Function Check"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning parts.
3.
CHECK FRONT AIR CONTROL OUTPUT SIGNAL
With CONSULT
Check “FAN ON” and “” in “DATA MONITOR” mode of “” using CONSULT.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace A/C switch assembly. Refer to
HAC-188, "Removal and Installation"
4.
CHECK ECM INPUT SIGNAL
With CONSULT
Check “AIR COND SIG” and “HEATER FAN SW” in “DATA MONITOR” mode of “ECM” using CONSULT.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Check CAN communication system. Refer to
LAN-16, "Trouble Diagnosis Flow Chart"
5.
CHECK IPDM E/R INPUT SIGNAL
With CONSULT
1. Start engine.
Monitor item
Condition
Status
AIR COND SW
A/C switch
ON
On
OFF
Off
FAN ON
Blower motor
ON
On
OFF
Off
Monitor item
Condition
Status
AIR COND SIG
A/C switch
ON
On
OFF
Off
HEATER FAN SW
Blower motor
ON
On
OFF
Off
COMPRESSOR DOES NOT OPERATE
HAC-187
< SYMPTOM DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
2. Check “AC COMP REQ” in “DATA MONITOR” mode of “IPDM E/R” using CONSULT.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Check CAN communication system. Refer to
LAN-16, "Trouble Diagnosis Flow Chart"
Monitor item
Condition
Status
AC COMP REQ
A/C switch
ON
On
OFF
Off
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