HEATER AND AIR CONDITIONING SYSTEM CONTROL SYMPTOMS
Symptom Table
SYMPTOM TABLE
Symptom |
Reference Page |
|
A/C system does not come on. | Go to Trouble Diagnosis Procedure for A/C System. | HAC-166, "FRONT A/C CONTROL : Diagnosis Procedure" |
Air outlet does not change. | Go to Trouble Diagnosis Procedure for Mode Door Motor. | HAC-160, "Diagnosis Procedure" |
Mode door motor does not operate normally. | ||
Discharge air temperature does not change. | Go to Trouble Diagnosis Procedure for Air Mix Door Motor. | HAC-163, "Diagnosis Procedure |
Air mix door motor does not operate normal ly. | ||
Intake door does not change. | Go to Trouble Diagnosis Procedure for Intake Door Motor. | HAC-157, "Diagnosis Procedure" |
Intake door motor does not operate normally. | ||
Blower motor operation is malfunctioning. | Go to Trouble Diagnosis Procedure for Blower Motor | HAC-167, "Diagnosis Procedure" |
Magnet clutch does not engage. | Go to Trouble Diagnosis Procedure for Magnet Clutch. | HAC-171, "Component Function Check" |
Insufficient cooling | Go to Trouble Diagnosis Procedure for Insufficient Cooling. | HAC-175, "Component Function Check" |
Insufficient heating | Go to Trouble Diagnosis Procedure for Insufficient Heating. | HAC-177, "Component Function Check" |
Noise | Go to Trouble Diagnosis Procedure for Noise. | HA-20, "Symptom Table" |
INSUFFICIENT COOLING
Component Function Check
SYMPTOM: Insufficient cooling
INSPECTION FLOW
1. CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - TEMPERATURE DECREASE
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 HAC-148, "Work Procedure".
Does another symptom exist? YES >> Refer to HAC-174, "Symptom Table".
NO >> System OK.
3. CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4. CHECK DRIVE BELTS
Check A/C compressor belt tension. Refer to EM-13, "Checking".
Is the inspection result normal? YES >> GO TO 5.
NO >> Adjust or replace compressor belt. Refer to EM-13, "Tension Adjustment".
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 air mix door motor circuit. Refer to HAC-163, "Diagnosis Procedure".
6. CHECK COOLING FAN MOTOR OPERATION
Check and verify cooling fan motor for smooth operation.
Does cooling fan motor operation correctly? YES >> GO TO 7.
NO >> Check cooling fan motor. Refer to EC-458, "Component Function Check".
7. CHECK RECOVERY/RECYCLING EQUIPMENT BEFORE USAGE
Check recovery/recycling equipment before connecting to vehicle. Verify there is no pressure in the recovery/ recycling equipment by checking the gauges. If pressure exists, recover refrigerant from equipment lines.
>> GO TO 8.
8. CHECK REFRIGERANT PURITY
Is the inspection result normal? YES >> GO TO 9.
NO >> Check contaminated refrigerant. Refer to HA-21, "Description".
9. CHECK REFRIGERANT PRESSURE
Check refrigerant pressure with manifold gauge connected. Refer to HA-28, "Inspection".
Is the inspection result normal? YES >> Perform diagnostic work flow. Refer to HA-15, "Workflow".
NO >> GO TO 10.
10. CHECK FOR EVAPORATOR FREEZE UP
Start engine and run A/C. Check for evaporator freeze up.
Does evaporator freeze up? YES >> Perform diagnostic work flow. Refer HA-15, "Workflow".
NO >> GO TO 11.
11. CHECK AIR DUCTS
Check ducts for air leaks.
Is the inspection result normal? YES >> System OK.
NO >> Repair air leaks.
INSUFFICIENT HEATING
Component Function Check
SYMPTOM: Insufficient heating
INSPECTION FLOW
1. CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - TEMPERATURE INCREASE
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 HAC-148, "Work Procedure".
Does another symptom exist? YES >> Refer to HAC-174, "Symptom Table".
NO >> System OK.
3. CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4. CHECK ENGINE 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
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 CO-22, "Inspection".
Is the inspection result normal?
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 >>
10. CHECK HEATER HOSE TEMPERATURES
Is the inspection result normal? YES >> System OK.
NO >> Replace heater core. Refer to HA-43, "HEATER CORE : Removal and Installation".
COMPRESSOR DOES NOT OPERATE
Description
Symptom: Compressor does not operate.
Diagnosis Procedure
NOTE:
1.CHECK MAGNET CLUTCH OPERATION
Check magnet clutch. Refer to HAC-171, "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-482, "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 front air control. Refer to HAC-181, "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-17, "Trouble Diagnosis Flow Chart".
5.CHECK IPDM E/R INPUT SIGNAL
With CONSULT
Is the inspection result normal? YES >> Inspection End.
NO >> Check CAN communication system. Refer to LAN-17, "Trouble Diagnosis Flow Chart".
Periodic maintenance
Introduction of Periodic Maintenance
The following tables show the normal maintenance schedule. Depending upon
weather and atmospheric conditions,
varying road surfaces, individual driving habits and vehicle usage, additional
or more frequent maintenance
may be required.
Periodic maintenan ...
P0222, P0223 TP sensor
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P0222
TP SEN 1/CIRC-B1
(Throttle/pedal position sensor/switch ″B″
circuit low)
An excessively low voltage from the TP sensor 1 is se ...
U0101 CAN comm circuit
Description
CAN (Controller Area Network) is a serial communication line for real time
application. It is an on-vehicle multiplex
communication line with high data communication speed and excellent error
detection ability. Many electronic
control units are equipped onto a vehicle, and each co ...