Qashqai J11. Heater & Air conditioning Control System — part 14
BLOWER MOTOR
HAC-209
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
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Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 6.
6.
CHECK FAN CONTROL AMP. POWER SUPPLY CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Disconnect blower motor connector.
3.
Check continuity between fan control amp. harness connector and blower motor harness connector.
Is the inspection result normal?
YES
>> Replace blower motor. Refer to
VTL-17, "Removal and Installation"
.
NO
>> Repair harness or connector.
7.
CHECK FAN CONTROL AMP. GROUND CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Check continuity between fan control amp. harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair harness or connector.
8.
CHECK FAN CONTROL AMP. CONTROL SIGNAL (GATE) CIRCUIT FOR OPEN
Check continuity between fan control amp. harness connector and A/C amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair harness or connector.
9.
CHECK FAN CONTROL AMP. CONTROL SIGNAL CIRCUIT FOR SHORT
Check continuity between fan control amp. harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair harness or connector.
+
−
Voltage
Fan control amp.
Connector
Terminal
M181
1
Ground
11 – 14 V
Fan control amp.
Blower motor
Continuity
Connector
Terminal
Connector
Terminal
M181
1
M357
2
Existed
Fan control amp.
—
Continuity
Connector
Terminal
M181
3
Ground
Existed
Fan control amp.
A/C amp.
Continuity
Connector
Terminal
Connector
Terminal
M181
2
M50
1
Existed
Fan control amp.
—
Continuity
Connector
Terminal
M181
2
Ground
Not existed
HAC-210
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
BLOWER MOTOR
10.
CHECK FAN CONTROL AMP.
Check fan control amp. Refer to
HAC-211, "Component Inspection (Fan Control Amp.)"
.
Is the inspection result normal?
YES
>> Replace A/C amp. Refer to
HAC-226, "Removal and Installation"
.
NO
>> Replace fan control amp. Refer to
HAC-231, "Removal and Installation"
11.
CHECK A/C AMP. IGNITION POWER SUPPLY FEEDBACK SIGNAL
1.
Turn ignition switch ON.
2.
Check voltage between A/C amp. harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> Repair harness or connector between A/C amp. and fuse.
12.
CHECK BLOWER MOTOR FEEDBACK SIGNAL CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Disconnect blower motor connector and A/C amp. connector.
3.
Check continuity between blower motor harness connector and A/C amp. harness connector.
Is the inspection result normal?
YES
>> Replace A/C amp. Refer to
HAC-226, "Removal and Installation"
.
NO
>> Repair harness or connector.
13.
CHECK BLOWER MOTOR FEEDBACK SIGNAL CIRCUIT AND FAN CONTROL AMP. POWER SUPPLY
CIRCUIT FOR SHORT
1.
Turn ignition switch OFF.
2.
Disconnect following connectors.
-
Blower fan motor
-
Fan control amp.
-
A/C amp.
3.
Check continuity between blower motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> Repair harness or connector.
14.
CHECK FAN CONTROL AMP. CONTROL SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
Check harness between fan control amp. harness connector and A/C amp. harness connector for short to
power supply.
+
−
Voltage
A/C amp.
Connector
Terminal
M50
4
Ground
11 – 14 V
Blower motor
A/C amp.
Continuity
Connector
Terminal
Connector
Terminal
M357
2
M50
17
Existed
Blower motor
—
Continuity
Connector
Terminal
M357
2
Ground
Not existed
BLOWER MOTOR
HAC-211
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
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Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair harness or connector.
Component Inspection (Blower Motor)
INFOID:0000000010432567
1.
CHECK BLOWER MOTOR-I
1.
Remove blower motor. Refer to
VTL-17, "Removal and Installation"
2.
Check that there is not any mixing foreign object in the blower motor.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace blower motor. Refer to
VTL-17, "Removal and Installation"
.
2.
CHECK BLOWER MOTOR-II
Check that there is not breakage or damage in the blower motor.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace blower motor. Refer to
VTL-17, "Removal and Installation"
.
3.
CHECK BLOWER MOTOR-III
Check that blower motor turns smoothly.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace blower motor. Refer to
VTL-17, "Removal and Installation"
.
Component Inspection (Blower Relay)
INFOID:0000000010432568
1.
CHECK BLOWER RELAY
1.
Remove blower relay. Refer to
PG-104, "Fuse, Connector and Terminal Arrangement"
2.
Check continuity between blower relay terminal 3 and 5 when
the voltage is supplied between terminal 1 and 2.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace blower relay.
Component Inspection (Fan Control Amp.)
INFOID:0000000010520950
1.
CHECK FAN CONTROL AMP.
1.
Remove fan control amp. Refer to
HAC-231, "Removal and Installation"
.
2.
Check continuity between fan control amp. terminals.
Fan control amp.
—
Voltage
Connector
Terminal
M181
2
Ground
0 V
Terminal
Voltage
Continuity
3
5
ON
Existed
OFF
Not existed
JSIIA1551ZZ
+
−
Continuity
Terminal
Terminal
1
3
Existed
3
1
Not existed
HAC-212
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
BLOWER MOTOR
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace fan control amp. Refer to
MAGNET CLUTCH
HAC-213
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
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MAGNET CLUTCH
Component Function Check
INFOID:0000000010500541
1.
CHECK MAGNET CLUTCH OPERATION
CONSULT ACTIVE TEST
1.
Select “COMPRESSOR” of IPDM E/R active test item.
2.
With operating the test item, check magnet clutch operation by listening and viewing.
Does it operate normally?
YES
>> INSPECTION END
NO
>> Refer to
HAC-213, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000010500542
1.
CHECK MAGNET CLUTCH
CONSULT
1.
Turn ignition switch OFF
2.
Disconnect compressor connector.
3.
Select “COMPRESSOR” of IPDM E/R active test item.
4.
With operating the test item, check Check voltage between compressor harness connector and ground.
Does it operate normally?
YES
>> GO TO 4.
NO
>> GO TO 2.
2.
CHECK FUSE
1.
Turn ignition switch OFF
2.
Check 15 A fuse (No. 57, located in IPDM E/R).
NOTE:
Refer to
PG-109, "Fuse, Connector and Terminal Arrangement"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
3.
CHECK MAGNET CLUTCH POWER SUPPLY CIRCUIT FOR OPEN
1.
Disconnect IPDM E/R connector.
2.
Check continuity between IPDM E/R harness connector and compressor harness connector.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-68, "Removal and Installation"
.
NO
>> Repair harness or connector.
4.
CHECK MAGNET CLUTCH GROUND CIRCUIT FOR OPEN
Check continuity between compressor harness connector and ground.
+
−
Condition
Voltage
Compressor
Connector
Terminal
F6
1
Ground
Active test: COM-
PRESSOR
Off
0 - 0.1 V
On
11 - 14 V
IPDM E/R
Compressor
Continuity
Connector
Terminal
Connector
Terminal
F90
95
F6
1
Existed
HAC-214
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
MAGNET CLUTCH
Is the inspection result normal?
YES
>> Replace compressor. Refer to
HA-31, "Removal and Installation"
HA-75, "Removal and Installation"
. (K9K and R9M engine models for
Europe),
HA-122, "Removal and Installation"
(HRA2DDT, MR16DDT and MR20DD engine mod-
els except for Europe) or
HA-171, "Removal and Installation"
. (K9K and R9M engine models
except for Europe).
NO
>> Repair harness or connector.
Compressor
—
Continuity
Connector
Terminal
F6
2
Ground
Existed
ECV (ELECTRICAL CONTROL VALVE)
HAC-215
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
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ECV (ELECTRICAL CONTROL VALVE)
Diagnosis Procedure
INFOID:0000000010500543
1.
CHECK ECV POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect compressor connector.
3.
Turn ignition switch ON.
4.
Check voltage between compressor harness connector and ground.
Except for HR engine models with CVT, MR16DDT engine models and R9M engine models for EURO3
HR engine models with CVT, MR16DDT engine models and R9M engine models for EURO3
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK ECV POWER SUPPLY CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R connector.
3.
Check continuity between compressor harness connector and IPDM E/R harness connector.
Except for HR engine models with CVT, MR16DDT engine models and R9M engine models for EURO3
HR engine models with CVT, MR16DDT engine models and R9M engine models for EURO3
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-68, "Removal and Installation"
.
NO
>> Repair harness or connector.
3.
CHECK ECV CONTROL SIGNAL CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R connector.
3.
Check continuity between compressor harness connector and IPDM E/R harness connector.
Except for HR engine models with CVT, MR16DDT engine models and R9M engine models for EURO3
+
−
Voltage
Compressor
Connector
Terminal
F151
3
Ground
11 - 14 V
+
−
Voltage
Compressor
Connector
Terminal
F180
3
Ground
11 - 14 V
Compressor
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F151
3
F90
101
Existed
Compressor
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F180
3
F90
101
Existed
Compressor
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F151
4
F89
82
Existed
HAC-216
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
ECV (ELECTRICAL CONTROL VALVE)
HR engine models with CVT, MR16DDT engine models and R9M engine models for EURO3
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK ECV
Check ECV. Refer to
HAC-216, "Component Inspection"
.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-68, "Removal and Installation"
NO
>> Replace compressor. Refer to
HA-31, "Removal and Installation"
HA-75, "Removal and Installation"
. (K9K and R9M engine models for
Europe),
HA-122, "Removal and Installation"
(HRA2DDT, MR16DDT and MR20DD engine mod-
els except for Europe) or
HA-171, "Removal and Installation"
. (K9K and R9M engine models
except for Europe).
Component Inspection
INFOID:0000000010500544
1.
CHECK ECV
Check continuity between compressor terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace compressor. Refer to
HA-31, "Removal and Installation"
HA-75, "Removal and Installation"
. (K9K and R9M engine models for
Europe),
HA-122, "Removal and Installation"
(HRA2DDT, MR16DDT and MR20DD engine mod-
els except for Europe) or
HA-171, "Removal and Installation"
. (K9K and R9M engine models
except for Europe).
Compressor
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
F180
4
F89
82
Existed
Terminal
Continuity
3
4
Existed
PTC HEATER
HAC-217
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
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PTC HEATER
Component Function Check
INFOID:0000000010500545
1.
CHECK PTC HEATER OPERATION
1.
Start the engine.
2.
Operate blower motor.
3.
Operate temperature control dial to full hot position.
4.
Check for warm air at discharge air outlet.
NOTE:
• Engine must be cold.
• Battery must be charged.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Refer to
HAC-217, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000010500546
1.
CHECK FUSE AND FUSIBLE LINK
1.
Turn ignition switch OFF.
2.
Check 30 A fuses (Nos. 35, 36 and 40).
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the blown fuse or fusible link after repairing the affected circuit if a fuse is blown.
2.
CHECK PTC RELAY POWER SUPPLY
1.
Disconnect PTC relay connector.
2.
Turn ignition switch ON.
3.
Check voltage between PTC relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector between PTC relay and fuse.
3.
CHECK PTC RELAY CONTROL SIGNAL CIRCUIT FOR OPEN
1.
Disconnect BCM connector.
2.
Check continuity between PTC relay harness connector and BCM harness connector.
Is the inspection result normal?
Relay
+
−
Voltage
PTC relay
Connector
Terminal
1
E27
2
Ground
Battery voltage
3
2
E28
2
3
3
E29
2
3
PTC relay
BCM
Continuity
Relay
Connector
Terminal
Connector
Terminal
1
E27
1
E60
172
Existed
2
E28
173
3
E29
170
HAC-218
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
PTC HEATER
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK PTC HEATER POWER SUPPLY CIRCUIT FOR OPEN
Check continuity between PTC relay harness connector and PTC heater harness connector.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair harness or connector.
5.
CHECK PTC HEATER GROUND CIRCUIT FOR OPEN
Check continuity between PTC heater harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK PTC RELAY
Check PTC relay. Refer to
HAC-218, "Component Inspection (PTC Relay)"
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace malfunctioning PTC relay.
7.
CHECK PTC HEATER
Check PTC heater. Refer to
HAC-219, "Component Inspection (PTC Heater)"
.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-135, "Removal and Installation"
.
NO
>> Replace PTC heater. Refer to
HAC-230, "Removal and Installation"
.
Component Inspection (PTC Relay)
INFOID:0000000010500547
1.
CHECK PTC RELAY
1.
Remove PTC relay.
2.
Check continuity between PTC relay terminals 3 and 5 when the
voltage is supplied between terminals 1 and 2.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace malfunctioning PTC relay.
PTC relay
PTC heater
Continuity
Relay
Connector
Terminal
Connector
Terminal
1
E27
5
E140
1
Existed
2
E28
3
3
E29
5
PTC heater
—
Continuity
Connector
Terminal
E140
2
Ground
Existed
4
Terminal
Voltage
Continuity
3
5
ON
Existed
OFF
Not existed
JSIIA1551ZZ
PTC HEATER
HAC-219
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
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Component Inspection (PTC Heater)
INFOID:0000000010500548
1.
CHECK PTC HEATER
Check resistance between PTC heater terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace PTC heater. Refer to
HAC-230, "Removal and Installation"
.
Terminal
Resistance (
Ω
)
1
2
Except 0 or
∞
3
2 and 4
5
4
HAC-220
< SYMPTOM DIAGNOSIS >
[MANUAL AIR CONDITIONING]
MANUAL AIR CONDITIONING SYSTEM
SYMPTOM DIAGNOSIS
MANUAL AIR CONDITIONING SYSTEM
Symptom Table
INFOID:0000000010432573
NOTE:
Perform self-diagnoses with CONSULT before performing the symptom diagnosis. If any DTC is detected,
perform the corresponding diagnosis.
Symptom
Corresponding malfunction part
Check item/Reference
Air conditioning cannot be controlled.
• A/C amp. power supply or ground cir-
cuit
• A/C amp.
Check A/C amp. power supply and
ground circuits.
HAC-207, "A/C AMP. : Diagnosis
Procedure"
Discharge air temperature does not change.
Air mix door motor system installation
condition
Check air mix door motor system 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.
• A/C amp. ignition power supply sig-
nal circuit
• Fan control amp. power supply circuit
• Fan control amp. ground circuit
• Fan control amp. control signal circuit
• Blower motor
• Fan control amp.
• A/C amp.
Check blower motor circuits.
HAC-208, "Diagnosis Procedure"
Blower motor operates at the maxi-
mum fan speed and fan speed can-
not be selected.
Blower motor
can be switched
to OFF.
• A/C amp. ignition power supply sig-
nal circuit
• Blower motor feedback signal circuit
• A/C amp.
Blower motor
cannot be
switched to
OFF.
• Blower motor feedback signal circuit
• A/C amp. power supply circuit
• Fan control amp. power supply circuit
• Fan control amp. control signal circuit
• Fan control amp.
• A/C amp.
Compressor does not operate.
• Magnet clutch
• Magnet clutch power supply circuit
• Magnet clutch ground circuit
• IPDM E/R (A/C relay)
• The circuit between ECM and refrig-
erant pressure sensor
• Refrigerant pressure sensor
• ECM
• A/C amp.
Check magnet clutch circuits.
HAC-213, "Component Function
Check"
• Insufficient cooling
• No cool air comes out. (Air flow volume is normal.)
• Magnet clutch control system
• Drive belt slipping
• Cooler cycle
• ECV (Electrical control valve)
• Air leakage from each duct
MANUAL AIR CONDITIONING SYSTEM
HAC-221
< SYMPTOM DIAGNOSIS >
[MANUAL AIR CONDITIONING]
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• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)
• Engine cooling system
• Heater hose
• Heater core
• Air leakage from each duct
• PTC heater system (with PTC heat-
er)
HAC-223, "Diagnosis Procedure"
Noise is heard
when the air
conditioning op-
erates.
During compressor operation
Cooler cycle
Symptom table for noise
•
(HRA2DDT and MR16DDT en-
gine models for Europe)
•
and R9M engine models for Eu-
rope)
•
(HRA2DDT, MR16DDT and
MR20DD engine models except
for Europe)
•
and R9M engine models except
for Europe)
During blower motor operation
• Mixing any foreign object in blower
motor
• Blower motor fan breakage
• Blower motor rotation inferiority
Check blower motor.
HAC-211, "Component Inspection
(Blower Motor)"
Symptom
Corresponding malfunction part
Check item/Reference
HAC-222
< SYMPTOM DIAGNOSIS >
[MANUAL AIR CONDITIONING]
INSUFFICIENT COOLING
INSUFFICIENT COOLING
Description
INFOID:0000000010432574
Symptom
• Insufficient cooling
• No cool air comes out. (Air flow volume is normal.)
Diagnosis Procedure
INFOID:0000000010432575
NOTE:
Perform self-diagnoses with CONSULT before performing symptom diagnosis. If any DTC is detected, per-
form the corresponding diagnosis.
1.
CHECK MAGNET CLUTCH OPERATION
1.
Turn ignition switch ON.
2.
Operate fan control dial and operate blower fan.
3.
Press A/C switch.
4.
Check that A/C indicator turns ON. Check visually and by sound that compressor operates.
5.
Press A/C switch again.
6.
Check that A/C indicator turns OFF. Check that compressor stops.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform diagnosis of “COMPRESSOR DOES NOT OPERATE” in “SYMPTOM DIAGNOSIS”.
HAC-225, "Diagnosis Procedure"
2.
CHECK DRIVE BELT
Check tension of drive belt. Refer to
(HRA2DDT engine models),
(MR16DDT engine models),
(K9K
engine models) or
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 recovery/recycling recharging equipment to the vehicle and perform pressure inspection with gauge.
Refer to
(HRA2DDT and MR16DDT engine models for Europe),
(K9K and R9M engine models for Europe),
(HRA2DDT, MR16DDT and
MR20DD engine models except for Europe) or
except for Europe).
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace parts depending on the inspection results.
4.
CHECK ECV
Perform ECV circuit diagnosis. Refer to
HAC-215, "Diagnosis Procedure"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace parts depending on the inspection results.
5.
CHECK AIR LEAKAGE FROM EACH DUCT
Check duct and nozzle, etc. of the air conditioning system for leakage.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace parts depending on the inspection results.
INSUFFICIENT HEATING
HAC-223
< SYMPTOM DIAGNOSIS >
[MANUAL AIR CONDITIONING]
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INSUFFICIENT HEATING
Description
INFOID:0000000010432576
Symptom
• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)
Diagnosis Procedure
INFOID:0000000010432577
NOTE:
Perform self-diagnoses with CONSULT before performing symptom diagnosis. If any DTC is detected, per-
form the corresponding diagnosis.
1.
CHECK COOLING SYSTEM
1.
Check engine coolant level and check for leakage. Refer to
(HRA2DDT engine mod-
els),
(MR16DDT engine models),
(MR20DD engine models),
(K9K engine models) or
2.
Check reservoir tank cap. Refer to
(MR16DDT engine models),
(MR20DD engine models),
(K9K
engine models) or
(R9M engine models).
3.
Check water flow sounds of the engine coolant. Refer to
(MR20DD engine models),
(K9K engine models) or
(R9M engine models).
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 HEATER HOSE
Check installation of 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 HEATER CORE
1.
Check temperature of inlet hose and outlet hose of heater core.
2.
Check that inlet side of 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 heater core. Refer to
HA-46, "HEATER CORE : Removal and Installation"
(HRA2DDT
and MR16DDT engine models for Europe),
HA-90, "HEATER CORE : Removal and Installation"
(K9K and R9M engine models for Europe),
HA-139, "HEATER CORE : Removal and Installation"
(HRA2DDT, MR16DDT and MR20DD engine models except for Europe) or
CORE : Removal and Installation"
(K9K and R9M engine models except for Europe).
4.
CHECK AIR LEAKAGE FROM EACH DUCT
Check duct and nozzle, etc. of the air conditioning system for air leakage.
Is the inspection result normal?
YES-1 >> With PTC heater: GO TO 5.
YES-2 >> Without PTC heater: INSPECTION END
NO
>> Repair or replace parts depending on the inspection results.
5.
CHECK PTC HEATER
Perform PTC heater diagnosis. Refer to
HAC-224
< SYMPTOM DIAGNOSIS >
[MANUAL AIR CONDITIONING]
INSUFFICIENT HEATING
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace parts depending on the inspection results.
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