Qashqai J11. Heater & Air conditioning Control System - part 14

 

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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 

HAC-231, "Removal and Installation"

.

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"

 (HRA2DDT and MR16DDT

engine models for Europe), 

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"

 (HRA2DDT and MR16DDT

engine models for Europe), 

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"

 (HRA2DDT and MR16DDT

engine models for Europe), 

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 

HAC-

232, "Exploded View"

.

Air outlet does not change.

Mode door motor system installation 
condition

Check mode door motor system is 
properly installed. Refer to 

HAC-

232, "Exploded View"

.

Air inlet does not change.

Intake door motor system installation 
condition

Check intake door motor system is 
properly installed. Refer to 

HAC-

232, "Exploded View"

.

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

HAC-222, "Diagnosis Procedure"

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
•

HA-30, "Symptom Table"

 

(HRA2DDT and MR16DDT en-
gine models for Europe)

•

HA-74, "Symptom Table"

 (K9K 

and R9M engine models for Eu-
rope)

•

HA-121, "Symptom Table"

 

(HRA2DDT, MR16DDT and 
MR20DD engine models except 
for Europe)

•

HA-170, "Symptom Table"

 (K9K 

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”.

Refer to 

HAC-225, "Diagnosis Procedure"

.

2.

CHECK DRIVE BELT

Check tension of drive belt. Refer to 

EM-17, "Checking"

 (HRA2DDT engine models), 

EM-142, "Inspection"

(MR16DDT engine models), 

EM-287, "Inspection"

 (MR20DD engine models), 

EM-421, "Inspection"

 (K9K

engine models) or 

EM-520, "Checking"

 (R9M engine models).

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 

HA-28, "Symptom Table"

 (HRA2DDT and MR16DDT engine models for Europe), 

HA-72, "Symptom

Table"

 (K9K and R9M engine models for Europe), 

HA-119, "Symptom Table"

 (HRA2DDT, MR16DDT and

MR20DD engine models except for Europe) or 

HA-168, "Symptom Table"

 (K9K and R9M engine models

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]

C

D

E

F

G

H

J

K

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M

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HAC

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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 

CO-12, "Inspection"

 (HRA2DDT engine mod-

els), 

CO-42, "Inspection"

 (MR16DDT engine models), 

CO-67, "Inspection"

 (MR20DD engine models),

CO-94, "Inspection"

 (K9K engine models) or 

CO-119, "Inspection"

 (R9M engine models).

2.

Check reservoir tank cap. Refer to 

CO-16, "Inspection"

 (HRA2DDT engine models), 

CO-46, "Inspection"

(MR16DDT engine models), 

CO-70, "Inspection"

 (MR20DD engine models), 

CO-97, "Inspection"

 (K9K

engine models) or 

CO-123, "Inspection"

 (R9M engine models).

3.

Check water flow sounds of the engine coolant. Refer to 

CO-12, "Refilling"

 (HRA2DDT engine models),

CO-43, "Refilling"

 (MR16DDT engine models), 

CO-67, "Refilling"

 (MR20DD engine models), 

CO-94,

"Refilling"

 (K9K engine models) or 

CO-119, "Refilling"

 (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 

HA-187, "HEATER

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-118, "Diagnosis Procedure"

.

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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