Nissan March K13. Manual - part 401

HAC-138

< BASIC INSPECTION >

[HEATER AND VENTILATION]

OPERATION INSPECTION

OPERATION INSPECTION

Description & Inspection

INFOID:0000000006024163

DESCRIPTION

The purpose of the operational check is to check that the individual system operates normally. 

INSPECTION PROCEDURE

1.

CHECK BLOWER MOTOR

1.

Start the engine.

2.

Operate the fan control dial. Check that the fan speed changes. Check the operation for all fan speeds. 

3.

Leave blower on maximum speed.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Blower motor system malfunction. Refer to 

HAC-139, "Diagnosis Procedure"

. 

2.

CHECK DISCHARGE AIR

1.

Operate MODE dial to each position. 

2.

Check that the air outlets change according to each indicated air outlet by placing a hand in front of the
outlets. Refer to 

XX-XX, "*****"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the mode door cable. 

3.

CHECK INTAKE AIR

1.

Press intake switch to set the air outlet to recirculation. 

2.

The intake switch indicator turns ON. 

3.

Listen to intake sound and confirm air inlets change. 

4.

Press intake switch again to set the air outlet to fresh air intake. 

5.

The intake switch indicator turns OFF. 

6.

Listen to intake sound and confirm air inlets change. 

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Intake door system malfunction. Refer to 

XX-XX, "*****"

. 

4.

CHECK TEMPERATURE INCREASE

1.

Turn temperature control dial to full hot position after warming up the engine.

2.

Check that warm air blows from outlets.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Insufficient heating. Refer to 

HAC-145, "Diagnosis Procedure"

. 

Check condition

: Engine running at normal operating temperature.

BLOWER MOTOR

HAC-139

< DTC/CIRCUIT DIAGNOSIS >

[HEATER AND VENTILATION]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

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DTC/CIRCUIT DIAGNOSIS

BLOWER MOTOR

Diagnosis Procedure

INFOID:0000000006024175

1.

CHECK FUSE

Check 15A fuses [Nos. 14 and 16, located in the fuse block (J/B)].
NOTE:
Refer to 

XX-XX, "*****"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace fuse after repairing the applicable circuit.

2.

CHECK POWER SUPPLY FOR BLOWER MOTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the blower motor connector.

3.

Turn the ignition switch ON.

4.

Check voltage between blower motor harness connector and the ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

CHECK BLOWER RELAY

1.

Turn the ignition switch OFF.

2.

Perform the component inspection of blower motor relay. Refer to 

HAC-140, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace the harness or connector between blower motor and fuse.

NO

>> Replace the blower relay.

4.

CHECK HEATER CONTROL GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect the heater control connector.

3.

Check continuity between heater control harness connector and the ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair the harness or connector.

5.

CHECK CONTINUITY BETWEEN HEATER CONTROL AND BLOWER MOTOR

Check continuity the heater control harness connector and blower motor harness connector.

Is the inspection result normal?

(+)

(

−

)

Voltage

(Approx.)

Blower motor

—

Connector

Terminal

M39

1

Ground

Battery voltage

Heater control

—

Continuity

Connector

Terminal

M28

6

Ground

Existed

Heater control

Blower motor

Continuity

Connector

Terminal

Connector

Terminal

M28

1

M39

2

Existed

HAC-140

< DTC/CIRCUIT DIAGNOSIS >

[HEATER AND VENTILATION]

BLOWER MOTOR

YES

>> GO TO 6.

NO

>> Repair the harness or connector.

6.

CHECK VOLTAGE BETWEEN BLOWER FAN RESISTOR AND GROUND

1.

Disconnect the blower fan resistor connector.

2.

Turn the ignition switch ON.

3.

Check voltage between blower fan resistor harness connector and the ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair the harness or connector between blower fan resistor and blower motor.

7.

CHECK BLOWER FAN RESISTOR

1.

Turn the ignition switch OFF.

2.

Perform the component inspection of blower fan resistor. Refer to 

HAC-140, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace the blower fan resistor.

8.

CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL AND BLOWER FAN RESISTOR

Check continuity between heater control harness connector and blower fan resistor.

Is the inspection result normal?

YES

>> Replace heater control.

NO

>> Repair the harness or connector.

Component Inspection

INFOID:0000000006024176

BLOWER MOTOR

1.

CHECK BLOWER MOTOR

1.

Remove the blower motor. Refer to 

XX-XX, "*****"

. 

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 the blower motor.

2.

CHECK BLOWER MOTOR

Check that there is not breakage or damage in the blower motor. 
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the blower motor.

3.

CHECK BLOWER MOTOR

Check that the blower motor turns smoothly. 
Is the inspection result normal?

(+)

(

−

)

Voltage

(Approx.)

Blower fan resistor

—

Connector

Terminal

M104

1

Ground

12 V

Heater control

Blower fan resistor

Continuity

Connector

Terminal

Connector

Terminal

M28

2

M104

2

Existed

3

3

4

4

BLOWER MOTOR

HAC-141

< DTC/CIRCUIT DIAGNOSIS >

[HEATER AND VENTILATION]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

YES

>> INSPECTION END

NO

>> Replace the blower motor.

BLOWER RELAY

1.

CHECK MOTOR RELAY

1.

Remove the blower relay. Refer to 

XX-XX, "*****"

. 

2.

Check the continuity between the 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 the blower relay.

BLOWER FAN RESISTOR

1.

CHECK BLOWER MOTOR

1.

Turn the ignition switch OFF. 

2.

Disconnect the blower fan resistor connector.

3.

Check the resistance between the blower fan resistor terminals. Refer to the applicable table for the nor-
mal value.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the blower fan resistor.

Blower relay

Voltage

Continuity

Terminal

3

5

ON

Existed

OFF

Not existed

JSIIA1551ZZ

Blower fan resistor

Resistance: 

Ω

(Approx.)

Terminal

1

2

0.43

3

1.03

4

3