Nissan Tiida C11. Manual - part 864

 

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Nissan Tiida C11. Manual - part 864

 

 

HAC-120

< COMPONENT DIAGNOSIS >

[AUTO AIR CONDITIONER (W/O NAVI)]

BLOWER MOTOR CONTROL SYSTEM

YES

>> GO TO 7.

NO

>> Repair as necessary.

7.

 CHECK INTAKE SENSOR CIRCUIT

Perform diagnostic procedure for the intake sensor circuit. Refer to 

HAC-139, "Intake Sensor Diagnosis Pro-

cedure"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair as necessary.

8.

 RECHECK FOR SYMPTOMS 

Perform a complete operational check and check for any symptoms. Refer to 

HAC-87, "Operational Check"

.

Does another symptom exist?

YES

>> Repair as necessary.

NO

>> Replace front air control. Refer to .

Front Blower Motor Diagnosis Procedure

INFOID:0000000001547419

SYMPTOM: Front blower motor operation is malfunctioning.

DIAGNOSTIC PROCEDURE FOR BLOWER MOTOR

SYMPTOM: Front blower motor operation is malfunctioning.

1.

CHECK POWER SUPPLY FOR FRONT BLOWER MOTOR

1.

Disconnect front blower motor connector M62.

2.

Turn ignition switch ON.

3.

Check voltage between front blower motor harness connector
M62 terminal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>>

Check power supply circuit and 15A fuses [Nos. 15 and 17, located in the fuse block (J/B)].

• If fuses are OK, check harness for open circuit. Repair or replace if necessary.
• If fuses are NG, replace fuse and check harness for short circuit. Repair or replace if necessary.

2.

CHECK CIRCUIT POWER SUPPLY FOR VARIABLE BLOWER CONTROL

AWIIA0298GB

Terminals

Voltage

(Approx.)

(+)

(

)

Connector

Terminal 

Ground

Front blower motor: 

M62

1

Battery voltage

SJIA0794E

BLOWER MOTOR CONTROL SYSTEM

HAC-121

< COMPONENT DIAGNOSIS >

[AUTO AIR CONDITIONER (W/O NAVI)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

1.

Turn ignition switch OFF.

2.

Connect front blower motor connector M62.

3.

Disconnect variable blower control connectors M90, M91.

4.

Turn ignition switch ON.

5.

Check voltage between variable blower control harness connec-
tor M91 (A) terminal 1, M90 (B) terminal 6 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> • Terminal 1 - Ground: Repair harness or connector.

• Terminal 6 - Ground: GO TO 5.

3.

CHECK GROUND CIRCUIT FOR VARIABLE BLOWER CONTROL

1.

Turn ignition switch OFF.

2.

Check continuity between variable blower control harness con-
nector M91 terminal 2 and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK FOR FRONT AIR CONTROL OUTPUT

1.

Reconnect variable blower control connector M91.

2.

Turn ignition switch ON.

Terminals

Voltage

(Approx.)

(+)

(

)

Connector

Terminal 

A

Variable blower con-

trol: M91

1

Ground

Battery voltage

B

Variable blower con-

trol: M90

6

AWIIA0286ZZ

Connector

Terminal

Ground

Continuity

Variable blower control: 

M91

2

Yes

AWIIA0299ZZ

AWIIA0300ZZ

HAC-122

< COMPONENT DIAGNOSIS >

[AUTO AIR CONDITIONER (W/O NAVI)]

BLOWER MOTOR CONTROL SYSTEM

3.

Change the blower motor speed from Lo to Hi, and confirm the duty ratios between variable blower control
harness connector M90 terminal 4 and ground using an oscilloscope. Usual terminal 4 drive signal duty
ratios are shown in the table below.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> • Blower motor speed is stuck at speed 4: GO TO 7.

• Blower motor speed is stuck at speed 1: GO TO 8.

5.

CHECK FRONT BLOWER MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect front blower motor connector M62.

3.

Check continuity between front blower motor terminals.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace front blower motor. Refer to XX.

6.

CHECK CIRCUIT CONTINUITY BETWEEN FRONT BLOWER MOTOR AND VARIABLE BLOWER CON-

TROL

Check continuity between front blower motor harness connector
M62 (A) terminal 2 and variable blower control harness connector
M90 (B) terminal 6. 

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair harness or connector.

7.

CHECK CIRCUIT CONTINUITY BETWEEN FRONT AIR CONTROL AND VARIABLE BLOWER CONTROL

AWIIA0488ZZ

Terminal

Continuity

1

2

Yes

SJIA0798E

A

B

Continuity

Connector

Terminal

Connector

Terminal

Front blower mo-

tor: M62

2

Variable blower 

control: M90

6

Yes

AWIIA0302ZZ

BLOWER MOTOR CONTROL SYSTEM

HAC-123

< COMPONENT DIAGNOSIS >

[AUTO AIR CONDITIONER (W/O NAVI)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

1.

Turn ignition switch OFF.

2.

Disconnect front air control connector M50.

3.

Check continuity between front air control harness connector
M33 (A) terminal 15 and variable blower control harness con-
nector M64 (B) terminal 8.

Is the inspection result normal?

YES

>> Replace variable blower control Refer to XX.

NO

>> Repair harness or connector.

8.

CHECK FOR FRONT AIR CONTROL OUT PUT 2

1.

Turn ignition switch OFF.

2.

Disconnect front air control connector M50.

3.

Turn ignition switch ON.

4.

Check output signal between front air control harness connector
M50 terminal 15 and ground. 

Is the inspection result normal?

YES

>> Replace front air control. Refer to XX.

NO

>> Replace variable blower control. Refer to XX.

Front Blower Motor Component Inspection

INFOID:0000000001547420

COMPONENT INSPECTION

Blower Motor

Confirm smooth rotation of the blower motor (1).
• Ensure that there are no foreign particles inside the A/C unit

assembly.

A

B

Continuity

Connector

Terminal

Connector

Terminal

Front air control: 

M50

15

Variable blower 

control: M90

4

Yes

AWIIA0303ZZ

Terminals

Condition

Voltage

(Approx.)

(+)

(

)

Connector

Terminal 

Ground

Front air 

control: 

M50

15

Blower mo-

tor speed: 

1st 

SJIA0801E

ZJIA0863J

SJIA0735E

 

 

 

 

 

 

 

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