Nissan Leaf. Manual - part 833

 

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Nissan Leaf. Manual - part 833

 

 

BLOWER MOTOR

HAC-335

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITHOUT HEAT PUMP)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

BLOWER MOTOR

Component Function Check

INFOID:0000000010122045

1.

CHECK BLOWER MOTOR

With CONSULT

1. Turn power switch OFF.

2. Set the vehicle to READY.

3. Using CONSULT, perform “HVAC TEST” in “Active Test” of “HVAC”. Refer to 

HAC-242, "CONSULT Func-

tion"

.

4. When the test items are being conducted, check that the blower motor operates normally for each mode.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Refer to 

HAC-335, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010122046

Regarding Wiring Diagram information, refer to 

HAC-253, "Wiring Diagram"

.

1.

CHECK FUSE

1. Turn power switch OFF.

2. Check 15A fuses [Nos. 14 and 16, located in fuse block (J/B)].

NOTE:

Refer to 

PG-78, "Terminal Arrangement"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected.

2.

CHECK BLOWER MOTOR POWER SUPPLY

1. Disconnect blower motor connector. 

2. Turn power switch ON.

3. Check voltage between blower motor harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK BLOWER RELAY

1. Turn power switch OFF.

2. Check blower relay. Refer to 

HAC-338, "Component Inspection (Blower Relay)"

.

Is the inspection result normal?

YES

>> Repair harness or connector between blower motor and fuse.

NO

>> Replace blower relay.

4.

CHECK BLOWER MOTOR CONTROL CIRCUIT

1. Turn power switch OFF.

2. Connect blower motor connector.

3. Disconnect power transistor connector.

4. Turn power switch ON.

5. Check voltage between power transistor harness connector and ground.

+

Voltage

(Approx.)

Blower motor

Connector

Terminal

M39

1

Ground

Battery voltage

HAC-336

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITHOUT HEAT PUMP)]

BLOWER MOTOR

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

CHECK BLOWER MOTOR CONTROL CIRCUIT FOR OPEN

1. Turn power switch OFF.

2. Disconnect blower motor connector.

3. Check continuity between power transistor harness connector and blower motor harness connector. 

Is the inspection result normal?

YES

>> Replace blower motor. Refer to 

VTL-22, "Removal and Installation"

.

NO

>> Repair harness or connector.

6.

CHECK POWER TRANSISTOR POWER SWITCH POWER SUPPLY

Check voltage between power transistor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair harness or connector between power transistor and fuse.

7.

CHECK POWER TRANSISTOR GROUND CIRCUIT FOR OPEN

1. Turn power switch OFF.

2. Check continuity between power transistor harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair harness or connector.

8.

CHECK POWER TRANSISTOR CONTROL SIGNAL

1. Connect blower motor connector and A/C auto amp. connector. 

2. Turn power switch ON.

3. Set air outlet to VENT. 

4. Change fan speed from 1st – 7th, and check duty ratios between blower motor harness connector and

ground by using an oscilloscope. 

NOTE:

Calculate the drive signal duty ratio as shown in the figure.

T2 = Approx. 1.6 ms

+

Voltage

(Approx.)

Power transistor

Connector

Terminal

M144

1

Ground

Battery voltage

Power transistor

Blower motor

Continuity

Connector

Terminal

Connector

Terminal

M144

1

M39

2

Yes

+

Voltage

(Approx.)

Power transistor

Connector

Terminal

M144

3

Ground

Battery voltage

Power transistor

Continuity

Connector

Terminal

M144

4

Ground

Yes

BLOWER MOTOR

HAC-337

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITHOUT HEAT PUMP)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Is the inspection result normal?

YES

>> Replace power transistor. Refer to 

HAC-357, "Removal and Installation"

.

NO

>> GO TO 9.

9.

CHECK POWER TRANSISTOR CONTROL SIGNAL CIRCUIT FOR OPEN

1. Turn power switch OFF.

2. Disconnect power transistor connector and A/C auto amp. connector.

3. Check continuity between power transistor harness connector and A/C auto amp. harness connector. 

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair harness or connector.

10.

CHECK POWER TRANSISTOR CONTROL SIGNAL CIRCUIT FOR SHORT

Check continuity between power transistor harness connector and ground. 

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-347, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection (Blower Motor)

INFOID:0000000010122047

1.

CHECK BLOWER MOTOR

1. Remove blower motor. Refer to 

VTL-22, "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-22, "Removal and Installation"

.

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 blower motor. Refer to 

VTL-22, "Removal and Installation"

.

+

Condition

Duty ratio

(Approx.)

Output waveform

Power transistor

Connector

Terminal

Fan speed (manual) 

Air outlet: VENT

M144

2

Ground

1st

26%

2nd

34%

3rd

41%

4th

51%

5th

62%

6th

73%

7th

82%

JPIIA1646GB

Power transistor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M144

2

M55

12

Yes

Power transistor

Continuity

Connector

Terminal

M144

2

Ground

No

HAC-338

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITHOUT HEAT PUMP)]

BLOWER MOTOR

3.

CHECK BLOWER MOTOR

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

YES

>> Inspection End.

NO

>> Replace blower motor. Refer to 

VTL-22, "Removal and Installation"

.

Component Inspection (Blower Relay)

INFOID:0000000010122048

1.

CHECK BLOWER RELAY

1. Remove blower relay. Refer to 

PG-78, "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.

Terminal

Voltage

Continuity

3

5

ON

Yes

OFF

No

JSIIA1551ZZ

 

 

 

 

 

 

 

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