Nissan Leaf. Manual - part 828

B2791 ELECTRIC COMPRESSOR

HAC-315

< 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

Check PDM (power delivery module). Refer to 

EVC-125, "Work Flow"

.

Is the inspection result normal?

YES

>> Replace electric compressor. Refer to 

HA-95, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning components.

HAC-316

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITHOUT HEAT PUMP)]

B27A0, B27A1 INTAKE DOOR MOTOR

B27A0, B27A1 INTAKE DOOR MOTOR

DTC Logic

INFOID:0000000010122026

DTC DETECTION LOGIC 

NOTE:

• If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to 

HAC-

278, "DTC Logic"

.

• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. 

HAC-279,

"DTC Logic"

.

*: A/C auto amp. operates intake door motor according to target value of PBR opening angle at 40% when per-

forming self-diagnosis.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Set the vehicle to READY.

2. Select “Self Diagnostic Result” of “HVAC” using CONSULT.

3. Check DTC.
Is DTC detected?

YES

>> Refer to 

HAC-316, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010122027

Regarding Wiring Diagram information, refer to 

HAC-253, "Wiring Diagram"

.

1.

CHECK INTAKE DOOR MOTOR OPERATION

1. Turn power switch ON.

2. Operate intake switch and check by operation sound that intake door motor operates.
Does the intake door motor operate?

YES

>> GO TO 2.

NO

>> GO TO 8.

2.

CHECK INTAKE DOOR MOTOR PBR POWER SUPPLY

1. Disconnect intake door motor connector.

2. Turn power switch ON.

3. Check voltage between intake door motor harness connector and ground.

Is the inspection result normal?

DTC

Items

(CONSULT screen terms)

DTC detection condition

*

Possible cause

B27A0

INTAKE DOOR MOTOR

PBR opening angle of intake door motor is 50% 
or more (PBR feedback signal voltage of intake 
door motor is 2.5 V or more).

• Intake door motor
• Intake door motor system installa-

tion condition

• A/C auto amp.
• Harness or connectors

(The motor circuit is open or short-
ed.)

B27A1

PBR opening angle of intake door motor is 30% 
or less (PBR feedback signal voltage of intake 
door motor is 1.5 V or less).

+

−

Voltage

(Approx.)

Intake door motor

Connector

Terminal

M54

1

Ground

5 V

B27A0, B27A1 INTAKE DOOR MOTOR

HAC-317

< 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

YES

>> GO TO 3.

NO

>> GO TO 7.

3.

CHECK INTAKE DOOR MOTOR PBR GROUND CIRCUIT FOR OPEN

1. Turn power switch OFF.

2. Disconnect A/C auto amp. connector.

3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK INTAKE DOOR MOTOR PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN

Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK INTAKE DOOR MOTOR PBR FEEDBACK SIGNAL CIRCUIT FOR SHORT

Check continuity between intake door motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK INTAKE DOOR MOTOR PBR

Check intake door motor PBR. Refer to 

HAC-318, "Component Inspection (PBR)"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-347, "Removal and Installation"

.

NO

>> Replace intake door motor. Refer to 

HAC-362, "INTAKE DOOR MOTOR : Removal and Installa-

tion"

.

7.

CHECK INTAKE DOOR MOTOR PBR POWER SUPPLY CIRCUIT FOR OPEN

1. Turn power switch OFF.

2. Disconnect A/C auto amp. connector.

3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-347, "Removal and Installation"

.

NO

>> Repair harness or connector.

Intake door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M54

3

M55

30

Yes

Intake door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M54

2

M55

38

Yes

Intake door motor

—

Continuity

Connector

Terminal

M54

2

Ground

No

Intake door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M54

1

M55

27

Yes

HAC-318

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITHOUT HEAT PUMP)]

B27A0, B27A1 INTAKE DOOR MOTOR

8.

CHECK INTAKE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN

1. Turn power switch OFF.

2. Disconnect intake door motor connector, and A/C auto amp. connector.

3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair harness or connector.

9.

CHECK INTAKE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT

Check continuity between intake door motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair harness or connector.

10.

CHECK INTAKE DOOR MOTOR 

1. Turn power switch OFF.

2. Check intake door motor. Refer to 

HAC-319, "Component Inspection (Motor)"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Replace intake door motor. Refer to 

HAC-362, "INTAKE DOOR MOTOR : Removal and Installa-

tion"

.

11.

CHECK INSTALLATION OF INTAKE DOOR MOTOR SYSTEM

Check intake door motor system is properly installed. Refer to 

HAC-203, "Exploded View"

.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-347, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning components.

Component Inspection (PBR)

INFOID:0000000010122028

1.

CHECK INTAKE DOOR MOTOR PBR

Check resistance between intake door motor terminals.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace intake door motor. Refer to 

HAC-204, "INTAKE DOOR MOTOR : Removal and Installa-

tion"

.

Intake door motor

A/C auto amp.

Continuity

Connector

Terminal

Connector

Terminal

M54

5

M55

21

Yes

6

1

Intake door motor

—

Continuity

Connector

Terminal

M54

5

Ground

No

6

Terminal

Resistance (

Ω)

1

2

Except 0 or 

∞

3