Nissan Leaf. Manual - part 783

B27C0 ELECTRIC COMPRESSOR

HAC-135

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITH HEAT PUMP)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK PDM (POWER DELIVERY MODULE)

Check PDM (power delivery module). Refer to 

EVC-125, "Work Flow"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace malfunctioning components.

5.

CHECK ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS POWER SUPPLY CIRCUIT FOR OPEN

1. Disconnect electric compressor and Li-ion battery connector.

2. Check continuity between electric compressor high voltage harness connector and Li-ion battery high volt-

age harness connector.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace high voltage harness between electric compressor and PDM (power delivery module),

and between PDM (power delivery module) and Li-ion battery.

6.

CHECK ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS GROUND CIRCUIT

Check continuity between electric compressor high voltage harness connector and Li-ion battery high voltage

harness connector.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace high voltage harness between electric compressor and PDM (power delivery module),

and between PDM (power delivery module) and Li-ion battery.

7.

CHECK A/C AUTO AMP.

With CONSULT

1. Reconnect all harness connectors disconnected.

2. Set the vehicle to READY.

3. Using CONSULT, perform “MODE1” of “HVAC TEST” in “Active Test” of “HVAC”. Refer to 

HAC-47, "CON-

SULT Function"

.

4. Check that the electric compressor operates normally.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace A/C auto amp. Refer to 

HAC-187, "Removal and Installation"

. Then GO TO 8.

8.

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC confirmation procedure. Refer to 

HAC-133, "DTC Logic"

.

Is DTC B27C0 detected?

YES

>> Replace electric compressor. Refer to 

HA-37, "Removal and Installation"

.

Electric compressor

Ground

Continuity

Connector

Terminal

F20

5

No

Electric compressor

Li-ion battery

Continuity

Connector

Terminal

Connector

Terminal

H2

2

H3

37

Yes

Electric compressor

Li-ion battery

Continuity

Connector

Terminal

Connector

Terminal

H2

1

H3

38

Yes

HAC-136

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITH HEAT PUMP)]

B27C0 ELECTRIC COMPRESSOR

NO

>> Inspection End.

B27CC, B27CD ELECTRIC COMPRESSOR

HAC-137

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITH HEAT PUMP)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

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B27CC, B27CD ELECTRIC COMPRESSOR

DTC Logic

INFOID:0000000010121844

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Turn power switch OFF.

2. Set the vehicle to READY.

3. Operate the automatic air conditioning system.

4. Set the temperature to full cold and wait at least 2 seconds.

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

6. Check DTC.
Is DTC detected?

YES

>> Refer to 

HAC-137, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010121845

1.

CHECK LI-ION BATTERY

1. Connect 12V battery negative terminal.

2. Check Li-ion battery. Refer to 

EVB-69, "Work Flow"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning components.

2.

CHECK REFRIGERANT FOR LEAKAGES

Check refrigerant for leakages. Refer to 

HA-26, "Check Refrigerant Leakage"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning components.

3.

CHECK COOLING FAN OPERATION

1. Set the vehicle to READY.

2. Operate the automatic air conditioning system.

3. Check that the cooling fan is operating.
Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Check cooling fan. Refer to 

EVC-367, "Component Function Check"

.

4.

CHECK REFRIGERANT CYCLE

Check refrigerant cycle. Refer to 

HA-31, "Inspection"

.

Is the inspection result normal?

YES

>> Replace electric compressor. Refer to 

HA-37, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning components.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B27CC

COMP VOL LIMIT

When the command speed control is disabled 
due to voltage decrease of high voltage system.

• Li-ion battery
• Refrigerant leakage
• Cooling fan
• Refrigerant insufficient or overfilled
• Electric compressor

B27CD

COMP MTR CURRNT LMT

When the command speed control is disabled 
due to decrease of motor upper limit.

HAC-138

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITH HEAT PUMP)]

B27CE ELECTRIC COMPRESSOR

B27CE ELECTRIC COMPRESSOR

DTC Logic

INFOID:0000000010121846

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Turn power switch OFF.

2. Set the vehicle to READY.

3. Operate the automatic air conditioning system.

4. Set the temperature to full cold and wait at least 2 seconds.

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

6. Check DTC.
Is DTC detected?

YES

>> Refer to 

HAC-138, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010121847

1.

CHECK REFRIGERANT FOR LEAKAGES

Check refrigerant for leakages. Refer to 

HA-26, "Check Refrigerant Leakage"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning components.

2.

CHECK COOLING FAN OPERATION

1. Set the vehicle to READY.

2. Operate the automatic air conditioning system.

3. Check that the cooling fan is operating.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check cooling fan. Refer to 

EVC-367, "Component Function Check"

.

3.

CHECK REFRIGERANT CYCLE

Check refrigerant cycle. Refer to 

HA-31, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace malfunctioning components.

4.

CHECK AIR CONDITIONING SYSTEM BY RE-FILLING REFRIGERANT

1. Collect refrigerant, and charge the air conditioning system from a new service can with the specified

amount refrigerant.

2. After operate air conditioning system 15 minutes or more, perform DTC confirmation procedure, and

check that DTC [B27CE] is not detected.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace electric compressor. Refer to 

HA-37, "Removal and Installation"

.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B27CE

COMP OVERHEAT

When the inverter temperature exceeds the 
standard value.

• Electric compressor
• Cooling fan
• Refrigerant leakage
• Refrigerant insufficient