Nissan Leaf. Manual - part 825

B2785, B2786 ELECTRIC COMPRESSOR

HAC-303

< 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 electric compressor. Refer to 

HA-95, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning parts.

HAC-304

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITHOUT HEAT PUMP)]

B2787 ELECTRIC COMPRESSOR

B2787 ELECTRIC COMPRESSOR

DTC Logic

INFOID:0000000010122014

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-304, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010122015

1.

CHECK LI-ION BATTERY

Check Li-ion battery. Refer to 

EVB-69, "Work Flow"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning parts.

2.

CHECK REFRIGERANT FOR LEAKAGES

Check refrigerant for leakages. Refer to 

HA-84, "Check Refrigerant Leakage"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning parts.

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-89, "Inspection"

.

Is the inspection result normal?

YES

>> Replace electric compressor. Refer to 

HA-95, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning parts.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B2787

COMP VOLTAGE SATURA-
TION

When the motor voltage 140% or more relative 
to the inverter output voltage.

• Li-ion battery
• Electric compressor

(Discharge pressure increase)

• Cooling fan
• Overfilled refrigerant

B2788 ELECTRIC COMPRESSOR

HAC-305

< 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

B2788 ELECTRIC COMPRESSOR

DTC Logic

INFOID:0000000010122016

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-305, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010122017

1.

CHECK REFRIGERANT FOR LEAKAGES

Check refrigerant for leakages. Refer to 

HA-84, "Check Refrigerant Leakage"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning parts.

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 ELECTRIC COMPRESSOR OPERATION

Check electric compressor operation.
Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace electric compressor. Refer to 

HA-95, "Removal and Installation"

.

4.

CHECK REFRIGERANT CYCLE

Check refrigerant cycle. Refer to 

HA-89, "Inspection"

.

Is the inspection result normal?

YES

>> Replace electric compressor. Refer to 

HA-95, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning parts.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B2788

COMP OVER CURRENT

When the electric compressor is not operated 
under the following conditions:
• Within 90 seconds after starting
• Motor current is 35.1 A or more
• 3 times in a 5 second interval

• Electric compressor

(Discharge pressure increase)
(Inverter internal short-circuit)
(Stuck compressor)

• Cooling fan

HAC-306

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITHOUT HEAT PUMP)]

B2789 ELECTRIC COMPRESSOR

B2789 ELECTRIC COMPRESSOR

DTC Logic

INFOID:0000000010122018

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-306, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010122019

1.

CHECK REFRIGERANT FOR LEAKAGES

Check refrigerant for leakages. Refer to 

HA-84, "Check Refrigerant Leakage"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning parts.

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-89, "Inspection"

.

Is the inspection result normal?

YES

>> Replace electric compressor. Refer to 

HA-95, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning parts.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B2789

COMP OVER LOADED

When a current of 13.5 A or more is input to the 
electric compressor.

• Electric compressor

(Discharge pressure increase)

• Cooling fan