Nissan Leaf. Manual - part 824

B2782 ELECTRIC COMPRESSOR

HAC-299

< 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

B2782 ELECTRIC COMPRESSOR

DTC Logic

INFOID:0000000010122008

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-299, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010122009

1.

REPLACE ELECTRIC COMPRESSOR

Replace electric compressor. Refer to 

HA-95, "Removal and Installation"

.

>> Inspection End.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B2782

COMP SHUNT SIGNAL 
OFFSET

When an error is detected in the shunt signal 
(current value in the A/C inverter).

Electric compressor

HAC-300

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITHOUT HEAT PUMP)]

B2783, B2784 ELECTRIC COMPRESSOR

B2783, B2784 ELECTRIC COMPRESSOR

DTC Logic

INFOID:0000000010122010

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-300, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010122011

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

>> GO TO 4.

NO

>> Repair or replace malfunctioning parts.

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 [B2783] or DTC [B2784] is not detected.

Is the inspection result normal?

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B2783

COMP DISCHARGE TEMP 
OVER HEAT

When the estimated refrigerant temperature 
discharged from the electric compressor 130

°C 

(266

°F) or more.

• Electric compressor

(Discharge pressure increase)

• Cooling fan
• Refrigerant leakage
• Refrigerant insufficient

B2784

COMP DISCHARGE TEMP 
LIMIT

When the estimated refrigerant temperature 
discharged from the electric compressor 110

°C 

(230

°F) or more.

B2783, B2784 ELECTRIC COMPRESSOR

HAC-301

< 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

>> Replace electric compressor. Refer to 

HA-95, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning parts.

HAC-302

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITHOUT HEAT PUMP)]

B2785, B2786 ELECTRIC COMPRESSOR

B2785, B2786 ELECTRIC COMPRESSOR

DTC Logic

INFOID:0000000010122012

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-302, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010122013

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

>> GO TO 4.

NO

>> Repair or replace malfunctioning parts.

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 [B2785] or DTC [B2786] is not detected.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B2785

COMP IPM OVER HEAT

• When the IPM temperature 125

°C (257°F) or 

more within 1 min. after starting the electric 
compressor.

• When the IPM temperature 88

°C (190°F) or 

more after 1 min. or longer after starting the 
electric compressor.

• Electric compressor

(Discharge pressure increase)

• Cooling fan
• Refrigerant leakage
• Refrigerant insufficient

B2786

COMP IPM DISCHARGE 
TEMP LIMIT

When the IPM temperature 83

°C (181°F) or 

more.