Nissan Leaf. Manual - part 779

 

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Nissan Leaf. Manual - part 779

 

 

B27B4 ELECTRIC COMPRESSOR

HAC-119

< 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

B27B4 ELECTRIC COMPRESSOR

DTC Logic

INFOID:0000000010121829

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

4. Check DTC.
Is DTC detected?

YES

>> Refer to 

HAC-119, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010121830

Regarding Wiring Diagram information, refer to 

HAC-61, "Wiring Diagram"

.

1.

CHECK ELECTRIC COMPRESSOR POWER SUPPLY CIRCUIT FOR OPEN

1. Turn power switch OFF

2. Disconnect electric compressor connector.

3. Remove A/C relay

4. Check continuity between electric compressor harness connector and A/C relay harness connector.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK ELECTRIC COMPRESSOR POWER SUPPLY CIRCUIT FOR SHORT

Check continuity between electric compressor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK ELECTRIC COMPRESSOR GROUND CIRCUIT FOR OPEN

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B27B4

COMP LO VOL SYS

Voltage of battery power supply input to electric 
compressor is 9 V or less or 17 V or more.

• Electric compressor
• A/C relay system
• Harness or connectors

(Electric compressor circuit is open 
or shorted.)

Electric compressor

A/C relay

Continuity

Connector

Terminal

Connector

Terminal

F20

7

E52

5

Yes

Electric compressor

Continuity

Connector

Terminal

F20

7

Ground

No

HAC-120

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITH HEAT PUMP)]

B27B4 ELECTRIC COMPRESSOR

Check continuity between electric compressor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK A/C RELAY

Check A/C relay. Refer to 

EVC-385, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace electric compressor. Refer to 

HA-37, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning components.

Electric compressor

Continuity

Connector

Terminal

F20

8

Ground

Yes

B27B5, 27B6, B27B7, B27BA, B27BE ELECTRIC COMPRESSOR

HAC-121

< 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

B27B5, 27B6, B27B7, B27BA, B27BE ELECTRIC COMPRESSOR

DTC Logic

INFOID:0000000010121831

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-121, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010121832

1.

REPLACE ELECTRIC COMPRESSOR

Replace electric compressor. Refer to 

HA-37, "Removal and Installation"

.

>> Inspection End.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B27B5

COMP INTNL CIRC

When overcurrent is detected in inverter.

Electric compressor

B27B6

COMP INTNL CIRC

When open circuit is detected in inverter.

B27B7

COMP CURNT SENS

When inverter is OFF, the detected current val-
ue in inverter is the standard value or more.

B27BA

COMP SYSTEM

When the internal system malfunction stop oc-
curs repeatedly.

B27BE

COMP INTNL SYS

When a malfunction is detected in the CPU, 
ROM or RAM of the inverter.

HAC-122

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITH HEAT PUMP)]

B27B8 ELECTRIC COMPRESSOR

B27B8 ELECTRIC COMPRESSOR

DTC Logic

INFOID:0000000010121833

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-122, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010121834

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 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 5.

NO

>> Repair or replace malfunctioning components.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B27B8

COMP OVER LOADED

When the high load status at low speed of elec-
tric compressor is continued.

• Refrigerant leakage
• Cooling fan
• Refrigerant insufficient or overfilled
• Li-ion battery
• PDM (power delivery module)
• Electric compressor

 

 

 

 

 

 

 

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