Nissan Leaf. Manual - part 781

 

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Nissan Leaf. Manual - part 781

 

 

B27BC ELECTRIC COMPRESSOR

HAC-127

< 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” on “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-125, "DTC Logic"

.

Is DTC B27BC 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-128

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITH HEAT PUMP)]

B27BC ELECTRIC COMPRESSOR

NO

>> Inspection End.

B27BF ELECTRIC COMPRESSOR

HAC-129

< 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

B27BF ELECTRIC COMPRESSOR

DTC Logic

INFOID:0000000010121839

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-129, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010121840

DANGER:

Since hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of

electric shock, electric leakage, or similar accidents if the high voltage component and vehicle are

handled incorrectly. Be sure to follow the correct work procedures when performing inspection and

maintenance.

WARNING:

• Be sure to remove the service plug in order to disconnect the high voltage circuits before perform-

ing inspection or maintenance of high voltage system harnesses and parts.

• The removed service plug must always be carried in a pocket of the responsible worker or placed in

the tool box during the procedure to prevent the plug from being connected by mistake.

• Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses

before beginning work on the high voltage system.

• Never allow workers other than the responsible person to touch the vehicle containing high voltage

parts. To keep others from touching the high voltage parts, these parts must be covered with an insu-

lating sheet except when using them.

• Refer to 

GI-34, "High Voltage Precautions"

.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise

instructed in the Service Manual. A malfunction may occur if this is not observed.

1.

PRECONDITIONING

WARNING:

Disconnect the high voltage. Refer to 

GI-33, "How to Disconnect High Voltage"

.

Check voltage in high voltage circuit. (Check that condenser are discharged.)

1. Lift up the vehicle and remove the Li-ion battery under covers. Refer to 

EVB-181, "Exploded View"

.

2. Disconnect high voltage harness connector and PTC heater harness connector from front side of Li-ion

battery. Refer to 

EVB-181, "Removal and Installation"

.

DTC

Items

(CONSULT screen terms)

DTC detection condition

Possible cause

B27BF

COMP INTNL CIRC

When HVIL open circuit is detected in electric 
compressor system.

• High voltage harness connector 

connecting malfunction

• High voltage harness connector
• Electric compressor

HAC-130

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITH HEAT PUMP)]

B27BF ELECTRIC COMPRESSOR

3. Measure voltage between high voltage harness connector terminals and PTC heater harness connector

terminals.

DANGER:

 

 Touching high voltage components without using the appropriate protective equipment will

cause electrocution.

CAUTION:

For voltage measurements, use a tester which can measure to 500 V or higher.

>> GO TO 2.

2.

CHECK THE CONNECTION STATUS OF THE ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS

CONNECTOR
1. Disconnect the cable from the negative terminal of the 12V battery. Refer to 

HAC-11, "Precaution for

Removing 12V Battery"

.

2. Check that the high voltage harness connector of electric compressor is connected normally.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Reconnect the high voltage harness connector. If reconnecting is impossible due to high voltage

harness connector malfunction, replace the high voltage harness between electric compressor

and PDM (Power Delivery Module).

3.

CHECK THE ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS CONNECTOR

1. Disconnect the electric compressor high voltage harness connector.

2. Check for any adhering foreign substances, cracking, or damage on the high voltage harness connector

terminal of electric compressor.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace the high voltage harness between electric compressor and PDM (power delivery mod-

ules).

4.

CHECK THE HVIL CIRCUIT OF THE ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS CONNEC-

TOR
Check for continuity between HVIL circuit terminals of electric compressor vehicle side high voltage harness

connector. Refer to 

HAC-131, "Component Inspection"

.

Is the inspection result normal?

YES

>> Replace electric compressor. Refer to 

HA-37, "Removal and Installation"

.

NO

>> Replace the high voltage harness between electric compressor and PDM (power delivery mod-

ule).

Standard

: 5 V or less 

JPCIA0296ZZ

 

 

 

 

 

 

 

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