Nissan Leaf. Manual - part 794

ELECTRIC COMPRESSOR INSULATION RESISTANCE CHECK

HAC-179

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITH HEAT PUMP)]

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HAC

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ELECTRIC COMPRESSOR INSULATION RESISTANCE CHECK

Component Inspection

INFOID:0000000010121883

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.

DIAGNOSIS PROCEDURE

CAUTION:

Erase DTC after the work is completed.

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"

.

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.

Standard

: 5 V or less 

JPCIA0296ZZ

HAC-180

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITH HEAT PUMP)]

ELECTRIC COMPRESSOR INSULATION RESISTANCE CHECK

>> GO TO 2.

2.

CHECK ELECTRIC COMPRESSOR INSULATION RESISTANCE 

1. Disconnect high voltage harness connector from electric compressor.

2. Check the insulation resistance of the electric compressor with

an insulation resistance tester.

CAUTION:

• Unlike the ordinary tester, the insulation resistance tester

applies 500V when measuring. If used incorrectly, there is

the danger of electric shock. If used in the vehicle 12V

system, there is the danger of damage to electronic

devices. Read the insulation resistance tester instruction

manual carefully and be sure to work safely.

• Use 500V range of insulation resistance tester to measure

insulation resistance. Wait for 30 seconds until the value

becomes stable.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace electric compressor. Refer to 

HA-37, "Removal

and Installation"

.

+

−

Resistance

Electric compressor

Terminal

1

Aluminum part on side 

of electric compressor

3 M

Ω or more

2

JMIIA2755ZZ

PTC HEATER INSPECTION RESISTANCE CHECK

HAC-181

< 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

PTC HEATER INSPECTION RESISTANCE CHECK

Component Inspection

INFOID:0000000010121884

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.

Regarding Wiring Diagram information, refer to 

HAC-61, "Wiring Diagram"

.

DIAGNOSIS PROCEDURE

CAUTION:

Erase DTC after the work is completed.

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"

.

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.

JPCIA0296ZZ

HAC-182

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITH HEAT PUMP)]

PTC HEATER INSPECTION RESISTANCE CHECK

CAUTION:

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

>> GO TO 2.

2.

CHECK PTC HEATER INSULATION RESISTANCE 

1. Disconnect 12V battery negative terminal. Refer to 

HAC-11, "Precaution for Removing 12V Battery"

.

2. Disconnect high voltage harness connector from Li-ion battery.

3. Check the insulation resistance of the PTC heater with an insu-

lation resistance tester.

CAUTION:

• Unlike the ordinary tester, the insulation resistance tester

applies 500V when measuring. If used incorrectly, there is

the danger of electric shock. If used in the vehicle 12V

system, there is the danger of damage to electronic

devices. Read the insulation resistance tester instruction

manual carefully and be sure to work safely.

• Use 500V range of insulation resistance tester to measure

insulation resistance. Wait for 30 seconds until the value

becomes stable.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace PTC heater. Refer to 

HAC-201, "Removal and

Installation"

.

Standard

: 5 V or less 

+

−

Resistance

Li-ion battery

Connector

Terminal

H19

40

Bonding wire 

fixed portion

1 M

Ω or more

41

JMIIA2756ZZ