Nissan Leaf. Manual - part 834

ELECTRIC COMPRESSOR INSULATION RESISTANCE CHECK

HAC-339

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITHOUT HEAT PUMP)]

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ELECTRIC COMPRESSOR INSULATION RESISTANCE CHECK

Component Inspection

INFOID:0000000010122049

WARNING:

• Because hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of elec-

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

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

maintenance.

• 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.

• To prevent the removed service plug from being connected by mistake during the procedure, always

carry it in your pocket or put it in the tool box.

• Be sure to wear insulating protective equipment before beginning work on the high voltage system.

• Clearly identify the persons responsible for high voltage work and ensure that other persons do not

touch the vehicle. When not working, cover high voltage parts with an insulating cover sheet or sim-

ilar item to prevent other persons from contacting them.

• Refer to 

GI-34, "High Voltage Precautions"

.

CAUTION:

There is the possibility of a malfunction occurring if the vehicle is changed to READY status while the

service plug is removed. Therefore do not change the vehicle to READY status unless instructed to do

so in the Service Manual.

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 connector from front side of Li-ion battery. Refer to 

EVB-181, "Removal and

Installation"

.

3. Measure voltage between high voltage harness 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 500V or higher.

>> GO TO 2.

2.

CHECK ELECTRIC COMPRESSOR INSULATION RESISTANCE 

1. Disconnect high voltage harness connector from electric compressor.

Standard

: 5 V or less 

JSAIA1362ZZ

HAC-340

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITHOUT HEAT PUMP)]

ELECTRIC COMPRESSOR INSULATION RESISTANCE CHECK

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-95, "Removal

and Installation"

.

+

−

Resistance

Electric compressor

Terminal

1

Aluminum part on side 

of electric compressor

1 M

Ω or more

3

JPIIA1868ZZ

PTC HEATER INSPECTION RESISTANCE CHECK

HAC-341

< 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

PTC HEATER INSPECTION RESISTANCE CHECK

Component Inspection

INFOID:0000000010122050

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-253, "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-342

< DTC/CIRCUIT DIAGNOSIS >

[AUTO A/C (WITHOUT 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-359, "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