Nissan Leaf. Manual - part 472

LI-ION BATTERY INSULATION RESISTANCE LOSS CHECK

EVB-171

< DTC/CIRCUIT DIAGNOSIS >

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EVB

N

O

P

Is the inspection result normal?

YES

>> .Replace high voltage harness.

NO

>> GO TO 17.

17.

CHECK MODULE-5

1. Remove rear module stack. Refer to 

EVB-248, "REAR MODULE STACK : Disassembly and Assembly"

.

NOTE:

Do not disassemble module stack.

2. Measure voltages between terminal  /  of all modules in rear

module stack and module body.

Is the inspection result normal?

YES

>> GO TO 18.

NO

>> Replace malfunctioning module. Refer to 

EVB-248, "REAR MODULE STACK : Disassembly and

Assembly"

.

18.

CHECK MODULE-6

+

−

Voltage

Rear module stack

Terminal

, 

Battery pack ground

Approx. 0 V

JSCIA0744ZZ

JSCIA0740ZZ

+

−

Voltage

Module

Terminal

Module body

Approx. 0 V

EVB-172

< DTC/CIRCUIT DIAGNOSIS >

LI-ION BATTERY INSULATION RESISTANCE LOSS CHECK

Measure insulation resistance between terminal  /  of all modules

in rear module stack and module body.

WARNING:

Unlike the ordinary tester, the insulation resistance tester

applies 500 V 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.

CAUTION:

Be sure to set the insulation resistance tester to 500 V when

performing this test. Using a setting higher than 500 V can

result in damage to the component being inspected.

Is the inspection result normal?

YES-1 >> Replace or repair of malfunctioning part is not-yet performed: Replace Li-ion battery controller.

Refer to 

EVB-201, "LI-ION BATTERY CONTROLLER : Removal and Installation"

.

YES-2 >> Replace or repair of malfunctioning part is complete: INSPECTION END.

NO

>> Replace malfunctioning module. Refer to 

EVB-248, "REAR MODULE STACK : Disassembly and

Assembly"

.

+

−

resistance

Module

Terminal

Module body

100 M

Ω or more

JSCIA0740ZZ

LI-ION BATTERY HEATER SYSTEM INSULATION RESISTANCE CHECK

EVB-173

< DTC/CIRCUIT DIAGNOSIS >

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LI-ION BATTERY HEATER SYSTEM INSULATION RESISTANCE CHECK

Diagnosis Procedure

INFOID:0000000010121166

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 

EVB-7, "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"

.

1. Remove Li-ion battery. Refer to 

EVB-181, "Removal and Installation"

.

2. Remove battery pack upper case. Refer to 

EVB-191, "BATTERY PACK UPPER CASE : Removal and

Installation"

.

>> GO TO 2.

2.

CHECK HIGH VOLTAGE HARNESS

Check the harness shield between the heater relay unit and the Li-ion battery heater for scratches and cracks.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts and Li-ion battery controller.

3.

CHECK HEATER RELAY UNIT INSULATION RESISTANCE

WARNING:

Unlike the ordinary tester, the insulation resistance tester applies 500 V when measuring. If used

incorrectly, there is the danger of electric shock. If used in the vehicle 12 V system, there is the danger

of damage to electronic devices. Read the insulation resistance tester instruction manual carefully

and be sure to work safely.

1. Disconnect high voltage harness connector from heater relay unit.

NOTE:

Check the heater relay with it installed on the battery pack.

2. Use 500 V range of insulation resistance tester to measure insulation resistance. Wait for 30 seconds until

the value becomes stable.

CAUTION:

Be sure to set the insulation resistance tester to 500 V when performing this test. Using a setting

higher than 500 V can result in damage to the component being inspected.

EVB-174

< DTC/CIRCUIT DIAGNOSIS >

LI-ION BATTERY HEATER SYSTEM INSULATION RESISTANCE CHECK

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace heater relay unit and Li-ion battery controller.

4.

CHECK LI-ION BATTERY HEATER

WARNING:

Unlike the ordinary tester, the insulation resistance tester applies 500 V when measuring. If used

incorrectly, there is the danger of electric shock. If used in the vehicle 12 V system, there is the danger

of damage to electronic devices. Read the insulation resistance tester instruction manual carefully

and be sure to work safely.

1. Disconnect high voltage harness connector from Li-ion battery heater.

NOTE:

Check the heater relay with it installed on the battery pack.

2. Use 500 V range of insulation resistance tester to measure insulation resistance. Wait for 30 seconds until

the value becomes stable.

CAUTION:

Be sure to set the insulation resistance tester to 500 V when performing this test. Using a setting

higher than 500 V can result in damage to the component being inspected.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace corresponding Li-ion battery heater and Li-ion battery controller.

5.

CHECK HIGH VOLTAGE HARNESS INSULATION RESISTANCE

WARNING:

Unlike the ordinary tester, the insulation resistance tester applies 500 V when measuring. If used

incorrectly, there is the danger of electric shock. If used in the vehicle 12 V system, there is the danger

of damage to electronic devices. Read the insulation resistance tester instruction manual carefully

and be sure to work safely.

1. Use 500 V range of insulation resistance tester to measure insulation resistance. Wait for 30 seconds until

the value becomes stable.

CAUTION:

Be sure to set the insulation resistance tester to 500V when performing this test. Using a setting

higher than 500 V can result in damage to the component being inspected.

Heater relay unit

Ground

Resistance

Terminal

10

Battery pack lower case

1000 M

Ω or more

11

Li-ion battery heater

Ground

Resistance

Item

Connector

Terminal

LH1

LB19

1

Battery pack lower case

1000 M

Ω or more

2

LH2

LB20

1

1000 M

Ω or more

2

RH1

LB23

1

1000 M

Ω or more

2

RH2

LB24

1

1000 M

Ω or more

2

RR1

LB21

1

1000 M

Ω or more

2

RR2

LB22

1

1000 M

Ω or more

2