Nissan Leaf. Manual - part 471

LI-ION BATTERY INSULATION RESISTANCE LOSS CHECK

EVB-167

< DTC/CIRCUIT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

EVB

N

O

P

NO

>> GO TO 9.

9.

CHECK INSULATION OF FRONT MODULE STACK RH-2

1. Disconnect vehicle communication harness connector of front module stack RH.
2. Measure voltages between positive terminal   of front module stack RH and battery pack ground, and

between positive terminal   of front module stack RH and battery pack ground.

Is the inspection result normal?

YES

>> Replace vehicle communication harness of front module stack RH and GO TO 14.

NO

>> GO TO 10.

10.

CHECK INSULATION OF FRONT MODULE STACK RH-3

1. Remove bus bar that connects front module stack RH and battery junction box.
2. Measure voltages between positive terminal   of front module stack RH and battery pack ground, and

between positive terminal   of front module stack RH and battery pack ground.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> GO TO 12.

: Battery pack front

+

−

Voltage

Front module stack RH

Terminal

, 

Battery pack ground

Approx. 0 V

JSCIA0741ZZ

: Battery pack front

+

−

Voltage

Front module stack RH

Terminal

, 

Battery pack ground

Approx. 0 V

JSCIA0741ZZ

EVB-168

< DTC/CIRCUIT DIAGNOSIS >

LI-ION BATTERY INSULATION RESISTANCE LOSS CHECK

11.

CHECK BATTERY JUNCTION BOX INSULATION RESISTANCE

1. Using insulation resistance tester, measure insulation resistance

between high voltage terminal  /  of battery junction box and

battery pack ground.

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 sys-

tem, 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

>> Replace bus bar that connects front module stack RH and battery junction box and GO TO 14.

NO

>> Replace battery junction box (Refer to 

EVB-206, "BATTERY JUNCTION BOX AND BATTERY

HARNESS : Disassembly and Assembly"

) and GO TO 14.

12.

CHECK MODULE-3

1. Remove front module stack RH. Refer to 

EVB-226, "FRONT MODULE STACK : Removal and Installa-

tion"

.

NOTE:

Do not disassemble module stack.

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

module stack RH and module body.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Replace malfunctioning module (Refer to 

EVB-233, "FRONT MODULE STACK : Disassembly

and Assembly"

.) and GO TO 14.

: Battery pack front

Battery junction box

—

Resistance

Terminal

Battery pack ground

1000 M

Ω or more

JSCIA0453ZZ

JSCIA0740ZZ

+

−

Voltage

Module

Terminal

Module body

Approx. 0 V

LI-ION BATTERY INSULATION RESISTANCE LOSS CHECK

EVB-169

< DTC/CIRCUIT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

EVB

N

O

P

13.

CHECK MODULE-4

Measure insulation resistance between terminal  /  of all modules

in front module stack RH 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

>> Check insulation resistance of front module stack RH, because front module stack LH is normal.

GO TO 14.

NO

>> Replace malfunctioning module (Refer to 

EVB-233, "FRONT MODULE STACK : Disassembly

and Assembly"

.) and GO TO 14.

14.

CHECK INSULATION OF REAR MODULE STACK-1

1. Measure voltages between positive terminal   of rear module stack and battery pack ground, and

between positive terminal   of rear module stack and battery pack ground.

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

>> GO TO 15.

15.

CHECK INSULATION OF REAR MODULE STACK-2

+

−

resistance

Module

Terminal

Module body

100 M

Ω or more

JSCIA0740ZZ

+

−

Voltage

Rear module stack

Terminal

, 

Battery pack ground

Approx. 0 V

JSCIA0744ZZ

EVB-170

< DTC/CIRCUIT DIAGNOSIS >

LI-ION BATTERY INSULATION RESISTANCE LOSS CHECK

1. Disconnect vehicle communication harness connector   of rear

module stack.

2. Measure voltages between positive terminal   of rear module stack and battery pack ground, and

between positive terminal   of rear module stack and battery pack ground.

Is the inspection result normal?

YES

>> Replace vehicle communication harness of rear module stack.

NO

>> GO TO 16.

16.

CHECK INSULATION OF FRONT MODULE STACK RH-3

1. Remove mounting nuts  /  and remove high voltage harness from rear module stack.

2. Measure voltages between positive terminal   of rear module stack and battery pack ground, and

between positive terminal   of rear module stack and battery pack ground.

JSCIA0146ZZ

+

−

Voltage

Front module stack RH

Terminal

, 

Battery pack ground

Approx. 0 V

JSCIA0744ZZ

JSCIA0743ZZ