Nissan Leaf. Manual — part 472
LI-ION BATTERY INSULATION RESISTANCE LOSS CHECK
EVB-171
< DTC/CIRCUIT DIAGNOSIS >
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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
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.
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
+
−
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
.
>> 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
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