Nissan Leaf. Manual — part 470
LI-ION BATTERY INSULATION RESISTANCE LOSS CHECK
EVB-163
< DTC/CIRCUIT DIAGNOSIS >
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LI-ION BATTERY INSULATION RESISTANCE LOSS CHECK
Component Inspection
INFOID:0000000010121165
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.
The following diagnosis procedure must be performed when “P0AA6 or P33E1” are detected and Li-ion
battery is judged that its insulation resistance is dropping.
1.
CHECK MAXIMUM CELL VOLTAGE
With CONSULT
1. Power switch ON.
2. Select “DATA MONITOR” of “HV BAT”.
3. Record “MAXIMUM CELL VOLTAGE”.
NOTE:
It is used, when replace a malfunction module.
>> GO TO 2
2.
CHECK INSULATION OF FRONT MODULE STACK LH-1
CAUTION:
Check that high voltage harness and harness shield have no scratches and cracks. If any damage is
found, replace damaged parts.
1. Remove Li-ion battery. Refer to
EVB-181, "Removal and Installation"
2. Remove Li-ion battery controller. Refer to
EVB-201, "LI-ION BATTERY CONTROLLER : Removal and
.
3. Remove bus bar that connects front module stack LH and front module stack RH.
4. Measure voltages between positive terminal of front module stack LH and battery pack ground, and
between positive terminal of front module stack LH and battery pack ground.
JSCIA0739ZZ
EVB-164
< DTC/CIRCUIT DIAGNOSIS >
LI-ION BATTERY INSULATION RESISTANCE LOSS CHECK
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 3.
3.
CHECK INSULATION OF FRONT MODULE STACK LH-2
1. Disconnect vehicle communication harness connector of front module stack LH.
2. Measure voltages between positive terminal of front module stack LH and battery pack ground, and
between positive terminal of front module stack LH and battery pack ground.
Is the inspection result normal?
YES
>> Replace vehicle communication harness of front module stack LH and GO TO 8.
NO
>> GO TO 4.
4.
CHECK INSULATION OF FRONT MODULE STACK LH-3
1. Remove bus bar that connects service plug and front module stack LH.
2. Measure voltages between positive terminal of front module stack LH and battery pack ground, and
between positive terminal of front module stack LH and battery pack ground.
: Battery pack front
+
−
Voltage
Front module stack LH
Terminal
,
Battery pack ground
Approx. 0 V
: Battery pack front
+
−
Voltage
Front module stack LH
Terminal
,
Battery pack ground
Approx. 0 V
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: Battery pack front
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LI-ION BATTERY INSULATION RESISTANCE LOSS CHECK
EVB-165
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Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 6.
5.
CHECK SERVICE PLUG SWITCH INSULATION RESISTANCE
1. Remove bus bar that connects service plug and front module stack LH from service plug switch bracket.
2. Using insulation resistance tester, measure insulation resistance between service plug switch terminal
and service plug switch bracket.
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.
NOTE:
Check resistance without disassembling service plug switch and service plug switch bracket.
Is the inspection result normal?
YES
>> Replace bus bar that connects service plug and front module stack LH and GO TO 8.
NO
>> Replace service plug switch (Refer to
EVB-204, "BATTERY JUNCTION BOX AND BATTERY
.) and GO TO 8.
6.
CHECK MODULE-1
1. Remove front module stack LH. Refer to
EVB-226, "FRONT MODULE STACK : Removal and Installa-
NOTE:
Do not disassemble module stack.
2. Measure voltages between terminal / of all modules in front
module stack LH and module body.
+
−
Voltage
Front module stack LH
Terminal
,
Battery pack ground
Approx. 0 V
+
—
Resistance
Service plug switch terminal
Service plug switch bracket
1000 M
Ω or more
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+
−
Voltage
Module
Terminal
Module body
Approx. 0 V
EVB-166
< DTC/CIRCUIT DIAGNOSIS >
LI-ION BATTERY INSULATION RESISTANCE LOSS CHECK
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace malfunctioning module (Refer to
EVB-233, "FRONT MODULE STACK : Disassembly
.) and GO TO 8.
7.
CHECK MODULE-2
Measure insulation resistance between terminal / of all modules
in front module stack LH 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 8.
NO
>> Replace malfunctioning module (Refer to
EVB-233, "FRONT MODULE STACK : Disassembly
.) and GO TO 8.
8.
CHECK INSULATION OF FRONT MODULE STACK RH-1
1. Measure voltages between positive terminal of front module stack RH and battery pack ground, and
between positive terminal of front module stack LH and battery pack ground.
Is the inspection result normal?
YES
>> GO TO 14.
+
−
resistance
Module
Terminal
Module body
100 M
Ω or more
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: Battery pack front
+
−
Voltage
Front module stack RH
Terminal
,
Battery pack ground
Approx. 0 V
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