Nissan Leaf. Instruction — part 473
LI-ION BATTERY HEATER SYSTEM INSULATION RESISTANCE CHECK
EVB-175
< DTC/CIRCUIT DIAGNOSIS >
D
E
F
G
H
I
J
K
L
M
A
B
EVB
N
O
P
Is the inspection result normal?
YES
>> INSPECTION END.
NO
>> Replace high voltage harness.
High voltage harness
Ground
Resistance
Connector
Terminal
LB18
11
Battery pack lower case
1000 M
Ω or more
EVB-176
< DTC/CIRCUIT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
INFOID:0000000010121167
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 Instruction. A malfunction may occur if this is not observed.
1.
CHECK FUSE
Check that the following fuse is not fusing.
Is the fuse fusing?
YES
>> Replace the fuse after repairing the applicable circuit.
NO
>> GO TO 2.
2.
CHECK LI-ION BATTERY CONTROLLER GROUND CIRCUIT
1. Turn power switch OFF.
2. Disconnect Li-ion battery vehicle communication harness connector.
3. Check the continuity between Li-ion battery vehicle communication harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK BATTERY POWER SUPPLY
Check the voltage between Li-ion battery vehicle communication harness connector and ground.
Power supply
Fuse No.
Battery
79
Power switch ON
57
74
+
−
Continuity
Li-ion battery
Connector
Terminal
B24
6
Ground
Existed
7
8
POWER SUPPLY AND GROUND CIRCUIT
EVB-177
< DTC/CIRCUIT DIAGNOSIS >
D
E
F
G
H
I
J
K
L
M
A
B
EVB
N
O
P
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
CHECK BATTERY POWER SUPPLY CIRCUIT
1. Check the continuity between Li-ion battery vehicle communication harness connector and fuse terminal.
2. Also check harness for short to ground.
Is the inspection result normal?
YES
>> Check power supply circuit for battery power supply.
NO
>> Repair or replace error-detected parts.
5.
CHECK POWER SWITCH ON POWER SUPPLY
1. Turn power switch ON.
2. Check the voltage between Li-ion battery vehicle communication harness and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 6.
6.
CHECK POWER SWITCH ON POWER SUPPLY CIRCUIT-1
1. Turn power switch OFF.
2. Disconnect IPDM E/R harness connector.
3. Check the continuity between Li-ion battery vehicle communication harness and IPDM E/R harness con-
nector.
4. Also check harness for short to ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace error-detected parts.
7.
CHECK POWER SWITCH ON POWER SUPPLY CIRCUIT-2
1. Check the continuity between Li-ion battery vehicle communication harness and fuse terminal.
+
−
Voltage
Li-ion battery
Connector
Terminal
B24
5
Ground
12V battery power
supply
+
−
Continuity
Li-ion battery
Connector
Terminal
B24
5
No.79 fuse ter-
minal
Existed
+
−
Voltage
(Approx.)
Li-ion battery
Connector
Terminal
B24
4
Ground
11 – 14 V
31
Li-ion battery
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
B24
4
E15
59
Existed
EVB-178
< DTC/CIRCUIT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
2. Also check harness for short to ground.
Is the inspection result normal?
YES
>> Check power supply circuit for battery power supply.
NO
>> Repair or replace error-detected parts.
8.
PRECONDITIONING
WARNING:
Shut off high voltage circuit. 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 9.
9.
CHECK HARNESS BETWEEN LI-ION BATTERY AND LI-ION BATTERY CONTROLLER
1. Check the continuity between Li-ion battery vehicle communication harness connector and Li-ion battery
controller harness connector.
2. Also check harness for short to ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace error-detected parts.
Li-ion battery
—
Continuity
Connector
Terminal
B24
31
No.74 fuse ter-
minal
Existed
LBC
Li-ion battery
Continuity
Connector
Terminal
Connector
Terminal
LB11
5
LB1
31
Existed
7
4
12
5
2
8
3
7
14
6
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