Nissan Leaf. Manual — part 794
ELECTRIC COMPRESSOR INSULATION RESISTANCE CHECK
HAC-179
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
C
D
E
F
G
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J
K
L
M
A
B
HAC
N
O
P
ELECTRIC COMPRESSOR INSULATION RESISTANCE CHECK
Component Inspection
INFOID:0000000010121883
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
GI-34, "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.
DIAGNOSIS PROCEDURE
CAUTION:
Erase DTC after the work is completed.
1.
PRECONDITIONING
WARNING:
Disconnect the high voltage. Refer to
GI-33, "How to Disconnect High Voltage"
.
Check voltage in high voltage circuit. (Check that condenser are discharged.)
1. Lift up the vehicle and remove the Li-ion battery under covers. Refer to
2. Disconnect high voltage harness connector and PTC heater harness connector from front side of Li-ion
battery. Refer to
EVB-181, "Removal and Installation"
.
3. Measure voltage between high voltage harness connector terminals and PTC heater harness connector
terminals.
DANGER:
Touching high voltage components without using the appropriate protective equipment will
cause electrocution.
CAUTION:
For voltage measurements, use a tester which can measure to 500 V or higher.
Standard
: 5 V or less
JPCIA0296ZZ
HAC-180
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
ELECTRIC COMPRESSOR INSULATION RESISTANCE CHECK
>> GO TO 2.
2.
CHECK ELECTRIC COMPRESSOR INSULATION RESISTANCE
1. Disconnect high voltage harness connector from electric compressor.
2. Check the insulation resistance of the electric compressor with
an insulation resistance tester.
CAUTION:
• Unlike the ordinary tester, the insulation resistance tester
applies 500V 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.
• Use 500V range of insulation resistance tester to measure
insulation resistance. Wait for 30 seconds until the value
becomes stable.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace electric compressor. Refer to
.
+
−
Resistance
Electric compressor
Terminal
1
Aluminum part on side
of electric compressor
3 M
Ω or more
2
JMIIA2755ZZ
PTC HEATER INSPECTION RESISTANCE CHECK
HAC-181
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
PTC HEATER INSPECTION RESISTANCE CHECK
Component Inspection
INFOID:0000000010121884
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
GI-34, "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.
Regarding Wiring Diagram information, refer to
DIAGNOSIS PROCEDURE
CAUTION:
Erase DTC after the work is completed.
1.
PRECONDITIONING
WARNING:
Disconnect the high voltage. Refer to
GI-33, "How to Disconnect High Voltage"
.
Check voltage in high voltage circuit. (Check that condenser are discharged.)
1. Lift up the vehicle and remove the Li-ion battery under covers. Refer to
2. Disconnect high voltage harness connector and PTC heater harness connector from front side of Li-ion
battery. Refer to
EVB-181, "Removal and Installation"
.
3. Measure voltage between high voltage harness connector terminals and PTC heater harness connector
terminals.
DANGER:
Touching high voltage components without using the appropriate protective equipment will
cause electrocution.
JPCIA0296ZZ
HAC-182
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
PTC HEATER INSPECTION RESISTANCE CHECK
CAUTION:
For voltage measurements, use a tester which can measure to 500 V or higher.
>> GO TO 2.
2.
CHECK PTC HEATER INSULATION RESISTANCE
1. Disconnect 12V battery negative terminal. Refer to
HAC-11, "Precaution for Removing 12V Battery"
2. Disconnect high voltage harness connector from Li-ion battery.
3. Check the insulation resistance of the PTC heater with an insu-
lation resistance tester.
CAUTION:
• Unlike the ordinary tester, the insulation resistance tester
applies 500V 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.
• Use 500V range of insulation resistance tester to measure
insulation resistance. Wait for 30 seconds until the value
becomes stable.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace PTC heater. Refer to
Standard
: 5 V or less
+
−
Resistance
Li-ion battery
Connector
Terminal
H19
40
Bonding wire
fixed portion
1 M
Ω or more
41
JMIIA2756ZZ
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