Nissan Leaf. Instruction — part 539
EVC-180
< DTC/CIRCUIT DIAGNOSIS >
P0AA6 HIGH VOLTAGE SYSTEM ISOLATION
4.
CHECK INSULATION RESISTANCE OF ELECTRIC COMPRESSOR
Check insulation resistance of electric compressor. Refer to
HAC-179, "Component Inspection"
CAUTION:
• Since testers are polarized, check the polarity of the tester and connect it in the forward direction to
the circuit.
• If the inspection results show no continuity, check the parts for proper installation.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
NO
>> GO TO 5.
5.
CHECK REFRIGERANT GAS
Interview the customer and check maintenance records to see if there is the possibility that coolant a gas other
than EV specific refrigerant gas is mixed in A/C refrigerant gas.
NOTE:
If A/C refrigerant gas other than EV specific refrigerant gas is used, insulation resistance may decrease.
Is the inspection result normal?
YES
>> Replace electric compressor. Refer to
HA-37, "Removal and Installation"
(With heat pump sys-
HA-95, "Removal and Installation"
(Without heat pump system).
NO
>> Change refrigerant gas and compressor oil.
6.
PRECONDITIONING
WARNING:
Disconnect 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.
>> GO TO 7.
7.
CHECK INSULATION RESISTANCE OF PTC HEATER
Check insulation resistance of PTC heater. Refer to
HAC-181, "Component Inspection"
[Auto A/C (with heat
pump)] or
HAC-341, "Component Inspection"
[Auto A/C (without heat pump)].
Standard
: 5 V or less
JPCIA0296ZZ
P0AA6 HIGH VOLTAGE SYSTEM ISOLATION
EVC-181
< DTC/CIRCUIT DIAGNOSIS >
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CAUTION:
• Since testers are polarized, check the polarity of the tester and connect it in the forward direction to
the circuit.
• If the inspection results show no continuity, check the parts for proper installation.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
NO
>> Replace PTC heater. Refer to
HAC-201, "Removal and Installation"
[Auto A/C (with heat pump)]
or
HAC-359, "Removal and Installation"
[Auto A/C (without heat pump)].
8.
PRECONDITIONING
WARNING:
Disconnect 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.
>> GO TO 9.
9.
CHECK INSULATION RESISTANCE OF TRACTION MOTOR INVERTER
Check insulation resistance of traction motor inverter. Refer to
TMS-100, "Component Inspection"
.
CAUTION:
• Since testers are polarized, check the polarity of the tester and connect it in the forward direction to
the circuit.
• If the inspection results show no continuity, check the parts for proper installation.
Is the inspection result normal?
YES
>> Replace traction motor inverter. Refer to
TMS-103, "Removal and Installation"
.
NO
>> Replace traction motor. Refer to
TMS-109, "Removal and Installation"
.
10.
PRECONDITIONING
WARNING:
Disconnect 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
Standard
: 5 V or less
JPCIA0296ZZ
EVC-182
< DTC/CIRCUIT DIAGNOSIS >
P0AA6 HIGH VOLTAGE SYSTEM ISOLATION
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.
>> GO TO 11.
11.
CHECK INSULATION RESISTANCE OF PDM (POWER DELIVERY MODULE)
Check insulation resistance of PDM (Power Delivery Module). Refer to
CAUTION:
• Since testers are polarized, check the polarity of the tester and connect it in the forward direction to
the circuit.
• If the inspection results show no continuity, check the parts for proper installation.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
NO
>> Replace PDM (Power Delivery Module). Refer to
VC-112, "Removal and Installation"
12.
PRECONDITIONING
WARNING:
Disconnect 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.
Standard
: 5 V or less
JPCIA0296ZZ
JPCIA0296ZZ
P0AA6 HIGH VOLTAGE SYSTEM ISOLATION
EVC-183
< DTC/CIRCUIT DIAGNOSIS >
D
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F
G
H
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M
A
B
EVC
N
O
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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.
>> GO TO 13.
13.
CHECK INSULATION RESISTANCE OF HIGH VOLTAGE HARNESS
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 instruction carefully
and be sure to work safely.
1. Disconnect Li-ion battery high voltage harness connector (H3).
2. Check the insulation resistance of high voltage harness with an insulation resistance tester (Multi tester),
between Li-ion battery and PDM (Power Delivery Module).
CAUTION:
• Use 500 V range of insulation resistance tester to measure insulation resistance.
• Wait for 30 seconds until the value becomes stable.
• If the inspection results show no continuity, check the parts for proper installation.
Is the inspection result normal?
YES
>> GO TO 19.
NO
>> GO TO 14.
14.
CHECK INSULATION RESISTANCE OF ELECTRIC COMPRESSOR
Check insulation resistance of electric compressor. Refer to
HAC-179, "Component Inspection"
[Auto A/C
(with heat pump)] or
HAC-339, "Component Inspection"
[Auto A/C (without heat pump)].
CAUTION:
• Since testers are polarized, check the polarity of the tester and connect it in the forward direction to
the circuit.
• If the inspection results show no continuity, check the parts for proper installation.
Is the inspection result normal?
YES
>> GO TO 16.
NO
>> GO TO 15.
15.
CHECK REFRIGERANT GAS
Interview the customer and check maintenance records to see if there is the possibility that coolant a gas other
than EV specific refrigerant gas is mixed in A/C refrigerant gas.
NOTE:
If A/C refrigerant gas other than EV specific refrigerant gas is used, insulation resistance may decrease.
Is the inspection result normal?
Standard
: 5 V or less
+
−
Resistance
Li-ion battery
Connector
Terminal
H17
37
Ground
5.6 M
Ω
38
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