Nissan Leaf. Manual — part 550
EVC-224
< DTC/CIRCUIT DIAGNOSIS >
P3117 A/C SYSTEM
P3117 A/C SYSTEM
Description
INFOID:0000000010120681
This DTC shows a decrease in insulation resistance of the high voltage circuit.
When detecting a decrease in insulation resistance of the high voltage circuit during use of air-conditioner,
VCM turns ON/OFF the electric compressor and the PTC heater to check changes in insulation resistance and
identifies a decrease in insulation resistance of the air-conditioning system.
DTC Logic
INFOID:0000000010120682
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
• Turn power switch OFF and wait at least 90 seconds.
CAUTION:
During this period, never perform vehicle handling such as opening and closing of doors. If some
kind of vehicle handling is performed, then wait another 90 seconds or more from the time of the
vehicle handling.
• Make sure that 12V battery voltage is 11 V or more.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE-1
With CONSULT
1. Set the vehicle as the following condition and wait at least 30 minutes.
2. Check DTC.
Is DTC detected?
YES
>> Proceed to
EVC-225, "Diagnosis Procedure"
NO
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE-2
With CONSULT
1. Set the vehicle as the following condition and wait at least 30 minutes.
2. Check DTC.
Is DTC detected?
YES
>> Proceed to
EVC-225, "Diagnosis Procedure"
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P3117
A/C SYSTEM
(Air conditioner system)
When VCM detects a decrease in insulation resistance
of A/C system.
• Electric compressor
• A/C refrigerant gas
• PTC heater
Power switch
READY
Vehicle speed
0 km/h (0 MPH)
A/C switch
ON
A/C set temperature
Full cold
Power switch
READY
Vehicle speed
0 km/h (0 MPH)
A/C switch
ON
A/C set temperature
Full hot
P3117 A/C SYSTEM
EVC-225
< DTC/CIRCUIT DIAGNOSIS >
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NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010120683
1.
CHECK A/C REFRIGERANT GAS
Interview the customer and check maintenance records to see if there is possibility that a refrigerant 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-1 (DTC P3117 is detected during Step 1 of DTC CONFIRMATION PROCEDURE)>>Replace
electric
compressor. Refer to
HA-37, "Removal and Installation"
(with heat pump system) or
(without heat pump system).
YES-2 (DTC P3117 is detected during Step 2 of DTC CONFIRMATION PROCEDURE)>>Replace
PTC
heater. Refer to
HAC-201, "Removal and Installation"
[auto A/C (with heat pump)] or
[auto A/C (without heat pump)].
NO
>> Change A/C refrigerant gas and compressor oil.
EVC-226
< DTC/CIRCUIT DIAGNOSIS >
P311C HIGH VOLTAGE CIRCUIT
P311C HIGH VOLTAGE CIRCUIT
DTC Logic
INFOID:0000000010120684
DTC DETECTION LOGIC
NOTE:
If DTC P311C is displayed with DTC P0AA2, P0AA5, P31D4, P31DB, P31DC, or P31DD, perform diagnosis
for DTC P0AA2, P0AA5, P31D4, P31DB, P31DC, or P31DD.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
CAUTION:
Since this DTC may be displayed if a malfunction is detected in other systems, check them for mal-
function before performing this diagnosis.
• Turn power switch OFF and wait at least 90 seconds.
CAUTION:
During this period, never perform vehicle handling such as opening and closing of doors. If some
kind of vehicle handling is performed, then wait another 90 seconds or more from the time of the
vehicle handling.
• Make sure that 12V battery voltage is 11 V or more.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Set the vehicle to READY.
2. Check DTC.
Is DTC detected?
YES
>> Proceed to
EVC-226, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010120685
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.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P311C
HIGH VOLTAGE SYSTEM
(High voltage system)
Remains all of following condition for 0.2 seconds.
• Li-ion battery current: 5.5 A or more
• Input voltage to traction motor inverter: 24 V or less
• Pre-charge impossible
• High voltage circuit
• Li-ion battery J/B
• Traction motor inverter
• PDM (Power Delivery Mod-
ule)
• Electric compressor
• PTC heater
Remains all of following condition for 0.5 seconds.
• Li-ion battery current: less than 5.5 A
• Input voltage to traction motor inverter: 24 V or less
• Pre-charge impossible
Remains all of following condition for 0.5 seconds.
• Difference between Li-ion battery voltage and input volt-
age to traction motor inverter 100 V or more.
• Pre-charge impossible
P311C HIGH VOLTAGE CIRCUIT
EVC-227
< DTC/CIRCUIT DIAGNOSIS >
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• To prevent the removed service plug from being connected by mistake during the procedure, always
carry it in your pocket or put it in the tool box.
• Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses
before beginning work on the high voltage system.
• Clearly identify the persons responsible for high voltage work and ensure that other persons do not
touch the vehicle. When not working, cover high voltage parts with an insulating cover sheet or sim-
ilar item to prevent other persons from contacting them.
• Refer to
EVC-10, "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.
• Erase DTC after the work is completed.
1.
CHECK SELF-DIAGNOSTIC RESULT IN TRACTION MOTOR INVERTER
With CONSULT
Check self-diagnostic result in “MOTOR”.
Is any DTC detected?
YES
>> Check the DTC. Refer to
.
NO
>> GO TO 2.
2.
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 3.
3.
CHECK ELECTRIC COMPRESSOR
1. Disconnect electric compressor high voltage harness connector.
2. Check the short circuit between electric compressor terminals.
Standard
: 5 V or less
JPCIA0296ZZ
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