Nissan Leaf. Manual — part 780
B27B8 ELECTRIC COMPRESSOR
HAC-123
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
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5.
CHECK PDM (POWER DELIVERY MODULE)
Check PDM (power delivery module). Refer to
.
Is the inspection result normal?
YES
>> Replace electric compressor. Refer to
HA-37, "Removal and Installation"
.
NO
>> Repair or replace malfunctioning components.
HAC-124
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
B27B9 ELECTRIC COMPRESSOR
B27B9 ELECTRIC COMPRESSOR
DTC Logic
INFOID:0000000010121835
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn power switch OFF.
2. Set the vehicle to READY.
3. Operate the automatic air conditioning system.
4. Set the temperature to full cold and wait at least 2 seconds.
5. Select “Self Diagnostic Result” of “HVAC” using CONSULT.
6. Check DTC.
Is DTC detected?
YES
>> Refer to
HAC-124, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010121836
1.
CHECK REFRIGERANT FOR LEAKAGES
Check refrigerant for leakages. Refer to
HA-26, "Check Refrigerant Leakage"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning components.
2.
CHECK COOLING FAN OPERATION
1. Set the vehicle to READY.
2. Operate the automatic air conditioning system.
3. Check that the cooling fan is operating.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Check cooling fan. Refer to
EVC-367, "Component Function Check"
.
3.
CHECK REFRIGERANT CYCLE
Check refrigerant cycle. Refer to
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace malfunctioning components.
4.
CHECK AIR CONDITIONING SYSTEM BY RE-FILLING REFRIGERANT
1. Collect refrigerant, and charge the air conditioning system from a new service can with the specified
amount refrigerant.
2. After operate air conditioning system 15 minutes or more, perform DTC confirmation procedure, and
check that DTC [B27B9] is not detected.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace electric compressor. Refer to
HA-37, "Removal and Installation"
.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B27B9
COMP OVERHEAT
When the inverter temperature exceeds the
standard value.
• Refrigerant leakage
• Refrigerant insufficient
• Cooling fan
• Electric compressor
B27BC ELECTRIC COMPRESSOR
HAC-125
< 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
B27BC ELECTRIC COMPRESSOR
DTC Logic
INFOID:0000000010121837
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn power switch OFF.
2. Set the vehicle to READY.
3. Operate the automatic air conditioning system.
4. Set the temperature to full cold and wait at least 2 seconds.
5. Select “Self Diagnostic Result” of “HVAC” using CONSULT.
6. Check DTC.
Is DTC detected?
YES
>> Refer to
HAC-125, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010121838
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:
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B27BC
COMP COMM ERROR
HVAC->COMP
When the electric compressor cannot receive
the signal transmitted from the A/C auto amp.
• Electric compressor
• A/C auto amp.
• Harness or connectors
(Electric compressor circuit is open
or shorted.)
• High voltage harness or connectors
(Electric compressor high voltage
circuit is open or shorted.)
• PDM (power delivery module)
HAC-126
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
B27BC ELECTRIC COMPRESSOR
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.
>> GO TO 2.
2.
CHECK ELECTRIC COMPRESSOR COMMUNICATION LINE FOR OPEN
1. Turn power switch OFF.
2. Disconnect electric compressor and A/C auto amp. connector.
3. Check continuity between electric compressor harness connector and A/C auto amp. harness connector.
NOTE:
Check for any adhering foreign substances, cracking, or damage on the electric compressor terminal and
A/C auto amp. harness connector terminal.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK ELECTRIC COMPRESSOR COMMUNICATION LINE FOR SHORT
Check continuity between electric compressor harness connector and ground.
Standard
: 5 V or less
JPCIA0296ZZ
Electric compressor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
F20
5
M55
40
Yes
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