Nissan Leaf. Instruction — part 779
B27B4 ELECTRIC COMPRESSOR
HAC-119
< 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
B27B4 ELECTRIC COMPRESSOR
DTC Logic
INFOID:0000000010121829
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. Select “Self Diagnostic Result” of “HVAC” using CONSULT.
4. Check DTC.
Is DTC detected?
YES
>> Refer to
HAC-119, "Diagnosis Procedure"
.
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010121830
Regarding Wiring Diagram information, refer to
1.
CHECK ELECTRIC COMPRESSOR POWER SUPPLY CIRCUIT FOR OPEN
1. Turn power switch OFF
2. Disconnect electric compressor connector.
3. Remove A/C relay
4. Check continuity between electric compressor harness connector and A/C relay harness connector.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK ELECTRIC COMPRESSOR POWER SUPPLY CIRCUIT FOR SHORT
Check continuity between electric compressor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK ELECTRIC COMPRESSOR GROUND CIRCUIT FOR OPEN
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B27B4
COMP LO VOL SYS
Voltage of battery power supply input to electric
compressor is 9 V or less or 17 V or more.
• Electric compressor
• A/C relay system
• Harness or connectors
(Electric compressor circuit is open
or shorted.)
Electric compressor
A/C relay
Continuity
Connector
Terminal
Connector
Terminal
F20
7
E52
5
Yes
Electric compressor
—
Continuity
Connector
Terminal
F20
7
Ground
No
HAC-120
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
B27B4 ELECTRIC COMPRESSOR
Check continuity between electric compressor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK A/C RELAY
Check A/C relay. Refer to
EVC-385, "Diagnosis Procedure"
Is the inspection result normal?
YES
>> Replace electric compressor. Refer to
HA-37, "Removal and Installation"
.
NO
>> Repair or replace malfunctioning components.
Electric compressor
—
Continuity
Connector
Terminal
F20
8
Ground
Yes
B27B5, 27B6, B27B7, B27BA, B27BE ELECTRIC COMPRESSOR
HAC-121
< 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
B27B5, 27B6, B27B7, B27BA, B27BE ELECTRIC COMPRESSOR
DTC Logic
INFOID:0000000010121831
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-121, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010121832
1.
REPLACE ELECTRIC COMPRESSOR
Replace electric compressor. Refer to
HA-37, "Removal and Installation"
.
>> Inspection End.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B27B5
COMP INTNL CIRC
When overcurrent is detected in inverter.
Electric compressor
B27B6
COMP INTNL CIRC
When open circuit is detected in inverter.
B27B7
COMP CURNT SENS
When inverter is OFF, the detected current val-
ue in inverter is the standard value or more.
B27BA
COMP SYSTEM
When the internal system malfunction stop oc-
curs repeatedly.
B27BE
COMP INTNL SYS
When a malfunction is detected in the CPU,
ROM or RAM of the inverter.
HAC-122
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
B27B8 ELECTRIC COMPRESSOR
B27B8 ELECTRIC COMPRESSOR
DTC Logic
INFOID:0000000010121833
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-122, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010121834
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 LI-ION BATTERY
1. Connect 12V battery negative terminal.
2. Check Li-ion battery. Refer to
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace malfunctioning components.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B27B8
COMP OVER LOADED
When the high load status at low speed of elec-
tric compressor is continued.
• Refrigerant leakage
• Cooling fan
• Refrigerant insufficient or overfilled
• Li-ion battery
• PDM (power delivery module)
• Electric compressor
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