Nissan Leaf. Instruction — part 783
B27C0 ELECTRIC COMPRESSOR
HAC-135
< 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
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK PDM (POWER DELIVERY MODULE)
Check PDM (power delivery module). Refer to
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace malfunctioning components.
5.
CHECK ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS POWER SUPPLY CIRCUIT FOR OPEN
1. Disconnect electric compressor and Li-ion battery connector.
2. Check continuity between electric compressor high voltage harness connector and Li-ion battery high volt-
age harness connector.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace high voltage harness between electric compressor and PDM (power delivery module),
and between PDM (power delivery module) and Li-ion battery.
6.
CHECK ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS GROUND CIRCUIT
Check continuity between electric compressor high voltage harness connector and Li-ion battery high voltage
harness connector.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace high voltage harness between electric compressor and PDM (power delivery module),
and between PDM (power delivery module) and Li-ion battery.
7.
CHECK A/C AUTO AMP.
With CONSULT
1. Reconnect all harness connectors disconnected.
2. Set the vehicle to READY.
3. Using CONSULT, perform “MODE1” of “HVAC TEST” in “Active Test” of “HVAC”. Refer to
.
4. Check that the electric compressor operates normally.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace A/C auto amp. Refer to
HAC-187, "Removal and Installation"
. Then GO TO 8.
8.
PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC confirmation procedure. Refer to
.
Is DTC B27C0 detected?
YES
>> Replace electric compressor. Refer to
HA-37, "Removal and Installation"
.
Electric compressor
Ground
Continuity
Connector
Terminal
F20
5
No
Electric compressor
Li-ion battery
Continuity
Connector
Terminal
Connector
Terminal
H2
2
H3
37
Yes
Electric compressor
Li-ion battery
Continuity
Connector
Terminal
Connector
Terminal
H2
1
H3
38
Yes
HAC-136
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
B27C0 ELECTRIC COMPRESSOR
NO
>> Inspection End.
B27CC, B27CD ELECTRIC COMPRESSOR
HAC-137
< 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
B27CC, B27CD ELECTRIC COMPRESSOR
DTC Logic
INFOID:0000000010121844
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-137, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010121845
1.
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 2.
NO
>> Repair or replace malfunctioning components.
2.
CHECK REFRIGERANT FOR LEAKAGES
Check refrigerant for leakages. Refer to
HA-26, "Check Refrigerant Leakage"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning components.
3.
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 4.
NO
>> Check cooling fan. Refer to
EVC-367, "Component Function Check"
.
4.
CHECK REFRIGERANT CYCLE
Check refrigerant cycle. Refer to
Is the inspection result normal?
YES
>> Replace electric compressor. Refer to
HA-37, "Removal and Installation"
.
NO
>> Repair or replace malfunctioning components.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B27CC
COMP VOL LIMIT
When the command speed control is disabled
due to voltage decrease of high voltage system.
• Li-ion battery
• Refrigerant leakage
• Cooling fan
• Refrigerant insufficient or overfilled
• Electric compressor
B27CD
COMP MTR CURRNT LMT
When the command speed control is disabled
due to decrease of motor upper limit.
HAC-138
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
B27CE ELECTRIC COMPRESSOR
B27CE ELECTRIC COMPRESSOR
DTC Logic
INFOID:0000000010121846
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-138, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010121847
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 [B27CE] 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
B27CE
COMP OVERHEAT
When the inverter temperature exceeds the
standard value.
• Electric compressor
• Cooling fan
• Refrigerant leakage
• Refrigerant insufficient
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