Nissan Leaf. Instruction — part 781
B27BC ELECTRIC COMPRESSOR
HAC-127
< 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” on “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 B27BC 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-128
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
B27BC ELECTRIC COMPRESSOR
NO
>> Inspection End.
B27BF ELECTRIC COMPRESSOR
HAC-129
< 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
B27BF ELECTRIC COMPRESSOR
DTC Logic
INFOID:0000000010121839
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-129, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010121840
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 Instruction. A malfunction may occur if this is not observed.
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"
.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B27BF
COMP INTNL CIRC
When HVIL open circuit is detected in electric
compressor system.
• High voltage harness connector
connecting malfunction
• High voltage harness connector
• Electric compressor
HAC-130
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITH HEAT PUMP)]
B27BF ELECTRIC COMPRESSOR
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 THE CONNECTION STATUS OF THE ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS
CONNECTOR
1. Disconnect the cable from the negative terminal of the 12V battery. Refer to
2. Check that the high voltage harness connector of electric compressor is connected normally.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Reconnect the high voltage harness connector. If reconnecting is impossible due to high voltage
harness connector malfunction, replace the high voltage harness between electric compressor
and PDM (Power Delivery Module).
3.
CHECK THE ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS CONNECTOR
1. Disconnect the electric compressor high voltage harness connector.
2. Check for any adhering foreign substances, cracking, or damage on the high voltage harness connector
terminal of electric compressor.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace the high voltage harness between electric compressor and PDM (power delivery mod-
ules).
4.
CHECK THE HVIL CIRCUIT OF THE ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS CONNEC-
TOR
Check for continuity between HVIL circuit terminals of electric compressor vehicle side high voltage harness
connector. Refer to
HAC-131, "Component Inspection"
Is the inspection result normal?
YES
>> Replace electric compressor. Refer to
HA-37, "Removal and Installation"
.
NO
>> Replace the high voltage harness between electric compressor and PDM (power delivery mod-
ule).
Standard
: 5 V or less
JPCIA0296ZZ
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