Nissan Leaf. Instruction — part 584
EVC-360
< DTC/CIRCUIT DIAGNOSIS >
P31EC WATER PUMP
P31EC WATER PUMP
DTC Logic
INFOID:0000000010120822
DTC DETECTION LOGIC
NOTE:
This DTC may be detected where there is the mixing of air into coolant.
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. Set the vehicle to READY and wait at least 60 seconds.
2. Check DTC.
Is DTC detected?
YES
>> Proceed to
EVC-360, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010120823
1.
CHECK DTC
Perform self-diagnosis of VCM.
Is DTC detected other than P31EC?
YES
>> Perform diagnosis procedure of detected DTC Refer to
.
NO
>> GO TO 2.
2.
CHECK WATER PUMP FEEDBACK DUTY
On the CONSULT screen, select “EV/HEV” >> “DATA MONITOR” >> “W/P 1 CRNT SPD DUTY”.
Is value between 3% and 7%?
YES
>> GO TO 3.
NO
>> GO TO 4.
3.
CHECK COOLANT
1. Turn power switch OFF.
2. Check that the coolant is free from air mixture.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Perform the air bleeding. Refer to
.
4.
PERFORM DTC CONFIRMATION PROCEDURE AGAIN
With CONSULT
1. Turn power switch ON and erase DTC.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P31EC
WATER PUMP 1
(Water pump 1)
Electric water pump feedback duty keeps between 3% and 7% for
30 seconds.
• Harness or connectors
• Electric water pump
• VCM
P31EC WATER PUMP
EVC-361
< DTC/CIRCUIT DIAGNOSIS >
D
E
F
G
H
I
J
K
L
M
A
B
EVC
N
O
P
2. Perform DTC confirmation procedure again. Refer to
Is DTC “P31EC” detected again?
YES
>> Replace VCM. Refer to
EVC-423, "Removal and Installation"
.
NO
>> INSPECTION END
EVC-362
< DTC/CIRCUIT DIAGNOSIS >
P31EE REFRIGERANT PRESSURE SENSOR
P31EE REFRIGERANT PRESSURE SENSOR
DTC Logic
INFOID:0000000010120824
DTC DETECTION LOGIC
NOTE:
If DTC P31EE is displayed with DTC P31E5, first perform the trouble diagnosis for DTC P31E5. Refer to
.
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 CONFIRMATION PROCEDURE
With CONSULT
1. Turn power switch ON at least 20 seconds.
2. Check self-diagnostic result.
Is DTC detected?
YES
>> Proceed to
EVC-362, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010120825
1.
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY-1
1. Turn power switch OFF.
2. Disconnect refrigerant pressure sensor harness connector.
3. Turn power switch ON.
4. Check the voltage between refrigerant pressure sensor harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 2.
2.
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY-2
Check the voltage between refrigerant pressure sensor harness connector and ground.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P31EE
REFRIGERANT PRES-
SURE SENSOR
(Refrigerant pressure sen-
sor)
• Signal voltage from refrigerant pressure sensor remains
Approx. 0 V for 2.5 seconds or more
• Signal voltage from refrigerant pressure sensor remains
Approx. 4.7 V or more for 2.5 seconds or more
• Harness or connectors
(Refrigerant pressure sensor
circuit is open or shorted.)
• Refrigerant pressure sensor
• VCM
Refrigerant pressure sensor
Voltage
(Approx.)
Connector
+
−
Terminal
E49
3
1
5 V
P31EE REFRIGERANT PRESSURE SENSOR
EVC-363
< DTC/CIRCUIT DIAGNOSIS >
D
E
F
G
H
I
J
K
L
M
A
B
EVC
N
O
P
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn power switch OFF.
2. Disconnect VCM harness connector.
3. Check the continuity between refrigerant pressure sensor and VCM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> Check power supply circuit for sensor power supply. Refer to
EVC-351, "Diagnosis Procedure"
.
NO
>> Repair or replace error-detected parts.
4.
CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT
1. Turn power switch OFF.
2. Disconnect VCM harness connector.
3. Check the continuity between refrigerant pressure sensor and VCM harness connector.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK VCM GROUND CIRCUIT
Check the continuity between VCM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK INTERMITTENT INCIDENT
+
−
Voltage
(Approx.)
Refrigerant pressure sensor
Connector
Terminal
E49
3
Ground
5 V
+
−
Continuity
Refrigerant pressure sensor
VCM
Connector
Terminal
Connector
Terminal
E49
3
E62
98
Existed
+
−
Continuity
Refrigerant pressure sensor
VCM
Connector
Terminal
Connector
Terminal
E49
1
E62
123
Existed
+
−
Continuity
VCM
Connector
Terminal
E61
58
Ground
Existed
65
E62
118
126
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