Nissan Leaf. Manual — part 583
EVC-356
< DTC/CIRCUIT DIAGNOSIS >
P31E8 WATER PUMP
NO
>> GO TO 4.
4.
CHECK WATER PUMP FEEDBACK DUTY-3
With CONSULT
1. On the CONSULT screen, select “EV/HEV” >> “DATA MONITOR” >> “W/P 1 CRNT SPD DUTY” and
“WATER PUMP 1 TRG DUTY”.
2. Check that “W/P 1 CRNT SPD DUTY” and “WATER PUMP 1 TRG DUTY” agree with the values listed
below.
Are the above values satisfied?
YES
>> GO TO 5.
NO
>> Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
5.
CHECK WATER PUMP SIGNAL CIRCUIT
1. Turn power switch OFF.
2. Disconnect electric water pump harness connector and VCM harness connector.
3. Check the continuity between electric water pump harness connector and VCM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK FUSE
1. Turn power switch OFF.
2. Pull out #71 fuse.
3. Make sure that the fuse is not fusing.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace the fuse after repairing the applicable circuit.
7.
CHECK WATER PUMP INPUT POWER VOLTAGE
1. Insert the fuse which pulled out.
2. Disconnect water pump harness connector.
3. Turn power switch ON.
4. Check the voltage between water pump harness connector and ground.
Is the inspection result normal?
YES
>> Replace electric water pump. Refer to
HCO-25, "Removal and Installation"
.
NO
>> GO TO 8.
8.
CHECK WATER PUMP INPUT POWER CIRCUIT-1
1. Turn power switch OFF.
W/P 1 CRNT SPD DUTY
17 – 82%
WATER PUMP 1 TRG DUTY
20 – 80%
Electric water pump
VCM
Continuity
Connector
Terminals
Connector
Terminals
E67
3
E61
20
Existed
4
19
+
−
Voltage
Electric water pump
Connector
Terminal
E67
1
Ground
12V battery volt-
age
P31E8 WATER PUMP
EVC-357
< DTC/CIRCUIT DIAGNOSIS >
D
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2. Pull out #71 fuse.
3. Check the continuity between electric water pump harness connector and fuse terminal.
4. Also check harness for short to ground.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair or replace error-detected parts.
9.
CHECK WATER PUMP INPUT POWER CIRCUIT-2
1. Remove M/C relay.
2. Check the continuity between M/C relay harness connector and fuse terminal.
3. Also check harness for short to ground.
Is the inspection result normal?
YES
>> Perform trouble diagnosis for M/C relay routing circuit. Refer to
EVC-371, "Diagnosis Procedure"
.
NO
>> Repair or replace error-detected parts.
+
−
Continuity
Electric water pump
Connector
Terminal
E67
1
#71 fuse termi-
nal
Existed
+
−
Continuity
M/C relay
Connector
Terminal
E65
5
#71 fuse termi-
nal
Existed
EVC-358
< DTC/CIRCUIT DIAGNOSIS >
P31E9 WATER PUMP
P31E9 WATER PUMP
DTC Logic
INFOID:0000000010120820
DTC DETECTION LOGIC
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. Turn power switch OFF and wait at least 60 seconds.
2. Set the vehicle to READY and wait at least 60 seconds.
3. Check DTC.
Is DTC detected?
YES
>> Proceed to
EVC-358, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010120821
1.
CHECK DTC
Perform self-diagnosis of VCM.
Is DTC detected other than P31E9?
YES
>> Perform diagnosis procedure of detected DTC. Refer to
NO
>> GO TO 2.
2.
CHECK WATER PUMP FEEDBACK DUTY
With CONSULT
On the CONSULT screen, select “EV/HEV” >> “DATA MONITOR” >> “W/P 1 CRNT SPD DUTY”.
Is value between 82% and 91%?
YES
>> GO TO 3.
NO
>> Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
3.
CHECK FUSE
1. Turn power switch OFF.
2. Pull out #71 fuse.
3. Make sure that the fuse is not fusing.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace the fuse after repairing the applicable circuit.
4.
CHECK WATER PUMP INPUT POWER VOLTAGE
1. Insert the fuse which pulled out.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P31E9
WATER PUMP 1
(Water pump 1)
Electric water pump feedback duty keeps between 82% and 91%
for 30 seconds.
• Harness or connectors
• Electric water pump
• VCM
P31E9 WATER PUMP
EVC-359
< DTC/CIRCUIT DIAGNOSIS >
D
E
F
G
H
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J
K
L
M
A
B
EVC
N
O
P
2. Disconnect water pump harness connector.
3. Turn power switch ON.
4. Check the voltage between water pump harness connector and ground.
Is the inspection result normal?
YES
>> Replace electric water pump. Refer to
HCO-25, "Removal and Installation"
.
NO
>> GO TO 5.
5.
CHECK WATER PUMP INPUT POWER CIRCUIT-1
1. Turn power switch OFF.
2. Pull out #71 fuse.
3. Check the continuity between electric water pump harness connector and fuse terminal.
4. Also check harness for short to ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK WATER PUMP INPUT POWER CIRCUIT-2
1. Remove M/C relay.
2. Check the continuity between M/C relay harness connector and fuse terminal.
3. Also check harness for short to ground.
Is the inspection result normal?
YES
>> Perform trouble diagnosis for M/C relay routing circuit. Refer to
EVC-371, "Diagnosis Procedure"
.
NO
>> Repair or replace error-detected parts.
+
−
Voltage
Electric water pump
Connector
Terminal
E67
1
Ground
12V battery volt-
age
+
−
Continuity
Electric water pump
Connector
Terminal
E67
1
#71 fuse termi-
nal
Existed
+
−
Continuity
M/C relay
Connector
Terminal
E65
5
#71 fuse termi-
nal
Existed
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