Nissan Leaf. Manual - 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