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 >

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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 

EVC-102, "DTC Index"

.

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 >

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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