Nissan Leaf. Manual - part 578

EVC-336

< DTC/CIRCUIT DIAGNOSIS >

P31D8 CHARGING CONNECTOR LOCK RELAY

NO

>> Repair or replace error-detected parts.

P31DB SYSTEM MAIN RELAY +

EVC-337

< DTC/CIRCUIT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

EVC

N

O

P

P31DB SYSTEM MAIN RELAY +

DTC Logic

INFOID:0000000010120800

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

With CONSULT

1. Set the vehicle to READY and wait at least 5 seconds.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to 

EVC-337, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120801

1.

CHECK SYSTEM MAIN RELAY 1 DRIVE CIRCUIT-1

1. Turn power switch OFF.

2. Disconnect Li-ion battery harness connector.

3. Check continuity between Li-ion battery connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO 

>> Check short circuit between Li-ion battery harness and ground.

2.

CHECK SYSTEM MAIN RELAY 1 DRIVE CIRCUIT-2

1. Disconnect VCM harness connector.

2. Check harness for short to ground, between VCM harness connector and Li-ion battery harness connec-

tor.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P31DB

HV BATT MAIN RELAY +
(High voltage battery main 
relay +)

System main relay 1 drive circuit remains short to ground for 2.5 
seconds or more.

• Harness or connectors
• Li-ion battery J/B
• VCM

+

−

Continuity

Li-ion battery

Terminal

17

Ground

Not existed

EVC-338

< DTC/CIRCUIT DIAGNOSIS >

P31DB SYSTEM MAIN RELAY +

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-53, "Intermittent Incident"

.

NO

>> Repair or replace error-detected parts.

+

−

Continuity

Li-ion battery

Connector

Terminal

B89

17

Ground

Not existed

P31DC SYSTEM MAIN RELAY -

EVC-339

< DTC/CIRCUIT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

EVC

N

O

P

P31DC SYSTEM MAIN RELAY -

DTC Logic

INFOID:0000000010120802

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. Set the vehicle to READY and wait at least 5 seconds.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to 

EVC-339, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120803

1.

CHECK SYSTEM MAIN RELAY 2 DRIVE CIRCUIT-1

1. Turn power switch OFF.

2. Disconnect Li-ion battery harness connector.

3. Check continuity between Li-ion battery connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO 

>> Check short circuit between Li-ion battery harness and ground.

2.

CHECK SYSTEM MAIN RELAY 2 DRIVE CIRCUIT-2

1. Disconnect VCM harness connector.

2. Check harness for short to ground, between VCM harness connector and Li-ion battery harness connec-

tor.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P31DC

HV BATT MAIN RELAY 

−

(High voltage battery main 
relay 

−)

System main relay 2 drive circuit remains short to ground for 2.5 
seconds or more.

• Harness or connectors
• Li-ion battery J/B
• VCM

+

−

Continuity

Li-ion battery

Terminal

14

Ground

Not existed

+

−

Continuity

Li-ion battery

Connector

Terminal

B89

14

Ground

Not existed