Nissan Leaf. Manual — part 570

EVC-304

< DTC/CIRCUIT DIAGNOSIS >

P31B6 CAN COMMUNICATION

P31B6 CAN COMMUNICATION

DTC Logic

INFOID:0000000010120773

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. Turn power switch ON and wait at least 10 seconds.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to

EVC-304, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120774

1.

PERFORM TROUBLE DIAGNOSIS FOR CAN COMMUNICATION

Perform trouble diagnosis for CAN communication. Refer to

LAN-17, "Trouble Diagnosis Flow Chart"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK SELF-DIAGNOSTIC RESULT IN VCM

With CONSULT

Check self-diagnostic result in “EV/HEV”.
Is any CAN error (U1000 excluded) other than DTC P31B6 detected?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

REPLACE VCM

With CONSULT

1. Replace VCM. Refer to

EVC-423, "Removal and Installation"

.

2. Perform DTC confirmation procedure again. Refer to

EVC-304, "DTC Logic"

.

Is DTC P31B6 detected again?

YES

>> Replace IPDM E/R. Refer to

PCS-29, "Removal and Installation"

.

NO

>> INSPECTION END

4.

REPLACE IPDM E/R

With CONSULT

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P31B6

COMMUNICATION ERROR
(Communication error)

When VCM detects an error signal that is received from IPDM E/
R via CAN communication

• CAN communication
• IPDM E/R
• VCM

P31B6 CAN COMMUNICATION

EVC-305

< DTC/CIRCUIT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

EVC

N

O

P

1. Replace IPDM E/R. Refer to

PCS-29, "Removal and Installation"

.

2. Perform DTC confirmation procedure again. Refer to

EVC-304, "DTC Logic"

.

Is DTC P31B6 detected again?

YES

>> Replace VCM. Refer to

EVC-423, "Removal and Installation"

.

NO

>> INSPECTION END

EVC-306

< DTC/CIRCUIT DIAGNOSIS >

P31B7 CAN COMMUNICATION

P31B7 CAN COMMUNICATION

DTC Logic

INFOID:0000000010120775

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. Turn power switch ON and wait at least 10 seconds.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to

EVC-306, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010120776

1.

PERFORM TROUBLE DIAGNOSIS FOR CAN COMMUNICATION

Perform trouble diagnosis for CAN communication. Refer to

LAN-17, "Trouble Diagnosis Flow Chart"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK SELF-DIAGNOSTIC RESULT IN VCM

With CONSULT

Check self-diagnostic result in “EV/HEV”.
Is any CAN error (U1000 excluded) other than DTC P31B7 detected?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

REPLACE VCM

With CONSULT

1. Replace VCM. Refer to

EVC-423, "Removal and Installation"

.

2. Perform DTC confirmation procedure again. Refer to

EVC-306, "DTC Logic"

.

Is DTC P31B7 detected again?

YES

>> Replace air bag diagnosis sensor unit. Refer to

SR-38, "Removal and Installation"

.

NO

>> INSPECTION END

4.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P31B7

COMMUNICATION ER-
ROR
(Communication error)

When VCM detects an error signal that is received from air bag
diagnosis sensor unit via CAN communication

• CAN communication
• Air bag diagnosis sen-

sor unit

• VCM

P31B7 CAN COMMUNICATION

EVC-307

< DTC/CIRCUIT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

EVC

N

O

P

With CONSULT

1. Replace air bag diagnosis sensor unit. Refer to

SR-38, "Removal and Installation"

.

2. Perform DTC confirmation procedure again. Refer to

EVC-306, "DTC Logic"

.

Is DTC P31B7 detected again?

YES

>> Replace VCM. Refer to

EVC-423, "Removal and Installation"

.

NO

>> INSPECTION END