Nissan Leaf. Manual - part 1255

VSP-40

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000010121576

OVERALL SEQUENCE

Reference 1···

VSP-34, "DTC Index"

.

DETAILED FLOW

1.

OBTAIN INFORMATION ABOUT SYMPTOM

Interview the customer to obtain as much information as possible about the conditions and environment under

which the malfunction occurred.

>> GO TO 2.

2.

CHECK SYMPTOM

• Check the symptom based on the information obtained from the customer.

• Check if any other malfunctions are present.

>> GO TO 3.

3.

CHECK CONSULT SELF-DIAGNOSIS RESULTS

1. Connect CONSULT and perform self-diagnosis. Refer to 

VSP-34, "DTC Index"

.

2. When DTC is detected, follow the instructions below:

-

Record DTC and Freeze Frame Data.

Is any DTC detected?

YES

>> GO TO 5.

JSMIA0773GB

DIAGNOSIS AND REPAIR WORKFLOW

VSP-41

< BASIC INSPECTION >

C

D

E

F

G

H

I

J

K

M

A

B

VSP

N

O

P

NO

>> GO TO 4.

4.

NARROW DOWN MALFUNCTIONING PARTS BY SYMPTOM DIAGNOSIS

Perform symptom diagnosis and narrow down the malfunctioning parts.

>> GO TO 5.

5.

REPAIR OR REPLACE MALFUNCTIONING PARTS

Repair or replace malfunctioning parts.

NOTE:

If DTC is detected, erase DTC after repairing or replacing malfunctioning parts.

>> GO TO 6.

6.

FINAL CHECK

Check that the VSP system operates normally.
Does it operate normally?

YES

>> INSPECTION END

NO

>> GO TO 1.

VSP-42

< DTC/CIRCUIT DIAGNOSIS >

U1000 CAN COMM CIRCUIT

DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000010121577

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-vehicle

multiplex communication system with high data communication speed and excellent error detect ability. Many

electronic control units are equipped onto vehicles, and each control unit shares information and links with

other control units during operation (not independent). In CAN communication, control units are connected

with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with

less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to 

LAN-37, "CAN COMMUNICATION SYSTEM : CAN Communica-

tion Signal Chart"

.

DTC Logic

INFOID:0000000010121578

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000010121579

1.

PERFORM SELF DIAGNOSTIC

1. Turn power switch ON and wait for 2 seconds or more.

2. Perform self-diagnosis with CONSULT.

3. Check if the DTC “U1000” is detected in self-diagnosis results of “VSP”.
Is “U1000” detected?

YES

>> Refer to 

LAN-17, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-53, "Intermittent Incident"

.

DTC

Display contents of 

CONSULT

Diagnostic item is detected when...

Probable malfunction location

U1000

CAN COMM CIRCUIT

When VSP control unit is not transmitting or 
receiving CAN communication signal for 2 
seconds or more.

CAN communication

U1010 CONTROL UNIT (CAN)

VSP-43

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

VSP

N

O

P

U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000010121580

Initial diagnosis of VSP control unit.

DTC Logic

INFOID:0000000010121581

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000010121582

1.

PERFORM SELF DIAGNOSTIC

1. Turn power switch ON.

2. Perform self-diagnosis with CONSULT.

3. Check if the DTC “U1010” is detected in self-diagnosis results of “VSP”.
Is “U1010” detected?

YES

>> Replace VSP control unit. Refer to 

VSP-67, "Removal and Installation"

.

NO

>> INSPECTION END

DTC

Display contents of CON-

SULT

Diagnostic item is detected when...

Probable malfunction location

U1010

CONTROL UNIT (CAN)

When detecting error during the initial diagno-
sis of the CAN controller of VSP control unit.

VSP control unit