Nissan Frontier D40. Manual — part 215

U1000 CAN COMM CIRCUIT

DLK-23

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000005274495

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 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-48, "CAN Communication Signal Chart"

.

DTC Logic

INFOID:0000000005274496

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000005274497

1.

PERFORM SELF DIAGNOSTIC

1.

Turn ignition switch ON and wait for 2 second or more.

2.

Check “Self Diagnostic Result”.

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to

DLK-23, "Diagnosis Procedure"

.

NO

>> Refer to

GI-46, "Intermittent Incident"

.

DTC

CONSULT-III display

description

DTC Detection Condition

Possible cause

U1000

CAN COMM CIRCUIT

When BCM cannot communicate CAN com-
munication signal continuously for 2 sec-
onds or more.

In CAN communication system, any item (or items)
of the following listed below is malfunctioning.
• Transmission
• Receiving (ECM)
• Receiving (VDC/TCS/ABS)
• Receiving (METER/M&A)
• Receiving (TCM)

DLK-24

< COMPONENT DIAGNOSIS >

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

DTC Logic

INFOID:0000000005274498

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000005274499

1.

REPLACE BCM

When DTC [U1010] is detected, replace BCM.

>> Replace BCM. Refer to

BCS-54, "Removal and Installation"

.

Special Repair Requirement

INFOID:0000000005274500

1.

REQUIRED WORK WHEN REPLACING BCM

The BCM must be initialized when replaced. Refer to (Body Control System) for BCM configuration.
Initialize NVIS by CONSULT-III. For the details of initialization refer to CONSULT-III Operation Manual.

>> Work End.

DTC

CONSULT-III display de-

scription

DTC Detection Condition

Possible cause

U1010

CONTROL UNIT (CAN)

BCM detected internal CAN communication circuit malfunction.

BCM

POWER SUPPLY AND GROUND CIRCUIT

DLK-25

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000005548418

Regarding Wiring Diagram information, refer to

BCS-46, "Wiring Diagram"

.

1.

CHECK FUSES AND FUSIBLE LINK

Check that the following fuses and fusible link are not blown.

Is the fuse blown?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit.

NO

>> GO TO 2

2.

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM.

3.

Check voltage between BCM harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

CHECK GROUND CIRCUIT

Terminal No.

Signal name

Fuses and fusible link No.

57

Battery power supply

18 (10A)

70

G (50A)

11

Ignition ACC or ON

4 (10A)

38

Ignition ON or START

1 (10A)

Connector

Terminals

Power

source

Condition

Voltage (V) (Ap-

prox.)

(+)

(-)

M18

11

Ground

ACC

power

supply

Ignition

switch

ACC or

ON

Battery voltage

38

Ground

Ignition

power

supply

Ignition

switch ON

or START

Battery voltage

M20

57

Ground

Battery

power

supply

Ignition

switch

OFF

Battery voltage

70

Ground

Battery

power

supply

Ignition

switch

OFF

Battery voltage

LIIA2415E

DLK-26

< COMPONENT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair or replace harness.

BCM

Ground

Continuity

Connector

Terminal

M20

67

Yes

LIIA0915E