Nissan Maxima. Manual — part 180

AV-540

< DTC/CIRCUIT DIAGNOSIS >

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U1000 CAN COMM CIRCUIT

DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000009471444

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

tiplex communication line with high data communication speed and excellent error detection ability. Many elec-

tronic control units are equipped onto a vehicle 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, CAN-L) allowing a high rate of information transmission with less wiring. Each

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

DTC Logic

INFOID:0000000009471445

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000009471446

1.

PERFORM SELF DIAGNOSTIC

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

2. Check “Self Diagnostic Result” of “AV Control Unit”.
Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to LAN system. Refer to

LAN-15, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to GI section. Refer to

GI-41, "Intermittent Incident"

.

DTC

Display contents of CON-

SULT

DTC detection condition

Probable malfunction location

U1000

CAN COMM CIRCUIT
[U1000]

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

CAN communication system.

AV

U1010 CONTROL UNIT (CAN)

AV-541

< DTC/CIRCUIT DIAGNOSIS >

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C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

U1010 CONTROL UNIT (CAN)

DTC Logic

INFOID:0000000009471447

DTC DETECTION LOGIC

DTC

Display contents of CON-

SULT

DTC detection condition

Probable malfunction factor

U1010

CONTROL UNIT (CAN)
[U1010]

CAN initial diagnosis malfunction is detected.

Replace the AV control unit if the malfunction
occurs constantly. Refer to

AV-652, "Removal

and Installation"

.

AV-542

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U1200 AV CONTROL UNIT

U1200 AV CONTROL UNIT

DTC Logic

INFOID:0000000009471448

DTC

Display contents of

CONSULT

DTC detection condition

Possible malfunction factor

U1200

Cont Unit
[U1200]

AV control unit malfunction is detected.

Replace the AV control unit if the mal-
function occurs constantly. Refer to

AV-652, "Removal and Installation"

.

AV

U1201 AV CONTROL UNIT

AV-543

< DTC/CIRCUIT DIAGNOSIS >

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C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

U1201 AV CONTROL UNIT

DTC Logic

INFOID:0000000009471449

DTC

Display contents of

CONSULT

DTC detection condition

Possible malfunction factor

U1201

GYRO NO CONN
[U1201]

AV control unit malfunction is detected.

Replace the AV control unit if the mal-
function occurs constantly. Refer to

AV-652, "Removal and Installation"

.