Infiniti EX35. Manual - part 402

C C S

U1000 CAN COMM CIRCUIT

CCS-143

< COMPONENT DIAGNOSIS >

[LDW & LDP]

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U1000 CAN COMM CIRCUIT

Description

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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 units, 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 the required data only.
CAN Communication Signal Chart. Refer to 

LAN-27, "CAN Communication Signal Chart"

.

DTC Logic

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DTC DETECTION LOGIC

Diagnosis Procedure

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1.

ERASE DTC

Erase DTC memory of the lane camera unit with self-diagnosis of CONSULT-III.

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS OF LANE CAMERA UNIT

Perform the self-diagnosis of the lane camera unit with CONSULT-III.
Is “U1000” displayed?

YES

>> Refer to 

LAN-18, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-38, "Intermittent Incident"

.

DTC 

No.

Trouble diagnosis name

DTC detecting condition

DTC erase conditions

Possible cause

U1000

CAN COMM CIRCUIT

When lane camera unit is not trans-
mitting or receiving CAN communica-
tion signal for 2 seconds or more.

Erase DTC with CONSULT-III

CAN communication

CCS-144

< COMPONENT DIAGNOSIS >

[LDW & LDP]

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

DTC Logic

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DTC DETECTION LOGIC

Diagnosis Procedure

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1.

ERASE DTC

Erase DTC memory of lane camera unit with self-diagnosis of CONSULT-III.

Is the DTC “U1010” erased?

YES

>> INSPECTION END

NO

>> Replace the lane camera unit.

DTC 

No.

Trouble diagnosis name

DTC detecting condition

DTC erase conditions

Possible cause

U1010

CONTROL UNIT (CAN)

Lane camera unit detected internal 
CAN communication circuit malfunc-
tion.

Erase DTC with CONSULT-III

Lane camera unit

CCS

U0122 VDC CAN CIR1 (LDP)

CCS-145

< COMPONENT DIAGNOSIS >

[LDW & LDP]

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U0122 VDC CAN CIR1 (LDP)

DTC Logic

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DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC ERASE

Erase the DTC memory of lane camera unit with CONSULT-III.

>> GO TO 2.

2.

DTC CONFIRMATION

1.

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

2.

Perform the self-diagnosis of lane camera unit with CONSULT-III.

Is the DTC “U0122” detected?

YES

>> Refer to 

CCS-145, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-38, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000003514594

1.

PERFORM SELF-DIAGNOSIS OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Perform self-diagnosis of ABS actuator and electric unit (control unit) with CONSULT-III.

Is any DTC detected?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) TROUBLE DIAGNOSIS

Perform trouble diagnosis of ABS actuator and electric unit (control unit). Refer to 

CCS-185, "DTC No. Index"

.

>> GO TO 3.

3.

ERASE DTC

Erase DTC memory of lane camera unit with self-diagnosis of CONSULT-III.

Is the DTC “U0122” erased?

YES

>> INSPECTION END

NO

>> Replace the lane camera unit.

4.

PROVISIONAL REPLACEMENT OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Remove ABS actuator and electric unit (control unit). Install the normal ABS actuator and electric unit (control
unit).

>> GO TO 5.

5.

ERASE DTC

Erase DTC memory of lane camera unit with self-diagnosis of CONSULT-III.
Is the DTC “U0122” erased?

YES

>> Replace ABS actuator and electric unit (control unit).

DTC 

No.

Trouble diagnosis 

name

DTC detecting condition

DTC erase conditions

Possible cause

U0122

VDC CAN CIR1 (LDP)

Lane camera unit detected an error of 
CAN communication signal that was 
received from ABS actuator and elec-
tric unit (control unit).

Erase DTC with CON-
SULT-III

• ABS actuator and electric 

unit (control unit)

• Lane camera unit

CCS-146

< COMPONENT DIAGNOSIS >

[LDW & LDP]

U0122 VDC CAN CIR1 (LDP)

NO

>> Replace the lane camera unit.