Infiniti G35 (V35) Sedan. Manual — part 204

BCS

U1000 CAN COMM CIRCUIT

BCS-33

< COMPONENT DIAGNOSIS >

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COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000000963890

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-28, "CAN Communication Signal Chart"

.

DTC Logic

INFOID:0000000000963891

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000000963892

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

LAN-18, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to

GI-39, "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)
• Receiving (MULTI AV)
• Receiving (IPDM E/R)

BCS-34

< COMPONENT DIAGNOSIS >

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

DTC Logic

INFOID:0000000000963893

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000000963894

1.

REPLACE BCM

When DTC [U1010] is detected, replace BCM.

>> Replace BCM.

Special Repair Requirement

INFOID:0000000000963895

1.

REQUIRED WORK WHEN REPLACING BCM

Initialize IVIS by CONSULT-III. For the details of initialization refer to CONSULT-III operation manual NATS-
IVIS/NVIS.

>> 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

BCS

U0415 VEHICLE SPEED SIG

BCS-35

< COMPONENT DIAGNOSIS >

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U0415 VEHICLE SPEED SIG

Description

INFOID:0000000000963896

U0415 is displayed if any unusual condition is present in the reception status of the vehicle speed signal from
the ABS actuator and electric unit (control unit).

DTC Logic

INFOID:0000000000963897

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION

1.

Erase the DTC.

2.

Turn ignition switch OFF.

3.

Perform the “Self-Diag Results” of CONSULT-III, when passed 2 seconds or more after the ignition switch
is turned ON.

Is any DTC detected?

YES

>> Refer to

BCS-35, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000000963898

1.

ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAG RESULTS

Perform “Self-Diag Results” of ABS actuator and electric unit (control unit) with CONSULT-III. Refer to

TM-

114, "CONSULT-III Function (TRANSMISSION)"

.

Is any DTC detected?

YES

>> Repair or replace the malfunctioning part.

NO

>> Replace BCM.

DTC

CONSULT-III display

description

DTC Detection Condition

Probable cause

U0415

VEHICLE SPEED SIG

When the vehicle speed signal received from
the ABS actuator and electric unit (control
unit) remains abnormal for 2 seconds or more.

• ABS actuator and electric unit (control unit)
• BCM

BCS-36

< COMPONENT DIAGNOSIS >

B2562 LOW VOLTAGE

B2562 LOW VOLTAGE

DTC Logic

INFOID:0000000000963899

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION

1.

Erase DTC.

2.

Turn ignition switch OFF.

3.

Perform the “Self-Diag Results” of CONSULT-III, when passed 1.5 seconds or more after the ignition
switch is turned ON.

Is any DTC detected?

YES

>> Refer to

BCS-36, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000000963900

1.

CHECK POWER SUPPLY CIRCUIT

Check BCM power supply circuit. Refer to

BCS-38, "Diagnosis Procedure"

.

Is the circuit normal?

YES

>> Replace BCM.

NO

>> Repair the malfunctioning part.

Special Repair Requirement

INFOID:0000000000963901

1.

REQUIRED WORK WHEN REPLACING BCM

Initialize IVIS by CONSULT-III. For the details of initialization refer to CONSULT-III operation manual NATS-
IVIS/NVIS.

>> Work end.

DTC

CONSULT-III display

description

DTC Detection Condition

Possible cause

B2562

LOW VOLTAGE

When the power supply voltage to BCM remains less
than 8.8 V for 1.5 seconds or more

Harness or connector (power supply
circuit)