Infiniti G35 (V35) Sedan. Manual - part 998

 

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Infiniti G35 (V35) Sedan. Manual - part 998

 

 

PCS-46

< COMPONENT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

U1000 CAN COMM CIRCUIT

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000000964208

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:0000000000964209

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000000964210

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)

PCS

U1010 CONTROL UNIT (CAN)

PCS-47

< COMPONENT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

U1010 CONTROL UNIT (CAN)

DTC Logic

INFOID:0000000000964211

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000000964212

1.

REPLACE BCM

When DTC [U1010] is detected, replace BCM.

>> Replace BCM.

Special Repair Requirement

INFOID:0000000000964213

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

PCS-48

< COMPONENT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B2553 IGNITION RELAY

B2553 IGNITION RELAY

Description

INFOID:0000000000964214

BCM turns ON the following relays to ignition power supply to each ECU when the ignition switch is turned
ON.
• Ignition relay (inside fuse box)
• Ignition relay (inside IPDM E/R)
• Blower fan motor relay
BCM checks any ignition relay ON request for consistency with the actual ignition relay operation status.

DTC Logic

INFOID:0000000000964215

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON under the following conditions, and wait for at least 2 seconds.

-

A/T selector lever is in the P or N position.

-

Release brake pedal.

2.

Check “Self diagnostic result” with CONSULT-III. 

Is DTC detected?

YES

>> Go to 

PCS-48, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000000964216

1.

CHECK DTC WITH IPDM E/R

Check “Self diagnostic result” with CONSULT-III. Refer to 

PCS-31, "DTC Index"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace.

2.

CHECK IGNITION RELAY FEEDBACK INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect BCM harness connector M123.

3.

Check voltage between BCM harness connector and ground under the following conditions.

Is the inspection result normal?

YES

>> Replace BCM? IPDM E/R?

NO

>> GO TO 3.

3.

CHECK IGNITION RELAY FEEDBACK CIRCUIT

1.

Disconnect IPDM E/R harness connector E5.

2.

Check continuity between BCM harness connector and IPDM E/R harness connector.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2553

IGNITION RELAY

BCM detects a difference of signal for 2 seconds or 
more between the following information. 
• Ignition relay (fuse block) ON/OFF operation
• Ignition relay (fuse block) feedback.

• Harness or connectors

(ignition relay feedback circuit is 
open or short)

• IPDM E/R

BCM

Ground

Condition

Voltage [V]

Connector

Terminal

M123

123

Ground

Ignition switch

OFF

0

NO

Battery voltage

PCS

B2553 IGNITION RELAY

PCS-49

< COMPONENT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

3.

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

BCM

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

M123

123

E5

19

Existed

BCM

Ground

Continuity

Connector

Terminal

M123

123

Ground

Not existed

 

 

 

 

 

 

 

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