Infiniti G35 (V35) Sedan. Manual - part 1170

 

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Infiniti G35 (V35) Sedan. Manual - part 1170

 

 

U1000 CAN COMM CIRCUIT

SEC-35

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

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COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000000961332

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:0000000000961333

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000000961334

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)

SEC-36

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

DTC Logic

INFOID:0000000000961335

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000000961336

1.

REPLACE BCM

When DTC [U1010] is detected, replace BCM.

>> Replace BCM.

Special Repair Requirement

INFOID:0000000000961337

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

B2190, P1610 NATS ANTENNA AMP

SEC-37

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

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B2190, P1610 NATS ANTENNA AMP

Description

INFOID:0000000000961338

Performs ID verification through BCM and Intelligent Key when push-button ignition switch is pressed.
Prohibits the release of steering lock or start of engine when an unregistered ID of Intelligent Key is used.

DTC Logic

INFOID:0000000000961339

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Insert Intelligent Key into the key slot.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-37, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Press the push-button ignition switch.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-37, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000000961340

1.

 INSPECTION START

Check the case in which DTC is detected.
• Case1: It is detected when Intelligent Key is inserted into key slot.
• Case2: It is detected after Intelligent Key is inserted into key slot and push-button ignition switch is pressed.
In which case is DTC detected?

Case1. >> GO TO 2.
Case2. >> GO TO 4.

2.

CHECK KEY SLOT INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect key slot harness connector.

3.

Check voltage between key slot harness connector and ground.

Is the inspection result normal?

YES

>> Replace key slot.

NO

>> GO TO 3.

3.

CHECK KEY SLOT CIRCUIT

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2190

NATS ANTENNA 
AMP

Inactive communication between key slot and 
BCM.

• Harness or connectors

(The key slot circuit is open or 
shorted)

• Key slot 
• BCM

P1610

Key slot

Ground

Voltage [V]

(approx.)

Connector

Terminal

M22

2

Ground

Battery voltage

SEC-38

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2190, P1610 NATS ANTENNA AMP

1.

Disconnect BCM harness connector M122.

2.

Check continuity between key slot harness connector and BCM harness connector.

3.

Check continuity between key slot harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair harness or connector.

4.

CHECK PUSH-IGNITION SWITCH OPERATION

Press push-button ignition switch and check if it turns ON.

Does ignition switch turn to ON?

YES

>> GO TO 5.

NO

>> GO TO 7.

5.

CHECK KEY SLOT COMMUNICATION SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect key slot harness connector.

3.

Check voltage between key slot harness connector and ground.

Is the inspection result normal?

YES

>> Replace key slot.

NO

>> GO TO 6.

6.

CHECK KEY SLOT COMMUNICATION SIGNAL CIRCUIT

1.

Disconnect BCM harness connector M122.

2.

Check continuity between key slot harness connector and BCM harness connector.

3.

Check continuity between key slot harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair harness or connector.

7.

CHECK KEY SLOT GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect key slot harness connector.

3.

Check continuity between key slot harness connector and ground.

Key slot

BCM

Continuity

Connector

Terminal

Connector

Terminal

M22

2

M122

80

Existed

Key slot

Ground

Continuity

Connector

Terminal

M22

2

Ground

Not existed

Key slot

Ground

Continuity

Connector

Terminal

M22

3

Ground

Existed

Key slot

BCM

Continuity

Connector

Terminal

Connector

Terminal

M22

3

M122

81

Existed

Key slot

Ground

Continuity

Connector

Terminal

M22

3

Ground

Not existed

 

 

 

 

 

 

 

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