Infiniti G35 (V35) Sedan. Manual - part 1172

B2013 ID DISCORD, IMMU-STRG

SEC-43

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

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B2013 ID DISCORD, IMMU-STRG

Description

INFOID:0000000000961350

BCM performs the ID verification with the steering lock unit and releases the steering lock if both BCM and
steering lock unit ID are same. BCM starts the communication with the steering lock unit when Intelligent Key
is carried into the passenger compartment and the push-button ignition switch is pressed.

DTC Logic

INFOID:0000000000961351

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Lock steering.

2.

Press the push-button ignition switch

3.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-43, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000000961352

1.

PERFORM INITIALIZATION

Perform initialization with CONSULT-III. Re-register all Intelligent Keys.
For initialization and registration of Intelligent Key. Refer to “CONSULT-III Operation Manual NATS-IV/S/
NVIS”.
Can the system be initialized and can steering lock be released with re-registered Intelligent Key?

YES

>> Steering lock unit was unregistered.

NO

>>

BCM is malfunctioning.

• Replace BCM
• Perform initialization again

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2013

ID DISCORD, IMMU-
STRG

The ID verification results between BCM and steer-
ing control unit are NG. The registration is neces-
sary.

• Steering wheel lock unit

SEC-44

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2014 CHAIN OF STRG-IMMU

B2014 CHAIN OF STRG-IMMU

Description

INFOID:0000000000961353

BCM performs the ID verification with the steering lock unit to release the steering. BCM starts the communi-
cation with the steering lock unit when Intelligent Key is carried into the passenger compartment and the push-
button ignition switch is pressed.

DTC Logic

INFOID:0000000000961354

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Lock steering.

2.

Press the push-button ignition switch.

3.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-44, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000000961355

1.

CHECK STEERING LOCK UNIT POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect steering lock unit harness connector.

3.

Check voltage between steering lock unit harness connector and ground.

Is the inspection normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK STEERING LOCK UNIT POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM harness connector M122.

3.

Check continuity between steering lock unit harness connector and BCM harness connector.

4.

Check continuity between steering lock unit harness connector and ground.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2014

CHAIN OF STRG-
IMMU

Inactive communication between steering 
control unit and BCM

• Harness or connectors

(steering lock unit circuit is open or short-
ed)

• Steering lock unit
• BCM

Steering lock unit

Ground

Ignition switch position

Voltage [V]

Connector

Terminal

M40

7

Ground

OFF or ACC

Battery voltage

ON

0

Steering lock unit

BCM

Continuity

Connector

Terminal

connector

Terminal

M40

7

M122

106

Existed

B2014 CHAIN OF STRG-IMMU

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[INTELLIGENT KEY SYSTEM]

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Is the inspection normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

3.

CHECK STEERING LOCK UNIT GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between steering lock unit and ground.

Is the inspection normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK STEERING LOCK UNIT COMMUNICATION SIGNAL

1.

Connect steering lock unit harness connector.

2.

Read voltage signal between steering lock unit harness connector and ground.

Is the inspection normal?

YES

>> Replace steering lock unit.

NO

>> GO TO 5.

5.

CHECK STEERING LOCK UNIT COMMUNICATION CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM harness connector M122.

3.

Check continuity between steering lock unit harness connector and BCM harness connector.

Steering lock unit

Ground

Continuity

Connector

Terminal

M40

7

Ground

Not existed

Steering lock unit

Ground

Continuity

Connector

Terminal

M40

5

Ground

Existed

6

Steering lock unit

Ground

Steering lock unit condi-

tion

Value

Connector

Terminal

M40

2

Ground

Lock

Battery voltage

Lock or unlock

For 15 seconds after un-

lock

Battery voltage

15 seconds or later after 

unlock.

0 V

Steering is locked

: Opening the door when ignition switch is ON to OFF.

Steering is unlocked

: Ignition switch is OFF to ACC.

JMKIA0066GB

Steering lock unit

BCM

Continuity

Connector

Terminal

connector

Terminal

M40

2

M122

111

Existed

SEC-46

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2014 CHAIN OF STRG-IMMU

4.

Check continuity between steering lock unit harness connector and ground.

Is the inspection normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END.

Steering lock unit

Ground

Continuity

Connector

Terminal

M40

2

Ground

Not existed