Infiniti G37 Coupe. Manual - part 1147

B260B STEERING LOCK UNIT

SEC-85

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B260B STEERING LOCK UNIT

Description

INFOID:0000000001699987

The steering lock unit performs the check by itself according to the steering status.

DTC Logic

INFOID:0000000001699988

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Press the push-button ignition switch, when steering is locked.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-85, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000001699989

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Check “Self diagnostic result” with CONSULT-III.

3.

Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.
See 

SEC-85, "DTC Logic"

.

Is the DTC B260B displayed again?

YES

>> Replace steering lock unit. 

NO

>> INSPECTION END.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B260B

STEERING LOCK 
UNIT

BCM detects malfunctioning of steering lock unit 
before steering unlocking.

• Steering lock unit

SEC-86

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B260C STEERING LOCK UNIT

B260C STEERING LOCK UNIT

Description

INFOID:0000000001699990

The steering lock unit performs the check by itself according to the steering status.

DTC Logic

INFOID:0000000001699991

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF.

3.

Press driver side door switch.

4.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-86, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000001699992

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Check “Self diagnostic result” with CONSULT-III.

3.

Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.
See 

SEC-86, "DTC Logic"

.

Is the DTC B260C displayed again?

YES

>> Replace steering lock unit.

NO

>> INSPECTION END.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B260C

STEERING LOCK 
UNIT

BCM detects malfunctioning of steering lock unit 
before steering locking.

• Steering lock unit

B260D STEERING LOCK UNIT

SEC-87

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B260D STEERING LOCK UNIT

Description

INFOID:0000000001699993

The steering lock unit performs the check by itself according to the steering lock status (before lock, after lock
and unlock).

DTC Logic

INFOID:0000000001699994

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF.

3.

Press driver side door switch.

4.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-87, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000001699995

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Check “Self diagnostic result” with CONSULT-III.

3.

Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.
See 

SEC-87, "DTC Logic"

.

Is the DTC B260D displayed again?

YES

>> Replace steering lock unit.

NO

>> INSPECTION END.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B260D

STEERING LOCK 
UNIT

BCM detects malfunctioning of steering lock unit af-
ter steering locking.

• Steering lock unit

SEC-88

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B260F ENGINE STATUS

B260F ENGINE STATUS

Description

INFOID:0000000001699996

BCM receives the engine status signal from ECM via CAN communication.

DTC Logic

INFOID:0000000001699997

DTC DETECTION LOGIC

NOTE:
• If DTC B260F is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-36, "DTC Logic"

.

• If DTC B260F is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-37, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON under the following conditions.

A/T models

-

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

-

Do not depress brake pedal

M/T models

-

Do not depress clutch pedal

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-88, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001699998

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Check “Self diagnostic result” with CONSULT-III.

3.

Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.
See 

SEC-88, "DTC Logic"

.

Is the DTC B260F displayed again?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

REPLACE ECM

1.

Replace ECM.

2.

Refer to 

EC-16, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (ECM) : Description"

.

>> INSPECTION END

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B260F

INTERRUPTION OF 
ENGINE STATUS 
SIGNAL

BCM is not yet received the engine status signal 
from ECM when ignition switch is in ON position

• ECM