Infiniti QX56 (Z62). Manual - part 1177

SEC-98

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B260B STEERING LOCK UNIT

B260B STEERING LOCK UNIT

DTC Logic

INFOID:0000000006226247

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.

Shift selector lever to the P position.

5.

Press push-button ignition switch under the following condition.

-

Brake pedal: Not depressed

6.

Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-98, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226248

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Select “Self Diagnostic Result” mode of “BCM” using CONSULT-III.

3.

Touch “ERASE”.

4.

Perform DTC CONFIRMATION PROCEDURE for DTC B260B. Refer to 

SEC-98, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 2.

NO

>> INSPECTION END

2.

REPLACE STEERING LOCK UNIT

1.

Replace steering lock unit.

2.

Perform the service procedure for steering lock unit replacement. Refer to CONSULT-III Operation Man-
ual NATS-IVIS/NVIS.

>> 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

B260C STEERING LOCK UNIT

SEC-99

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B260C STEERING LOCK UNIT

DTC Logic

INFOID:0000000006226249

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Shift selector lever to the P position.

2.

Press push-button ignition switch under the following condition.

-

Brake pedal: Not depressed

3.

Turn ignition switch ON.

4.

Turn ignition switch OFF.

5.

Press driver side door switch.

6.

Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-99, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226250

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Select “Self Diagnostic Result” mode of “BCM” using CONSULT-III.

3.

Touch “ERASE”.

4.

Perform DTC CONFIRMATION PROCEDURE for DTC B260C. Refer to 

SEC-99, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 2.

NO

>> INSPECTION END

2.

REPLACE STEERING LOCK UNIT

1.

Replace steering lock unit.

2.

Perform the service procedure for steering lock unit replacement. Refer to CONSULT-III Operation Man-
ual NATS-IVIS/NVIS.

>> 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

SEC-100

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B260D STEERING LOCK UNIT

B260D STEERING LOCK UNIT

DTC Logic

INFOID:0000000006226251

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Shift selector lever to the P position.

2.

Press push-button ignition switch under the following condition.

-

Brake pedal: Not depressed

3.

Turn ignition switch ON.

4.

Turn ignition switch OFF.

5.

Press driver side door switch.

6.

Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-100, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226252

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Select “Self Diagnostic Result” mode of “BCM” using CONSULT-III.

3.

Touch “ERASE”.

4.

Perform DTC Confirmation Procedure for DTC B260D. Refer to 

SEC-100, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 2.

NO

>> INSPECTION END

2.

REPLACE STEERING LOCK UNIT

1.

Replace steering lock unit.

2.

Perform the service procedure for steering lock unit replacement. Refer to CONSULT-III Operation Man-
ual NATS-IVIS/NVIS.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B260D

STEERING LOCK UNIT

BCM detects malfunctioning of steering lock 
unit after steering locking.

Steering lock unit

B260F ENGINE STATUS

SEC-101

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B260F ENGINE STATUS

Description

INFOID:0000000006226253

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

DTC Logic

INFOID:0000000006226254

DTC DETECTION LOGIC

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

BCS-70, "DTC Logic"

.

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

BCS-71, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait 2 seconds or more.

2.

Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-101, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226255

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Select “Self Diagnostic Result” mode of “BCM” using CONSULT-III.

3.

Touch “ERASE”.

4.

Perform DTC CONFIRMATION PROCEDURE for DTC B260F. Refer to 

SEC-101, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 2.

NO

>> INSPECTION END

2.

REPLACE ECM

1.

Replace ECM. Refer to 

EC-535, "Removal and Installation"

.

2.

Perform “ADDITIONAL SERVICE WHEN REPLACING ECM”. Refer to 

EC-143, "Work Procedure"

.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B260F

ENG STATE SIG LOST

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

• Harness or connectors 

(CAN communication line is open or 
shorted.)

• ECM