Infiniti QX56 (Z62). Manual - part 1179

 

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Infiniti QX56 (Z62). Manual - part 1179

 

 

SEC-106

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B26E9 STEERING STATUS

B26E9 STEERING STATUS

DTC Logic

INFOID:0000000006226260

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.

Turn ignition switch ON.

5.

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

Is DTC detected?

YES

>> Refer to 

SEC-106, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226261

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 B26E9. Refer to 

SEC-106, "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

B26E9

LOCK MALFUNCTION

BCM activates steering lock but steering state that 
BCM recognizes is unlock.

Steering lock unit 

B26EF STEERING LOCK RELAY

SEC-107

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B26EF STEERING LOCK RELAY

DTC Logic

INFOID:0000000006226262

DTC DETECTION LOGIC

NOTE:
• If DTC B26EF is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-70, "DTC Logic"

.

• If DTC B26EF 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.

Shift selector lever to the P position.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF.

4.

Press driver side door switch and wait 2 seconds or more.

5.

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

Is DTC detected?

YES

>> Go to 

SEC-107, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226263

1.

CHECK DTC OF IPDM E/R

Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?

YES

>> Perform the diagnosis procedure related to the detected DTC. Refer to 

PCS-22, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK STEERING LOCK UNIT POWER SUPPLY

Check voltage between steering lock unit harness connector and ground.

NOTE:

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B26EF

STRG LCK RELAY OFF

BCM requests IPDM E/R to turn steering lock 
relay ON, but BCM cannot receive steering 
lock relay ON state signal from IPDM E/R 
(CAN) within 2 seconds.

• Harness or connectors 

(CAN communication line is open 
or shorted.)

• Harness or connector

(Steering lock unit circuit is open or 
shorted.)

• Steering lock unit
• IPDM E/R

(+)

(–)

Condition

Voltage (V)

(Approx.)

Steering lock unit

Connector

Terminal

M12

1

Ground

Ignition switch 
OFF

A few seconds after 
opening the driver door

Battery voltage

Ignition switch 
LOCK

Press the push-button 
ignition switch

Battery voltage

Ignition switch ACC or ON

0

SEC-108

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B26EF STEERING LOCK RELAY

Is the inspection normal?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

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

4.

CHECK STEERING LOCK RELAY CIRCUIT

1.

Disconnect IPDM E/R connector and steering lock unit connector.

2.

Check continuity between IPDM E/R harness connector and steering lock unit harness connector.

3.

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

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-32, "Removal and Installation"

.

NO

>> Repair or replace harness.

To lock the steering

1.

Set the selector lever in the P position.

2.

Turn the power supply position to the OFF position.

3.

Press any door switch.

To unlock the steering

1.

Set the selector lever in the P position.

2.

Press the push-button ignition switch with brake pedal not depressed.

IPDM E/R

Steering lock unit

Continuity

Connector

Terminal

Connector

Terminal

E14

46

M12

1

Existed

IPDM E/R

Ground

Continuity

Connector

Terminal

E14

46

Not existed

B26F0 STEERING LOCK RELAY

SEC-109

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B26F0 STEERING LOCK RELAY

DTC Logic

INFOID:0000000006226264

DTC DETECTION LOGIC

NOTE:
• If DTC B26F0 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-70, "DTC Logic"

.

• If DTC B26F0 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.

Shift selector lever to the P position.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF.

4.

Press driver side door switch and wait 2 seconds or more.

5.

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

Is DTC detected?

YES

>> Go to 

SEC-109, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226265

1.

CHECK DTC OF IPDM E/R

Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?

YES

>> Perform the diagnosis procedure related to the detected DTC. Refer to 

PCS-22, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK STEERING LOCK UNIT POWER SUPPLY

Check voltage between steering lock unit harness connector and ground.

NOTE:

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B26F0

STRG LCK RELAY ON

BCM requests IPDM E/R to turn steering lock 
relay OFF, but BCM cannot receive steering 
lock relay OFF state signal from IPDM E/R 
(CAN) within 2 seconds.

• Harness or connectors 

(CAN communication line is open 
or shorted.)

• Harness or connector

(Steering lock unit circuit is open or 
shorted.)

• Steering lock unit
• IPDM  E/R

(+)

(–)

Condition

Voltage (V)

(Approx.)

Steering lock unit

Connector

Terminal

M12

1

Ground

Ignition switch 
OFF

A few seconds after 
opening the driver door

Battery voltage

Ignition switch 
LOCK

Press the push-button 
ignition switch

Battery voltage

Ignition switch ACC or ON

0

 

 

 

 

 

 

 

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