Infiniti QX56 (Z62). Manual - part 1181

SEC-114

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B26F5 STEERING LOCK STATUS SWITCH

NO

>> GO TO 2.

2.

CHECK IPDM E/R INPUT SIGNAL 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

>> GO TO 3.

NO

>> Repair or replace harness.

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 BCM INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Check voltage between BCM harness connector and ground.

NOTE:

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 6.

5.

REPLACE BCM

1.

Replace BCM. Refer to 

BCS-81, "Removal and Installation"

.

2.

Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

IPDM E/R

Steering lock unit

Continuity

Connector

Terminal

Connector

Terminal

E17

63

M12

8

Existed

65

3

IPDM E/R

Ground

Continuity

Connector

Terminal

E17

63

Not existed

65

(+)

(–)

Condition

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M71

107

Ground

Steering lock unit

Lock

0

Unlock

12

108

Lock

12

Unlock

0

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.

B26F5 STEERING LOCK STATUS SWITCH

SEC-115

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

>> INSPECTION END

6.

CHECK BCM INPUT SIGNAL CIRCUIT

1.

Disconnect BCM connector and steering lock unit connector.

2.

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

3.

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace harness.

7.

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

BCM

Steering lock unit

Continuity

Connector

Terminal

Connector

Terminal

M71

107

M12

3

Existed

108

8

BCM

Ground

Continuity

Connector

Terminal

M71

107

Not existed

108

SEC-116

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B26F7 BCM

B26F7 BCM

DTC Logic

INFOID:0000000006226272

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Press door request switch.

2.

Turn ignition switch ON.

3.

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

Is DTC detected?

YES

>> Go to 

SEC-117, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226273

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 B26F7. Refer to 

SEC-116, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 2.

NO

>> INSPECTION END

2.

REPLACE BCM

1.

Replace BCM. Refer to 

BCS-81, "Removal and Installation"

.

2.

Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B26F7

BCM

Inside key antenna output circuit in BCM is malfunctioning.

BCM

B26F8 BCM

SEC-117

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B26F8 BCM

DTC Logic

INFOID:0000000006226274

DTC DETECTION LOGIC

NOTE:
DTC B26F8 can be detected even though the related circuit is not used in this vehicle.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait 1 second.

2.

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

Is DTC detected?

YES

>> Go to 

SEC-117, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226275

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 B26F8.
Refer to 

SEC-117, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 2.

NO

>> INSPECTION END

2.

REPLACE BCM

1.

Replace BCM. Refer to 

BCS-81, "Removal and Installation"

.

2.

Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B26F8

BCM

Starter control replay control signal and feedback circuit 
signal (inside BCM) does not match.

BCM