Infiniti QX56 (Z62). Manual - part 1180

 

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Infiniti QX56 (Z62). Manual - part 1180

 

 

SEC-110

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B26F0 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

B26F3 STARTER CONTROL RELAY

SEC-111

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B26F3 STARTER CONTROL RELAY

DTC Logic

INFOID:0000000006226266

DTC DETECTION LOGIC

NOTE:
• If DTC B26F3 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-70, "DTC Logic"

.

• If DTC B26F3 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.

Press push-button ignition switch under the following conditions to start engine.

-

Selector lever: In the P position

-

Brake pedal: Depressed

2.

Wait 2 seconds after engine started.

3.

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

Is DTC detected?

YES

>> Go to 

SEC-111, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226267

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 INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B26F3

START CONT RLY ON

BCM requests IPDM E/R to turn starter 
control relay OFF, but BCM cannot receive 
starter control relay OFF state signal from 
IPDM E/R (CAN).

• Harness or connectors 

(CAN communication line is open or 
shorted.)

• IPDM  E/R

SEC-112

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B26F4 STARTER CONTROL RELAY

B26F4 STARTER CONTROL RELAY

DTC Logic

INFOID:0000000006226268

DTC DETECTION LOGIC

NOTE:
• If DTC B26F4 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-70, "DTC Logic"

.

• If DTC B26F4 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.

Press push-button ignition switch under the following conditions to start engine, and wait 1 second or
more.

-

Selector lever: In the P position

-

Brake pedal: Depressed

2.

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

Is DTC detected?

YES

>> Go to 

SEC-112, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226269

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 INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B26F4

START CONT RELAY 
OFF

BCM requests IPDM E/R to turn starter control 
relay ON, but BCM cannot receive starter control 
relay ON state signal from IPDM E/R.

• Harness or connectors 

(CAN communication line is open 
or shorted.)

• IPDM E/R

B26F5 STEERING LOCK STATUS SWITCH

SEC-113

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B26F5 STEERING LOCK STATUS SWITCH

DTC Logic

INFOID:0000000006226270

DTC DETECTION LOGIC

NOTE:
• If DTC B26F5 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-70, "DTC Logic"

.

• If DTC B26F5 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.

5.

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

Is DTC detected?

YES

>> Go to 

SEC-113, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226271

1.

CHECK IPDM E/R INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

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

NOTE:

Is the inspection result normal?

YES

>> GO TO 4.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B26F5

STRG LCK STS SW

When BCM performs steering lock request 
to IPDM E/R, steering lock state signal 
from IPDM E/R is already lock state.

• Harness or connectors 

(CAN communication line is open or 
shorted.)

• Harness or connectors

(Steering lock unit circuit is open or 
shorted.)

• Steering lock unit 
• IPDM  E/R
• BCM

(+)

(–)

Condition

Voltage (V)

(Approx.)

IPDM E/R

Connector

Terminal

E17

63

Ground

Steering lock unit

Lock

12

Unlock

0

65

Lock

0

Unlock

12

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.

 

 

 

 

 

 

 

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