Infiniti QX56 (Z62). Manual - part 1171

SEC-74

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2555 STOP LAMP

Is the inspecting result normal?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

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

5.

CHECK STOP LAMP SWITCH CIRCUIT

1.

Disconnect stop lamp switch connector.

2.

Check continuity between stop lamp switch harness connector and BCM harness connector.

3.

Check continuity between stop lamp switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness.

6.

CHECK STOP LAMP SWITCH

Refer to 

SEC-74, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace stop lamp switch. Refer to 

BR-20, "Removal and Installation"

.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000006226224

1.

CHECK STOP LAMP SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect stop lamp switch connector.

3.

Check continuity between stop lamp switch terminals.

(+)

(–)

Condition

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M68

9

Ground

Brake pedal

Depressed

Battery voltage

Not depressed

0

Stop lamp switch

BCM

Continuity

Connector

Terminal

Connector

Terminal

E115

2

M68

9

Existed

Stop lamp switch

Ground

Continuity

Connector

Terminal

E115

2

Not existed

B2555 STOP LAMP

SEC-75

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace stop lamp switch. Refer to 

BR-20, "Removal and Installation"

.

Stop lamp switch

Condition

Continuity

Terminal

1

2

Brake pedal

Not depressed

Not existed

Depressed

Existed

SEC-76

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2556 PUSH-BUTTON IGNITION SWITCH

B2556 PUSH-BUTTON IGNITION SWITCH

DTC Logic

INFOID:0000000006226225

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Press push-button ignition switch under the following condition.

-

Brake pedal: Not depressed

2.

Release push-button ignition switch and wait 100 seconds or more. 

3.

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

Is DTC detected?

YES

>> Go to 

SEC-76, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006226226

1.

CHECK PUSH-BUTTON IGNITION SWITCH INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect push-button ignition switch connector.

3.

Check voltage between push-button ignition switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 2.

2.

CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT

1.

Disconnect BCM connector and IPDM E/R connector.

2.

Check continuity between push-button ignition switch harness connector and BCM harness connector.

3.

Check continuity between push-button ignition switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2556

PUSH-BTN IGN SW

BCM detects the push-button ignition switch 
stuck at ON for 100 seconds or more.

• Harness or connectors

(Push-button ignition switch circuit is 
shorted.)

• Push-button ignition switch
• BCM

(+)

(–)

Voltage (V)

(Approx.)

Push-button ignition switch

Connector

Terminal

M101

4

Ground

12

Push-button ignition switch

BCM

Continuity

Connector

Terminal

Connector

Terminal

M101

4

M71

100

Existed

Push-button ignition switch

Ground

Continuity

Connector

Terminal

M101

4

Not existed

B2556 PUSH-BUTTON IGNITION SWITCH

SEC-77

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

3.

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

4.

CHECK PUSH-BUTTON IGNITION SWITCH GROUND CIRCUIT

Check continuity between push-button ignition switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness.

5.

CHECK PUSH-BUTTON IGNITION SWITCH

Refer to 

SEC-77, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace push-button ignition switch. Refer to 

SEC-156, "Removal and Installation"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000006226227

1.

CHECK PUSH-BUTTON IGNITION SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect push-button ignition switch connector.

3.

Check continuity between push-button ignition switch terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace push-button ignition switch. Refer to 

SEC-156, "Removal and Installation"

.

Push-button ignition switch

Ground

Continuity

Connector

Terminal

M101

1

Existed

Push-button ignition switch

Condition

Continuity

Terminal

1

4

Push-button ignition 
switch

Pressed

Existed

Not pressed

Not existed