Infiniti FX35, FX50 (S51). Manual - part 1660

 

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Infiniti FX35, FX50 (S51). Manual - part 1660

 

 

B2014 CHAIN OF STRG-IMMU

SEC-53

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

4.

Check continuity between steering lock unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Steering lock unit

BCM

Continuity

Connector

Terminal

Connector

Terminal

M40

2

M122

111

Existed

Steering lock unit

Ground

Continuity

Connector

Terminal

M40

2

Not existed

SEC-54

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2555 STOP LAMP

B2555 STOP LAMP

Description

INFOID:0000000005249458

BCM detects the stop lamp status and confirms the stop lamp switch ON/OFF status. BCM confirms the
engine start condition according to the stop lamp switch ON/OFF status.

DTC Logic

INFOID:0000000005249459

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Depress the brake pedal and wait for at least 1 second.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-54, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249460

1.

CHECK STOP LAMP SWITCH POWER SUPPLY 1

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector M123.

3.

Check voltage between BCM harness connector and ground.

Is the inspection normal?

YES

>> GO TO 2.

NO

>>

Check the following.

• 10A fuse [No. 7, located in the fuse block (J/B)]
• Harness for open or short between BCM and fuse
• If NG, repair or replace fuse or harness

2.

CHECK STOP LAMP SWITCH POWER SUPPLY 2

1.

Disconnect stop lamp switch connector.

2.

Check voltage between stop lamp harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

DTC No.

Trouble diagno-

sis name

DTC detecting condition

Possible cause

B2555

STOP LAMP

BCM makes a comparison between the 
upper voltage and lower voltage of stop 
lamp switch. It judges from their values to 
detect the malfunctioning circuit.

• Harness or connectors

(stop lamp switch circuit is open or shorted)

• Stop lamp switch
• Fuse

(+)

(–)

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M123

116

Ground

Battery voltage

(+)

(–)

Voltage (V)

(Approx.)

Stop lamp switch

Connector

Terminal

E110

3

Ground

Battery voltage

B2555 STOP LAMP

SEC-55

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

NO

>> Check harness for open or short between stop lamp switch and fuse. If NG, repair or replace har-

ness.

3.

CHECK STOP LAMP SWITCH CIRCUIT

1.

Check continuity between stop lamp switch harness connector and BCM harness connector M123.

2.

Check continuity between stop lamp switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness.

4.

CHECK STOP LAMP SWITCH

Refer to 

SEC-55, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace stop lamp switch. Refer to 

BR-18, "Exploded View"

.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005249461

1.

CHECK STOP LAMP SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect stop lamp switch connector.

3.

Check continuity between stop lamp switch terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace stop lamp switch. Refer to 

BR-18, "Exploded View"

.

Stop lamp switch

BCM

Continuity

Connector

Terminal

Connector

Terminal

E110

4

M123

118

Existed

Stop lamp switch

Ground

Continuity

Connector

Terminal

E110

4

Not existed

Stop lamp switch

Condition

Continuity

Terminal

3

4

Brake pedal

Not depressed

Not existed

Depressed

Existed

SEC-56

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2556 PUSH-BUTTON IGNITION SWITCH

B2556 PUSH-BUTTON IGNITION SWITCH

Description

INFOID:0000000005249462

The switch that changes the power supply position. BCM maintains the power supply position status. BCM
changes the power supply position with the operation of the push-button ignition switch.

DTC Logic

INFOID:0000000005249463

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine and wait for at least 100 seconds.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-56, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249464

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 3.

NO

>> GO TO 2.

2.

CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT

1.

Disconnect BCM connector M122 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?

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2556

PUSH-BUTTON IG-
NITION SWITCH

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

M50

4

Ground

Battery voltage

Push-button ignition switch

BCM

Continuity

Connector

Terminal

Connector

Terminal

M50

4

M122

89

Existed

Push-button ignition switch

Ground

Continuity

Connector

Terminal

M50

4

Not existed

 

 

 

 

 

 

 

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