Infiniti G35 (V35) Sedan. Manual - part 1173

B2555 STOP LAMP

SEC-47

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

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B2555 STOP LAMP

Description

INFOID:0000000000961356

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:0000000000961357

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-47, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000000961358

1.

CHECK STOP LAMP SWITCH INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect BCM harness 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.

2.

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

1.

Disconnect stop lamp switch harness connector.

2.

Check voltage between stop lamp harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness for open or short between stop lamp switch and fuse.

3.

CHECK STOP LAMP SWITCH CIRCUIT

1.

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

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

BCM

Ground

Voltage [V]

Connector

Terminal

M123

116

Ground

Battery voltage

Stop lamp switch

Ground

Voltage [V]

Connector

Terminal

M110

1

Ground

Battery voltage

SEC-48

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2555 STOP LAMP

2.

Check continuity between stop lamp switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK STOP LAMP SWITCH

Refer to 

SEC-48, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace stop lamp switch.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END.

Component Inspection

INFOID:0000000000961359

1.

CHECK STOP LAMP SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect stop lamp switch harness connector.

3.

Check continuity between stop lamp switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Replace stop lamp switch.

Stop lamp switch

BCM

Continuity

Connector

Terminal

Connector

Terminal

E110

2

M123

118

Existed

Stop lamp switch

Ground

Continuity

Connector

Terminal

E110

2

Ground

Not existed

Stop lamp switch

Condition

Continuity

Connector

Terminal

E110

1

2

Brake pedal

Not depressed

Not existed

Depressed

Existed

B2556 PUSH-BUTTON IGNITION SWITCH

SEC-49

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

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B2556 PUSH-BUTTON IGNITION SWITCH

Description

INFOID:0000000000961360

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:0000000000961361

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-49, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000000961362

1.

CHECK PUSH-BUTTON IGNITION SWITCH INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect push-button ignition switch harness connector.

3.

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

Is the inspection normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK PUSH-BUTTON IGNITION SWITCH

Refer to 

SEC-50, "Component Inspection"

.

Is the inspection normal?

YES

>> GO TO 3.

NO

>> Replace push-button ignition switch. Refer to 

SEC-207, "Removal and Installation"

.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END.

4.

CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT FOR SHORT

1.

Disconnect BCM harness connector M122 and IPDM E/R harness connector E5.

2.

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

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2556

PUSH-BUTTON IG-
NITION SWITCH

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

• Harness or connectors

(Push-button ignition switch circuit is shorted.)

• Push-button ignition switch

Push-button ignition switch

Ground

Voltage [V]

Connector

Terminal

M50

4

Ground

Battery voltage

SEC-50

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2556 PUSH-BUTTON IGNITION SWITCH

Is the inspection normal?

YES

>> Replace BCM. Refer to 

BCS-79, "Removal and Installation"

.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000000961363

1.

CHECK PUSH-BUTTON IGNITION SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect push-button ignition switch harness connector.

3.

Check continuity between push-button ignition switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Replace push-button ignition switch.

Push-button ignition switch

Ground

Continuity

Connector

Terminal

M50

4

Ground

Not existed

Push-button ignition switch

Condition

Continuity

Connector

Terminal

M50

1

4

Pressed

Existed

Not pressed

Not existed