Nissan Altima L32. Instruction — part 1230

SEC-70

< COMPONENT DIAGNOSIS >

[COUPE]

B2555 STOP LAMP

B2555 STOP LAMP

Description

INFOID:0000000004206029

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:0000000004206030

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

>> Refer to

SEC-70, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004206031

1.

CHECK STOP LAMP SWITCH INPUT SIGNAL

1. Turn ignition switch OFF.

2. Disconnect BCM harness connector.

3. Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> Stop lamp switch is OK.

NO

>> GO TO 2

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.

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

Stop lamp

switch position

Voltage [V]

Connector

Terminal

M18

26

Ground

Depressed

Battery volt-

age

Released

0

ALKIA0437ZZ

Stop lamp switch

Ground

Voltage [V]

Connector

Terminal

E38

1

Ground

Battery voltage

ALKIA0438ZZ

B2555 STOP LAMP

SEC-71

< COMPONENT DIAGNOSIS >

[COUPE]

C

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A

B

SEC

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3.

CHECK STOP LAMP SWITCH CIRCUIT

1. Check continuity between stop lamp switch harness connector

E38 (A) terminal 2 and BCM harness connector M18 (B) termi-

nal 26.

2. Check continuity between stop lamp switch harness connector

E38 (A) terminal 2 and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair harness or connector.

4.

CHECK STOP LAMP SWITCH

Refer to

SEC-71, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5

NO

>> Replace stop lamp switch.

5.

CHECK INTERMITTENT INCIDENT

Refer to

GI-42, "Intermittent Incident"

.

>> Inspection End.

Component Inspection

INFOID:0000000004206032

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

A: E38

2

B: M18

26

Yes

Stop lamp switch

Ground

Continuity

Connector

Terminal

A: E38

2

Ground

No

ALKIA0439ZZ

Stop lamp switch

Condition

Continuity

Terminal

1

2

Brake pedal

Not depressed

No

Depressed

Yes

ALKIA0440ZZ

SEC-72

< COMPONENT DIAGNOSIS >

[COUPE]

B2556 PUSH-BUTTON IGNITION SWITCH

B2556 PUSH-BUTTON IGNITION SWITCH

Description

INFOID:0000000004206033

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:0000000004206034

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

>> Refer to

SEC-72, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004206035

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 con-

nector and ground.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> GO TO 4

2.

CHECK PUSH-BUTTON IGNITION SWITCH

Refer to

SEC-73, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Replace push-button ignition switch. Refer to

SEC-208, "Removal and Installation"

.

3.

CHECK INTERMITTENT INCIDENT

Refer to

GI-42, "Intermittent Incident"

.

>> Inspection End.

4.

CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT FOR SHORT

1. Disconnect BCM harness connector and IPDM E/R harness connector.

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

M38

4

Ground

Battery voltage

ALKIA1350ZZ

B2556 PUSH-BUTTON IGNITION SWITCH

SEC-73

< COMPONENT DIAGNOSIS >

[COUPE]

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B

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2. Check continuity between push-button ignition switch harness

connector and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to

BCS-96, "Removal and Installa-

tion"

.

NO

>> Repair harness or connector.

Component Inspection

INFOID:0000000004206036

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. Refer to

SEC-208, "Removal and Installation"

.

Push-button ignition switch

Ground

Continuity

Connector

Terminal

M38

4

Ground

No

ALKIA0442ZZ

ALKIA0443ZZ

Push-button ignition switch

Condition

Continuity

Terminal

1

4

Pressed

Yes

Not pressed

No