Nissan Sentra. Manual - part 762

SEC-76

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2555 STOP LAMP

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace stop lamp switch. Refer to 

BR-22, "Exploded View"

.

Stop lamp switch

Condition

Continuity

Terminal

1

2

Brake pedal

Not depressed

No

Depressed

Yes

B2556 PUSH-BUTTON IGNITION SWITCH

SEC-77

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

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A

B

SEC

N

O

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B2556 PUSH-BUTTON IGNITION SWITCH

DTC Logic

INFOID:0000000009756720

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.
Is DTC detected?

YES

>> Go to 

SEC-77, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009756721

Regarding Wiring Diagram information, refer to 

SEC-39, "Wiring Diagram"

.

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.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2556

ENG START 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

M25

8

Ground

12

Push-button ignition switch

BCM

Continuity

Connector

Terminal

Connector

Terminal

M25

8

M83

55

Yes

Push-button ignition switch

Ground

Continuity

Connector

Terminal

M25

8

No

SEC-78

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2556 PUSH-BUTTON IGNITION SWITCH

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

REPLACE BCM

1. Replace BCM. Refer to 

BCS-73, "Removal and Installation"

.

2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT.

>> 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-78, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace push-button ignition switch. Refer to 

SEC-136, "Removal and Installation"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> Inspection End.

Component Inspection

INFOID:0000000009756722

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-136, "Removal and Installation"

.

Push-button ignition switch

Ground

Continuity

Connector

Terminal

M25

4

Yes

Push-button ignition switch

Condition

Continuity

Terminal

4

8

Push-button ignition 
switch

Pressed

Yes

Not pressed

No

B2557 VEHICLE SPEED

SEC-79

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

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A

B

SEC

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B2557 VEHICLE SPEED

DTC Logic

INFOID:0000000009756723

DTC DETECTION LOGIC

NOTE:

• If DTC B2557 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-63, "DTC Logic"

.

• If DTC B2557 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

BCS-64, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and wait 10 seconds or more.

2. Drive the vehicle at a vehicle speed of 10 km/h (6.2 MPH) or more for 10 seconds or more.

3. Check DTC in Self Diagnostic Result mode of BCM using CONSULT.
Is DTC detected?

YES

>> Go to 

SEC-79, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009756724

1.

CHECK DTC OF “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”

Check DTC in Self Diagnostic Result mode of ABS using CONSULT.
Is DTC detected?

YES

>> Perform the trouble diagnosis related to the detected DTC. Refer to 

BRC-43, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK DTC OF COMBINATION METER

Check DTC in Self Diagnostic Result mode of METER/M&A using CONSULT.
Is DTC detected?

YES

>> Perform the trouble diagnosis related to the detected DTC. Refer to 

MWI-26, "DTC Index"

.

NO

>> GO TO 3.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> Inspection End.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible causes

B2557

VEHICLE SPEED

BCM detects one of the following conditions for 10 
seconds continuously.
• Vehicle speed signal from “combination meter” 

is 10 km/h (6.2 MPH) or more and vehicle 
speed signal from “ABS actuator and electric 
unit (control unit)” is 4 km/h (2.5 MPH) or less

• Vehicle speed signal from “combination meter” 

is 4 km/h (2.5 MPH) or less and vehicle speed 
signal from “ABS actuator and electric unit 
(control unit)” is 10 km/h (6.2 MPH) or more

• Harness or connectors

(The CAN communication line is 
open or shorted.)

• Combination meter
• ABS actuator and electric unit 

(control unit)