Nissan Sentra. Manual - part 684

PCS

B2618 BCM

PCS-89

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK VOLTAGE OF IGNITION RELAY-1 CONTROL SIGNAL CIRCUIT (IPDM E/R SIDE) 

1. Connect IPDM E/R connector.

2. Check voltage between IPDM E/R connector E39 and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-73, "Removal and Installation"

.

NO

>> Replace IPDM E/R.

BCM

Ground

Continuity

Connector

Terminal

M83

73

No

(+)

(–)

Condition

Voltage (V)

(Approx.)

IPDM E/R

Connector

Terminal

E39

68

Ground

Ignition switch

OFF

Battery voltage

PCS-90

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B261A PUSH-BUTTON IGNITION SWITCH

B261A PUSH-BUTTON IGNITION SWITCH

DTC Logic

INFOID:0000000009755879

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

 PERFORM SELF DIAGNOSTIC RESULT

1. Press the push-button ignition switch under the following conditions, and wait for at least 1 second.

-

CVT selector lever is in the P (park) or N (neutral) position.

-

Release the brake pedal.

2. Perform self diagnostic result. 
Is DTC B261A detected?

YES

>> Refer to 

PCS-90, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009755880

Regarding Wiring Diagram information, refer to 

PCS-70, "Wiring Diagram"

.

1.

 CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL (PUSH-BUTTON IGNITION SWITCH)

1. Disconnect push-button ignition switch connector.

2. Check voltage between push-button ignition switch connector M25 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

 CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R)

Check voltage between IPDM E/R connector E39 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace IPDM E/R. Refer to 

PCS-30, "Removal and Installation"

.

3.

 CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (IPDM E/R)

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R connector E39 and BCM connector M83.

3. Check continuity between IPDM E/R connector E39 and push-button ignition switch connector M25.

CONSULT Display

DTC Detection Condition

Possible Cause

PUSH-BUTTON IGNITION 
SWITCH
[B261A]

 BCM detects a difference of signal for 1 second or 
more between the following information: 
• Power supply position by push-button ignition 

switch.

• Power supply position from IPDM E/R (CAN).

• Harness or connectors
• Push-button ignition switch
• BCM

Push-button ignition switch

Ground

Voltage

(Approx.)

Connector

Terminal

M25

8

—

Battery voltage

IPDM E/R

Ground

Voltage

(Approx.)

Connector

Terminal

E39

66

—

Battery voltage

PCS

B261A PUSH-BUTTON IGNITION SWITCH

PCS-91

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

4. Check continuity between IPDM E/R connector E39 and ground.

Is the inspection result normal?

YES

>> Refer to 

GI-39, "Intermittent Incident"

.

NO

>> Repair or replace harness or connectors.

4.

 CHECK IGNITION SWITCH OUTPUT SIGNAL (BCM)

Check voltage between BCM connector M83 and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace BCM. Refer to 

BCS-73, "Removal and Installation"

.

5.

 CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (BCM)

1. Turn ignition switch OFF.

2. Disconnect BCM connector M83 and IPDM E/R connector E39.

3. Check continuity between BCM connector M83 and push-button ignition switch connector M25.

4. Check continuity between BCM connector M83 and ground.

Is the inspection result normal?

YES

>> Refer to 

GI-39, "Intermittent Incident"

.

NO

>> Repair or replace harness or connectors.

IPDM E/R

Push-button ignition switch

Continuity

Connector

Terminal

Connector

Terminal

E39

66

M25

8

Yes

IPDM E/R

Ground

Continuity

Connector

Terminal

E39

66

—

No

BCM

Ground

Voltage

(Approx.)

Connector

Terminal

M83

55

—

Battery voltage

BCM

Push-button ignition switch

Continuity

Connector

Terminal

Connector

Terminal

M83

55

M25

8

Yes

BCM

Ground

Continuity

Connector

Terminal

M83

55

—

No

PCS-92

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B26F1 IGNITION RELAY

B26F1 IGNITION RELAY

DTC Logic

INFOID:0000000009755881

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON, and wait for 2 seconds or more.

2. Check “Self-diagnosis result” with CONSULT. 
Is DTC detected?

YES

>> Go to 

PCS-92, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009755882

Regarding Wiring Diagram information, refer to 

PCS-70, "Wiring Diagram"

.

1.

CHECK IPDM E/R SELF-DIAGNOSTIC RESULT

1. Turn ignition switch ON.

2. Erase the DTC of IPDM E/R.

3. Turn ignition switch OFF.

4. Turn ignition switch ON and check the DTC again.
Is DTC detected?

YES

>> Repair or replace the malfunctioning part. Refer to 

PCS-20, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK IGNITION RELAY-1 CONTROL SIGNAL (IPDM E/R)

Check voltage between BCM connector M83 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace BCM. Refer to 

BCS-73, "Removal and Installation"

.

3.

CHECK IGNITION RELAY-1 CONTROL SIGNAL CIRCUIT (IPDM E/R)

1. Turn ignition switch OFF.

2. Disconnect BCM connector M83 and IPDM E/R connector M39.

3. Check continuity between BCM connector M83 and IPDM E/R connector E39.

Is the inspection result normal?

CONSULT Display

DTC detecting condition

Possible cause

IGN RELAY OFF
[B26F1]

BCM transmits the ignition relay control signal, but 
does not receive ignition switch ON signal (CAN) 
from IPDM E/R.

• Harness or connectors
• BCM
• IPDM E/R

(+)

(–)

Condition

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M83

73

Ground

Ignition switch

ON

0

BCM

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

M83

73

E39

68

Yes