Nissan Sentra. Manual - part 685

PCS

B26F1 IGNITION RELAY

PCS-93

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

YES

>> Replace IPDM E/R. Refer to 

PCS-30, "Removal and Installation"

.

NO

>> Repair or replace harness.

PCS-94

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B26F2 IGNITION RELAY

B26F2 IGNITION RELAY

DTC Logic

INFOID:0000000009755883

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-94, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009755884

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)

1. Turn ignition switch OFF.

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

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> GO TO 3.

3.

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

1. Turn ignition switch OFF.

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

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

Is the inspection result normal?

CONSULT Display

DTC detecting condition

Possible cause

IGN RELAY ON
[B26F2]

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.)

IPDM E/R

Connector

Terminal

E39

68

Ground

Ignition switch

OFF or ACC

Battery voltage

IPDM E/R

Ground

Continuity

Connector

Terminal

E39

68

No

PCS

B26F2 IGNITION RELAY

PCS-95

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

YES

>> GO TO 4.

NO

>> Repair or replace harness.

4.

CHECK IGNITION RELAY-1 CONTROL SIGNAL CIRCUIT - 2 (IPDM E/R)

1. Connect IPDM E/R connector E39.

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. Refer to 

PCS-30, "Removal and Installation"

.

(+)

(–)

Condition

Voltage (V)

(Approx.)

IPDM E/R

Connector

Terminal

E39

68

Ground

Ignition switch

OFF or ACC

Battery voltage

PCS-96

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B26F6 BCM

B26F6 BCM

DTC Logic

INFOID:0000000009755885

DTC DETECTION LOGIC

NOTE:

• If DTC B26F6 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

PCS-80, "DTC Logic"

.

• If DTC B26F6 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

PCS-81, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON, and wait for 0.5 seconds or more.

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

YES

>> Go to 

PCS-96, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009755886

Regarding Wiring Diagram information, refer to 

PCS-70, "Wiring Diagram"

.

1.

 CHECK SELF DIAGNOSTIC RESULT FOR IPDM E/R

Perform self diagnostic result for IPDM E/R.
Are any DTCs detected?

YES

>> Refer to 

PCS-20, "DTC Index"

. 

NO

>> GO TO 2

2.

 CHECK IGNITION RELAY-1 POWER SUPPLY (IPDM E/R)

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

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-30, "Removal and Installation"

.

NO

>> GO TO 3.

3.

 CHECK IGNITION RELAY-1 POWER SUPPLY (BCM)

Check voltage between BCM connector M83 and ground.

CONSULT Display

DTC Detection Condition

Possible Cause

BCM
[B26F6]

Ignition relay ON signal is not transmitted from IPDM 
E/R (CAN) when BCM turns ignition relay ON.

BCM

IPDM E/R

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

E39

68

—

Ignition: OFF

Battery voltage

Ignition: ON

0V

BCM

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

M83

73

—

Ignition: OFF

Battery voltage

Ignition: ON

0V