Nissan Sentra. Manual - part 770

SEC-108

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B26F3 STARTER CONTROL RELAY

B26F3 STARTER CONTROL RELAY

DTC Logic

INFOID:0000000009756754

DTC DETECTION LOGIC

NOTE:

• If DTC B26F3 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-63, "DTC Logic"

.

• If DTC B26F3 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. Press push-button ignition switch under the following conditions to start engine.

CVT models

-

Selector lever: In the Park (P) position

-

Brake pedal: Not depressed

M/T models

-

Shift lever: in the neutral position

-

Clutch pedal: Not depressed

2. Wait 2 seconds after engine started.

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

YES

>> Go to 

SEC-108, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009756755

1.

CHECK DTC OF IPDM E/R

Check DTC in Self Diagnostic Result mode of IPDM E/R using CONSULT.
Is DTC detected?

YES

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

PCS-20, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> Inspection End.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B26F3

START CONT RLY ON

BCM requests IPDM E/R to turn starter 
control relay OFF, but BCM cannot receive 
starter control relay OFF state signal from 
IPDM E/R (CAN).

• Harness or connectors

(The CAN communication line is open 
or shorted.)

• IPDM E/R

B26F4 STARTER CONTROL RELAY

SEC-109

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

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J

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M

A

B

SEC

N

O

P

B26F4 STARTER CONTROL RELAY

DTC Logic

INFOID:0000000009756756

DTC DETECTION LOGIC

NOTE:

• If DTC B26F4 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-63, "DTC Logic"

.

• If DTC B26F4 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. Press push-button ignition switch under the following conditions to start engine, and wait 1 second or

more.

CVT models

-

Selector lever: In the Park (P) position

-

Brake pedal: Not depressed

M/T models

-

Shift lever: in the neutral position

-

Clutch pedal: Not depressed

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

YES

>> Go to 

SEC-109, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009756757

1.

CHECK DTC OF IPDM E/R

Check DTC in Self Diagnostic Result mode of IPDM E/R using CONSULT.
Is DTC detected?

YES

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

PCS-20, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> Inspection End.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B26F4

START CONT RLY OFF

BCM requests IPDM E/R to turn starter 
control relay ON, but BCM cannot receive 
starter control relay ON state signal from 
IPDM E/R (CAN).

• Harness or connectors

(The CAN communication line is open 
or shorted.)

• IPDM E/R

SEC-110

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B26F7 BCM

B26F7 BCM

DTC Logic

INFOID:0000000009756758

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Press door request switch.

2. Turn ignition switch ON.

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

YES

>> Go to 

SEC-110, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009756759

1.

INSPECTION START

1. Turn ignition switch ON.

2. Select Self Diagnostic Result mode of BCM using CONSULT.

3. Touch ERASE.

4. Perform DTC CONFIRMATION PROCEDURE for DTC B26F7. Refer to 

SEC-110, "DTC Logic"

.

Is DTC B26F7 detected again?

YES

>> GO TO 2.

NO

>> Inspection End.

2.

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.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B26F7

BCM

Inside key antenna output circuit in BCM is malfunctioning. BCM

B26F8 BCM

SEC-111

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B26F8 BCM

DTC Logic

INFOID:0000000009756760

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait 1 second.

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

YES

>> Go to 

SEC-111, "Diagnosis Procedure"

.

NO

>> Inspection End

Diagnosis Procedure

INFOID:0000000009756761

1.

INSPECTION START

1. Turn ignition switch ON.

2. Select Self Diagnostic Result mode of BCM using CONSULT.

3. Touch ERASE.

4. Perform DTC CONFIRMATION PROCEDURE for DTC B26F8.

Refer to 

SEC-111, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 2.

NO

>> Inspection End

2.

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

DTC No.

CONSULT screen items

(Trouble diagnosis content)

DTC detecting condition

Possible cause

B26F8

BCM
(Body control module)

Starter control replay control signal and feedback circuit 
signal (inside BCM) does not match.

BCM