Nissan Pathfinder. Manual - part 900

PCS-76

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B26F6 BCM

B26F6 BCM

DTC Logic

INFOID:0000000009175242

DTC DETECTION LOGIC

NOTE:

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

PCS-58, "DTC Logic"

.

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

PCS-59, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM SELF DIAGNOSTIC RESULT

1. Turn ignition switch ON under the following conditions, and wait for 2 seconds or more.

-

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

-

Do not depress brake pedal.

2. Perform self diagnostic result. 
Is DTC B26F6 detected?

YES

>> Go to 

PCS-76, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009175243

Regarding Wiring Diagram information, refer to 

PCS-44, "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 E119 and ground.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-32, "Removal and Installation"

.

NO

>> GO TO 3.

3.

 CHECK IGNITION RELAY-1 POWER SUPPLY (BCM)

Check voltage between BCM connector M19 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

E119

43

—

Ignition: OFF

0V

Ignition: ON

Battery voltage

BCM

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

PCS

B26F6 BCM

PCS-77

< 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

>> Refer to 

GI-49, "Intermittent Incident"

.

NO

>> Replace BCM. Refer to 

BCS-80, "Removal and Installation"

.

M19

70

—

Ignition: OFF

0V

Ignition: ON

Battery voltage

PCS-78

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

PUSH-BUTTON IGNITION SWITCH

PUSH-BUTTON IGNITION SWITCH

Component Function Check

INFOID:0000000009175244

1.

CHECK FUNCTION

1. Select “PUSH SW” in “Data Monitor” of BCM with CONSULT. 

2. Check the push-button ignition switch signal under the following conditions.

Is the indication normal?

YES

>> Inspection End.

NO

>> Go to  

PCS-78, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009175245

Regarding Wiring Diagram information, refer to 

PCS-44, "Wiring Diagram"

.

1.

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

1. Turn ignition switch OFF.

2. Disconnect push-button ignition switch connector and IPDM E/R connector E119.

3. Check voltage between push-button ignition switch connector M17 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

 CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (BCM)

1. Disconnect BCM connector M18.

2. Check continuity between BCM connector M18 and push-button ignition switch connector M17.

3. Check continuity between BCM connector M18 and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-80, "Removal and Installation"

.

NO

>> Repair or replace harness or connectors.

3.

 CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R)

Check voltage between IPDM E/R connector E119 and ground.

Test item

Condition

Status

PUSH SW

Push-button ignition switch is pressed

On

Push-button ignition switch is not pressed

Off

Push-button ignition switch

Ground

Voltage

(Approx.)

Connector

Terminal

M17

8

—

Battery voltage

BCM

Push-button ignition switch

Continuity

Connector

Terminal

Connector

Terminal

M18

1

M17

8

Yes

BCM

Ground

Continuity

Connector

Terminal

M18

1

—

No

PCS

PUSH-BUTTON IGNITION SWITCH

PCS-79

< 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 5.

NO

>> GO TO 4.

4.

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

1. Disconnect BCM connector M18.

2. Check continuity between IPDM E/R connector E119 and push-button ignition switch connector M17.

3. Check continuity between IPDM E/R connector E119 and ground.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-32, "Removal and Installation"

.

NO

>> Repair or replace harness or connectors.

5.

CHECK PUSH-BUTTON IGNITION SWITCH GROUND CIRCUIT 

Check continuity between push-button ignition switch connector M17 and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness or connectors.

6.

CHECK PUSH-BUTTON IGNITION SWITCH

Refer to 

PCS-79, "Component Inspection"

.

Is the inspection result normal?

YES

>> Refer to 

GI-49, "Intermittent Incident"

.

NO

>> Replace push-button ignition switch.

Component Inspection

INFOID:0000000009175246

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.

IPDM E/R

Ground

Voltage

(Approx.)

Connector

Terminal

E119

38

—

Battery voltage

IPDM E/R

Push-button ignition switch

Continuity

Connector

Terminal

Connector

Terminal

E119

38

M17

8

Yes

IPDM E/R

Ground

Continuity

Connector

Terminal

E119

38

—

No

Push-button ignition switch

Ground

Continuity

Connector

Terminal

M17

4

—

Yes

Push-button ignition switch terminals

Condition

Continuity

4 – 8

Pressed

Yes

Not pressed

No