Nissan Maxima. Manual — part 895

PCS-60

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B261A PUSH-BUTTON IGNITION SWITCH

B261A PUSH-BUTTON IGNITION SWITCH

Description

INFOID:0000000010049444

IPDM E/R transmits the push-button ignition switch status via CAN communication to BCM. BCM receives

push-button ignition switch status by hardwire input. BCM compares the 2 signals for mismatch.

DTC Logic

INFOID:0000000010049445

DTC DETECTION LOGIC

NOTE:

• If DTC B261A is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

PCS-44, "DTC Logic"

.

• If DTC B261A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

PCS-45, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

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 position

-

Do not depress brake pedal.

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

YES

>> Refer to

PCS-60, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010049446

Regarding Wiring Diagram information, refer to

PCS-103, "Wiring Diagram"

.

1.

CHECK PUSH-BUTTON IGNITION SWITCH OPERATION

Press push-button ignition switch and check if it turns to ON.
Does ignition switch turn to ON?

YES

>> GO TO 2

NO

>> GO TO 4

2.

CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R)

DTC No.

Trouble diagnosis

name

DTC detecting condition

Possible cause

B261A

PUSH-BUTTON
IGNITION
SWITCH

BCM detects the mismatch between the following for 1
second or more
• Push-button ignition switch status
• Push-button ignition switch status from IPDM E/R (CAN)

• Harness or connectors

(Push-button ignition switch circuit is
open or shorted)

• Between BCM and push-button igni-

tion switch

• Between IPDM E/R and push-button

ignition switch

PCS

B261A PUSH-BUTTON IGNITION SWITCH

PCS-61

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

1. Turn ignition switch OFF.

2. Disconnect push-button ignition switch.

3. Check voltage between IPDM E/R harness connector and

ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Replace IPDM E/R. Refer to

PCS-35, "Removal and Installation"

.

3.

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

1. Disconnect IPDM E/R and BCM.

2. Check continuity between IPDM E/R harness connector (A) and

push-button ignition switch harness connector (B).

3. Check continuity between IPDM E/R harness connector and

ground.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> Repair or replace harness.

4.

CHECK IGNITION SWITCH OUTPUT SIGNAL (BCM)

1. Disconnect push-button ignition switch.

2. Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5

NO

>> Replace BCM. Refer to

BCS-79, "Removal and Installation"

.

5.

CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (BCM)

1. Disconnect BCM and IPDM E/R.

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

Terminals

Voltage (V)

(+)

(-)

IPDM E/R

Ground

Connector

Terminal

E18

28

Battery voltage

ALMIA0090ZZ

IPDM E/R

Push-button ignition switch

Continuity

Connector

Terminal

Connector

Terminal

E18 (A)

28

M38 (B)

4

Yes

ALMIA0091ZZ

IPDM E/R

Ground

Continuity

Connector

Terminal

E18

28

No

ALMIA0092ZZ

Terminals

Voltage (V)

(+)

(-)

BCM

Ground

Connector

Terminal

M21

140

Battery voltage

PCS-62

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B261A PUSH-BUTTON IGNITION SWITCH

3. Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> Repair or replace harness.

6.

CHECK INTERMITTENT INCIDENT

Refer to

GI-41, "Intermittent Incident"

.

>> Inspection End.

BCM

Push-button ignition switch

Continuity

Connector

Terminal

Connector

Terminal

M21

140

M38

4

Yes

BCM

Ground

Continuity

Connector

Terminal

M21

140

No

PCS

POWER SUPPLY AND GROUND CIRCUIT

PCS-63

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

POWER SUPPLY AND GROUND CIRCUIT

BCM
BCM : Diagnosis Procedure

INFOID:0000000010049506

Regarding Wiring Diagram information, refer to

BCS-67, "Wiring Diagram"

.

1.

CHECK FUSE AND FUSIBLE LINK

Check if the following BCM fuses or fusible link are blown.

Is the fuse or fusible link blown?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit.

NO

>> GO TO 2

2.

CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM.

3. Check voltage between BCM harness connector and ground.

Is the measurement normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair or replace harness.

BCM : Special Repair Requirement

INFOID:0000000010049507

1.

REQUIRED WORK WHEN REPLACING BCM

Initialize control unit. Refer to

BCS-5, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (BCM) :

Work Procedure"

.

Terminal No.

Signal name

Fuse and fusible link No.

1

Battery power supply

H

11

10

24

7

Terminals

Voltage

(Approx.)

(+)

(

−)

BCM

Ground

Connector

Terminal

M16

1

Battery voltage

M17

11

M18

24

BCM

Ground

Continuity

Connector

Terminal

M17

13

Yes