Nissan Quest E52. Manual - part 942

PCS

B261A PUSH-BUTTON IGNITION SWITCH

PCS-65

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

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L

B

A

O

P

N

B261A PUSH-BUTTON IGNITION SWITCH

DTC Logic

INFOID:0000000009652890

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Press push-button ignition switch (push switch) under the following conditions, and wait for 1 second or
more.

-

Shift position is in the P position

-

Do not depress brake pedal

2.

Check “Self-diagnosis result” of BCM with CONSULT. 

Is DTC detected?

YES

>> Go to 

PCS-65, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009652891

1.

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

1.

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

2.

Check voltage between push-button ignition switch harness connector 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.

2.

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

3.

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

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-98, "Removal and Installation"

.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B261A

PUSH-BTN IGN SW

The following signal status that BCM receives are 
compared, and it does not agree for 1 second or 
more.
• Push-button Ignition switch (push switch) signal
• Push-button Ignition switch (push switch) status 

signal (CAN)

• Harness or connectors

[Push-button Ignition switch (push 
switch) circuit]

• BCM
• IPDM  E/R

(+)

(–)

Voltage (V)

(Approx.)

Push-button Ignition switch

Connector

Terminal

M101

4

Ground

9 - 16

BCM

Push-button Ignition switch

Continuity

Connector

Terminal

Connector

Terminal

M124

76

M101

4

Existed

Push-button Ignition switch

Ground

Continuity

Connector

Terminal

M101

4

Not existed

PCS-66

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B261A PUSH-BUTTON IGNITION SWITCH

NO

>> Repair or replace harness.

3.

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

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

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> GO TO 4.

4.

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

1.

Disconnect BCM connector.

2.

Check continuity between IPDM E/R harness connector and push-button ignition switch harness connec-
tor.

3.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

(+)

(–)

Voltage (V)

(Approx.)

IPDM E/R

Connector

Terminal

E10

28

Ground

9 - 16

IPDM E/R

Push-button Ignition switch

Continuity

Connector

Terminal

Connector

Terminal

E10

28

M101

4

Existed

Push-button Ignition switch

Ground

Continuity

Connector

Terminal

M101

4

Not existed

PCS

B26F1 IGNITION RELAY

PCS-67

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

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J

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L

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A

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P

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B26F1 IGNITION RELAY

DTC Logic

INFOID:0000000009652892

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-67, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009652893

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-24, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK IGNITION RELAY (IPDM E/R) CONTROL SIGNAL

Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace BCM. Refer to 

BCS-98, "Removal and Installation"

.

3.

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

1.

Turn ignition switch OFF.

2.

Disconnect BCM and IPDM connectors.

3.

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

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Repair or replace harness.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B26F1

IGN RELAY OFF

BCM transmits the ignition relay control signal 
(ON: 0 V) or ignition switch ON signal (ON) 
(CAN), but does not receives ignition switch 
ON signal (ON) (CAN) from IPDM E/R.

• Harness or connectors

(Ignition relay circuit is open)

• BCM
• IPDM E/R

(+)

(–)

Condition

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M124

98

Ground

Ignition switch

ON

0 - 0.5

BCM

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

M124

98

E10

27

Existed

PCS-68

< DTC/CIRCUIT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B26F2 IGNITION RELAY

B26F2 IGNITION RELAY

DTC Logic

INFOID:0000000009652894

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-68, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009652895

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-24, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK IGNITION RELAY (IPDM E/R) CONTROL SIGNAL

1.

Turn ignition switch OFF.

2.

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

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> GO TO 3.

3.

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

1.

Turn ignition switch OFF.

2.

Disconnect BCM and IPDM E/R connectors.

3.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B26F2

IGN RELAY ON

BCM transmits the ignition relay control signal 
(OFF: 12 V) or ignition switch ON signal (OFF) 
(CAN), but does not receives ignition switch 
ON signal (OFF) (CAN) from IPDM E/R.

• Harness or connectors

(Ignition relay circuit is short)

• BCM
• IPDM E/R

(+)

(–)

Condition

Voltage (V)

(Approx.)

IPDM E/R

Connector

Terminal

E10

27

Ground

Ignition switch

OFF or ACC

6 - 16

IPDM E/R

Ground

Continuity

Connector

Terminal

E10

27

Not existed