Nissan Sentra. Manual — part 240

DLK-76

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2622 INSIDE ANTENNA

Is the inspection result normal?

YES

>> Replace BCM. Refer to

BCS-73, "Removal and Installation"

.

NO

>> GO TO 2.

2.

CHECK INSIDE KEY ANTENNA CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM connector and inside key antenna (console) connector.

3. Check continuity between BCM harness connector and inside key antenna (console) harness connector.

4. Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL 2

1. Replace inside key antenna (console). (New antenna or other antenna)

2. Connect BCM connector and inside key antenna (console) connector.

3. Turn ignition switch ON.

4. Check signal between BCM harness connector and ground using oscilloscope.

(+)

(–)

Condition

Signal

(Reference value)

BCM

Connector

Terminal

M83

45
44

Ground

When Intelligent Key is in the anten-
na detection area

When Intelligent Key is not in the an-
tenna detection area

JMKIA3839GB

JMKIA5951GB

BCM

Inside key antenna (console)

Continuity

Connector

Terminal

Connector

Terminal

M83

45

M89

1

Yes

44

2

BCM

Ground

Continuity

Connector

Terminal

M83

45

No

44

B2622 INSIDE ANTENNA

DLK-77

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

Is the inspection result normal?

YES

>> Replace inside key antenna (console).

NO

>> Replace BCM. Refer to

BCS-73, "Removal and Installation"

.

(+)

(–)

Condition

Signal

(Reference value)

BCM

Connector

Terminal

M83

45
44

Ground

When Intelligent Key is in the anten-
na detection area

When Intelligent Key is not in the an-
tenna detection area

JMKIA3839GB

JMKIA5951GB

DLK-78

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2623 INSIDE ANTENNA

B2623 INSIDE ANTENNA

DTC Logic

INFOID:0000000009756377

NOTE:

The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II

User Guide for additional information.

• Check Intelligent Key relative signal strength

• Confirm vehicle Intelligent Key antenna signal strength

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Select INTELLIGENT KEY of BCM using CONSULT.

2. Select INSIDE ANT DIAGNOSIS in WORK SUPPORT mode.

3. Perform inside key antenna (INSIDE ANT DIAGNOSIS) on WORK SUPPORT of INTELLIGENT KEY.

4. Check BCM for DTC.
Is inside key antenna DTC detected?

YES

>> Refer to

DLK-78, "Diagnosis Procedure"

.

NO

>> Inside key antenna (trunk room) is OK.

Diagnosis Procedure

INFOID:0000000009756378

NOTE:

The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II

User Guide for additional information.

• Check Intelligent Key relative signal strength

• Confirm vehicle Intelligent Key antenna signal strength

Regarding Wiring Diagram information, refer to

DLK-49, "Wiring Diagram"

.

1.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1

1. Turn ignition switch ON.

2. Check signal between BCM harness connector and ground using oscilloscope.

DTC

CONSULT display

description

DTC detecting condition

Possible cause

B2623

INSIDE ANTENNA 3

An excessive high or low voltage from inside anten-
na (trunk room) is sent to BCM

• Inside key antenna (trunk room)
• Harness between BCM and inside

key antenna (trunk room)

• BCM

B2623 INSIDE ANTENNA

DLK-79

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

Is the inspection result normal?

YES

>> Replace BCM. Refer to

BCS-73, "Removal and Installation"

.

NO

>> GO TO 2.

2.

CHECK INSIDE KEY ANTENNA CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM connector and inside key antenna (trunk room) connector.

3. Check continuity between BCM harness connector and inside key antenna (trunk room) harness connec-

tor.

4. Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL 2

1. Replace inside key antenna (trunk room). (New antenna or other antenna)

2. Connect BCM connector and inside key antenna (trunk room) connector.

3. Turn ignition switch ON.

4. Check signal between BCM harness connector and ground using oscilloscope.

(+)

(–)

Condition

Signal

(Reference value)

BCM

Connector

Terminal

M83

43
42

Ground

When Intelligent Key is in the anten-
na detection area

When Intelligent Key is not in the an-
tenna detection area

JMKIA3839GB

JMKIA5951GB

BCM

Inside key antenna (trunk room)

Continuity

Connector

Terminal

Connector

Terminal

M83

43

B49

1

Yes

42

2

BCM

Ground

Continuity

Connector

Terminal

M83

43

No

42