Nissan Maxima. Manual - part 336

B2623 INSIDE KEY ANTENNA 3

DLK-63

< DTC/CIRCUIT DIAGNOSIS >

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B2623 INSIDE KEY ANTENNA 3

Description

INFOID:0000000009471631

Detects whether Intelligent Key is inside the vehicle.

Installed in the trunk room.

DTC Logic

INFOID:0000000009471632

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

 With CONSULT

1. Perform rear parcel shelf antenna INSIDE ANT DIAGNOSIS on “Work Support” of “INTELLIGENT KEY”.

2. Perform “INTELLIGENT KEY” Self Diagnostic Result.
Is rear parcel shelf antenna DTC detected?

YES

>> Refer to 

DLK-63, "Diagnosis Procedure"

.

NO

>> Rear parcel shelf antenna is OK.

Diagnosis Procedure

INFOID:0000000009471633

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-161, "Wiring Diagram"

.

1.

CHECK REAR PARCEL SHELF ANTENNA INPUT SIGNAL 1

1. Turn ignition switch OFF.

2. Check signal between BCM connector and ground with oscillo-

scope.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2623

INSIDE ANTENNA 3 
CIRCUIT

An excessive high or low voltage from rear parcel 
shelf antenna is sent to BCM.

• Rear parcel shelf antenna
• Between BCM and rear parcel 

shelf antenna

ALKIA0329ZZ

DLK-64

< DTC/CIRCUIT DIAGNOSIS >

B2623 INSIDE KEY ANTENNA 3

Is the inspection result normal?

YES

>> Check the condition of harness and connector.

NO

>> GO TO 2

2.

CHECK REAR PARCEL SHELF ANTENNA CIRCUIT

1. Disconnect BCM and rear parcel shelf antenna connector.

2. Check continuity between BCM connector and rear parcel shelf antenna connector.

3. Check continuity between BCM connector and ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair or replace harness between BCM and rear parcel shelf antenna.

3.

CHECK REAR PARCEL SHELF ANTENNA INPUT SIGNAL 2

1. Replace rear parcel shelf antenna (new antenna or other antenna).

2. Connect BCM and rear parcel shelf antenna connector.

Terminals

Condition

Signal

(Reference value.)

(+)

(–)

BCM connector

Terminal

M21

Rear parcel 

shelf antenna

115

Ground

Place Intelligent Key inside the 
vehicle.

Place Intelligent Key outside 
the vehicle.

JMKIA0062GB

JMKIA0063GB

BCM connector

Terminal

Rear parcel shelf antenna 

connector

Terminal

Continuity 

M21

114

B29

Trunk room

2

Yes

115

1

BCM connector

Terminal

Ground

Continuity 

M21

Trunk room

114

No

115

B2623 INSIDE KEY ANTENNA 3

DLK-65

< DTC/CIRCUIT DIAGNOSIS >

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3. Check signal between BCM connector and ground with oscillo-

scope.

Is the inspection result normal?

YES

>> Replace rear parcel shelf antenna. Refer to 

INT-28, "Removal and Installation"

.

NO

>> Replace BCM. Refer to 

BCS-79, "Removal and Installation"

.

ALKIA0329ZZ

Terminals

Condition

Signal

(Reference value.)

(+)

(–)

BCM connector

Terminal

M21

Trunk room

115

Ground

Place Intelligent Key inside 
the vehicle.

Place Intelligent Key outside 
the vehicle. 

JMKIA0062GB

JMKIA0063GB

DLK-66

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000010056660

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.

Special Repair Requirement

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1.

 REQUIRED WORK WHEN REPLACING BCM

Initialize control unit. Refer to 

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

Work Procedure"

.

>> Work End.

Terminal No.

Signal name

Fuse and fusible link No.

1

Battery power supply

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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