Infiniti G37 Coupe. Manual - part 375

B2622 INSIDE KEY ANTENNA 2

DLK-61

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

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B2622 INSIDE KEY ANTENNA 2

Description

INFOID:0000000001683052

Detects whether Intelligent Key is inside the vehicle.
Installed in the center console.

DTC Logic

INFOID:0000000001683053

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-III

1.

Perform inside key antenna (“INSIDE ANT DIAGNOSIS”) on “Work Support” of “INTELLIGENT KEY”.

2.

Perform “INTELLIGENT KEY” Self Diagnostic Result.

Is inside key antenna DTC detected?

YES

>> Refer to 

DLK-61, "Diagnosis Procedure"

.

NO

>> Inside key antenna (console) is OK.

Diagnosis Procedure

INFOID:0000000001683054

1.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1

1.

Turn ignition switch OFF.

2.

Check signal between BCM harness connector and ground with oscilloscope.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

NO

>> GO TO 2.

2.

CHECK INSIDE KEY ANTENNA CIRCUIT

1.

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

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2622

INSIDE ANTENNA 2 
CIRCUIT

An excessive high or low voltage from inside anten-
na is sent to BCM.

• Inside key antenna (console)
• Between BCM and Inside key an-

tenna (console)

Terminals

Condition

Signal

(Reference value)

(+)

(–)

BCM connector

Terminal

M122

73

Ground

When Intelligent Key is in the pas-
senger compartment.

When Intelligent Key is not in the 
passenger compartment. 

JMKIA0062GB

JMKIA0063GB

DLK-62

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2622 INSIDE KEY ANTENNA 2

2.

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

3.

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness between BCM and inside key antenna (console).

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.

Check signal between BCM harness connector and ground with oscilloscope.

Is the inspection result normal?

YES

>> Replace inside key antenna (console). Refer to 

DLK-239, "CONSOLE : Removal and Installation"

.

NO

>> Replace BCM. Refer to 

BCS-79, "Removal and Installation"

.

BCM connector

Terminal

Inside key antenna 

(console) connector

Terminal

Continuity 

M122

72

M146

2

Existed

73

1

BCM connector

Terminal

Ground

Continuity 

M122

72

Not existed

73

Terminals

Condition

Signal

(Reference value)

(+)

(–)

BCM connector

Terminal

M122

73

Ground

When Intelligent Key is in the pas-
senger compartment.

When Intelligent Key is not in the 
passenger compartment. 

JMKIA0062GB

JMKIA0063GB

B2623 INSIDE KEY ANTENNA 3

DLK-63

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

B2623 INSIDE KEY ANTENNA 3

Description

INFOID:0000000001683055

Detects whether Intelligent Key is inside the vehicle.
Installed in the trunk room.

DTC Logic

INFOID:0000000001683056

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-III

1.

Perform inside key antenna (“INSIDE ANT DIAGNOSIS”) on “Work Support” of “INTELLIGENT KEY”.

2.

Perform “INTELLIGENT KEY” Self Diagnostic Result.

Is inside key antenna DTC detected?

YES

>> Refer to 

DLK-63, "Diagnosis Procedure"

.

NO

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

Diagnosis Procedure

INFOID:0000000001683057

1.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1

1.

Turn ignition switch OFF.

2.

Check signal between BCM harness connector and ground with oscilloscope.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

NO

>> GO TO 2.

2.

CHECK INSIDE KEY ANTENNA CIRCUIT

1.

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

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2623

INSIDE ANTENNA 3 
CIRCUIT

An excessive high or low voltage from inside anten-
na is sent to BCM.

• Inside key antenna (trunk room)
• Between BCM and Inside key an-

tenna (trunk room)

Terminals

Condition

Signal

(Reference value)

(+)

(–)

BCM connector

Terminal

M121

35

Ground

When Intelligent Key is in the 
passenger compartment.

When Intelligent Key is not in the 
passenger compartment. 

JMKIA0062GB

JMKIA0063GB

DLK-64

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2623 INSIDE KEY ANTENNA 3

2.

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

3.

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness between BCM and inside key antenna (trunk room).

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.

Check signal between BCM harness connector and ground with oscilloscope.

Is the inspection result normal?

YES

>> Replace inside key antenna (trunk room). Refer to 

DLK-240, "TRUNK ROOM : Removal and

Installation"

.

NO

>> Replace BCM. Refer to 

BCS-79, "Removal and Installation"

.

BCM connector

Terminal

Inside key antenna

 (trunk room) connector

Terminal

Continuity 

M121

34

B49

2

Existed

35

1

BCM connector

Terminal

Ground

Continuity 

M121

34

Not existed

35

Terminals

Condition

Signal

(Reference value)

(+)

(–)

BCM connector

Terminal

M121

35

Ground

When Intelligent Key is in the 
passenger compartment.

When Intelligent Key is not in 
the passenger compartment. 

JMKIA0062GB

JMKIA0063GB