Nissan Leaf. Manual - part 393

DIAGNOSIS AND REPAIR WORK FLOW

DLK-67

< BASIC INSPECTION >

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DLK

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Inspect according to Diagnostic Procedure of the system.
Is malfunctioning part detected?

YES

>> GO TO 8.

NO

>> Check according to 

GI-53, "Intermittent Incident"

.

8.

REPAIR OR REPLACE THE MALFUNCTIONING PART

1. Repair or replace the malfunctioning part.

2. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-

ment.

3. Check DTC. If DTC is detected, erase it.

>> GO TO 9.

9.

FINAL CHECK

When DTC is detected in step 2, perform DTC CONFIRMATION PROCEDURE again, and then check that the

malfunction is repaired securely.

When symptom is described by the customer, refer to confirmed symptom in step 3 or 4, and check that the

symptom is not detected.
Is DTC detected and does symptom remain?

YES-1 >> DTC is detected: GO TO 7.

YES-2 >> Symptom remains: GO TO 4.

NO

>> Before returning the vehicle to the customer, always erase DTC.

DLK-68

< DTC/CIRCUIT DIAGNOSIS >

B2621 INSIDE ANTENNA

DTC/CIRCUIT DIAGNOSIS

B2621 INSIDE ANTENNA

DTC Logic

INFOID:0000000010119741

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”.

3. Perform inside key antenna (“INSIDE ANT DIAGNOSIS”) in “Work support” of “INTELLIGENT KEY”.

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

YES

>> Refer to 

DLK-68, "Diagnosis Procedure"

.

NO

>> Inside key antenna (instrument center) is OK.

Diagnosis Procedure

INFOID:0000000010119742

Regarding Wiring Diagram information, refer to 

DLK-44, "Wiring Diagram"

.

1.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1

1. Turn power switch ON.

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

Is the inspection result normal?

DTC

CONSULT display 

description

DTC detecting condition

Possible cause

B2621

INSIDE ANTENNA 1

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

• Inside key antenna (instrument 

center)

• Harness or connector

[Inside key antenna (instrument 
center) circuit is open or shorted]

(+)

(–)

Condition

Signal

(Reference value)

BCM

Connector

Terminal

M23

84
85

Ground

When Intelligent Key is in the 
antenna detection area

When Intelligent Key is not in 
the antenna detection area

JMKIA3839GB

JMKIA5951GB

B2621 INSIDE ANTENNA

DLK-69

< DTC/CIRCUIT DIAGNOSIS >

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YES

>> Replace BCM. Refer to 

BCS-72, "Removal and Installation"

.

NO

>> GO TO 2.

2.

CHECK INSIDE KEY ANTENNA CIRCUIT

1. Turn power switch OFF.

2. Disconnect BCM connector and inside key antenna (instrument center) connector.

3. Check continuity between BCM harness connector and inside key antenna (instrument center) 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 (instrument center). (New antenna or other antenna)

2. Connect BCM connector and inside key antenna (instrument center) connector.

3. Turn power switch ON.

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

Is the inspection result normal?

YES

>> Replace inside key antenna (instrument center). Refer to 

DLK-205, "INSTRUMENT CENTER :

Removal and Installation"

.

NO

>> Replace BCM. Refer to 

BCS-72, "Removal and Installation"

.

BCM

Inside key antenna (instrument center)

Continuity 

Connector

Terminal

Connector

Terminal

M23

84

M86

1

Yes

85

2

BCM

Ground

Continuity 

Connector

Terminal

M23

84

No

85

(+)

(–)

Condition

Signal

(Reference value)

BCM

Connector

Terminal

M23

84
85

Ground

When Intelligent Key is in the 
antenna detection area

When Intelligent Key is not in 
the antenna detection area

JMKIA3839GB

JMKIA5951GB

DLK-70

< DTC/CIRCUIT DIAGNOSIS >

B2622 INSIDE ANTENNA

B2622 INSIDE ANTENNA

DTC Logic

INFOID:0000000010119743

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”.

3. Perform inside key antenna (“INSIDE ANT DIAGNOSIS”) in “Work support” of “INTELLIGENT KEY”.

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

YES

>> Refer to 

DLK-70, "Diagnosis Procedure"

.

NO

>> Inside key antenna (rear seat) is OK.

Diagnosis Procedure

INFOID:0000000010119744

Regarding Wiring Diagram information, refer to 

DLK-44, "Wiring Diagram"

.

1.

CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1

1. Turn power switch ON.

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

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-72, "Removal and Installation"

.

NO

>> GO TO 2.

DTC

CONSULT display 

description

DTC detecting condition

Possible cause

B2622

INSIDE ANTENNA 2

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

• Inside key antenna (rear seat)
• Harness or connector

[Inside key antenna (rear seat) cir-
cuit is open or shorted]

(+)

(–)

Condition

Signal

(Reference value)

BCM

Connector

Terminal

M23

86
87

Ground

When Intelligent Key is in the an-
tenna detection area

When Intelligent Key is not in the 
antenna detection area

JMKIA3839GB

JMKIA5951GB