Nissan Leaf. Manual - part 1078

SEC-74

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2196 DONGLE UNIT

NO

>> Repair or replace harness.

3.

CHECK DONGLE UNIT GROUND CIRCUIT

Check continuity between dongle unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace dongle unit. Refer to 

SEC-117, "Removal and Installation"

.

NO

>> Repair or replace harness.

Dongle unit

Ground

Continuity

Connector

Terminal

M91

4

Yes

B2198 NATS ANTENNA AMP.

SEC-75

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B2198 NATS ANTENNA AMP.

DTC Logic

INFOID:0000000010119262

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Make the conditions that BCM enters in the low power consumption mode (BCM sleep condition), and

wait 15 to 60 minutes. Refer to 

BCS-12, "POWER CONSUMPTION CONTROL SYSTEM : System

Description"

.

2. Turn power switch ON.

3. Check DTC in “Self Diagnostic Result” of “BCM” using CONSULT.
Is DTC detected?

YES

>> Go to 

SEC-75, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010119263

Regarding Wiring Diagram information, refer to 

SEC-42, "Wiring Diagram"

.

1.

CHECK FUSE

1. Turn power switch OFF.

2. Check that the following fuse in the fuse, fusible link and relay block 2 is not blown.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the cause of blowing.

2.

CHECK NATS ANTENNA AMP. POWER SUPPLY

1. Disconnect NATS antenna amp. connector.

2. Check voltage between NATS antenna amp. harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK NATS ANTENNA AMP. POWER SUPPLY CIRCUIT

Check the following.

• 12V battery

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2198

IMMOBI ANT NG

Inactive communication between NATS 
antenna amp. and BCM is detected when 
BCM enters in the low power consumption 
mode (BCM sleep condition)

• Harness or connectors

(NATS antenna amp. circuit is open or 
shorted.)

• NATS antenna amp.
• BCM

Signal name

Fuse No.

Battery power supply

77

(+)

(–)

Voltage (V)

(Approx.)

NATS antenna amp.

Connector

Terminal

M49

1

Ground

Battery voltage 

SEC-76

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2198 NATS ANTENNA AMP.

• Harness for short or open between 12V battery and 20A fuse (No. 77)

• 20A fuse (No. 77)

• Harness for short or open between 20A fuse (No. 77) and NATS antenna amp.
Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK NATS ANTENNA AMP. GROUND CIRCUIT

Check continuity between NATS antenna amp. harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness.

5.

CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL 1

Check voltage signal between NATS antenna amp. harness connector and ground using an oscilloscope.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 6.

6.

CHECK NATS ANTENNA AMP. OUTPUT SIGNAL CIRCUIT 1

1. Disconnect BCM connector.

2. Check continuity between NATS antenna amp. harness connector and BCM connector.

3. Check continuity between NATS antenna amp. harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair or replace harness.

7.

CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL 2

Check voltage signal between NATS antenna amp. harness connector and ground using an oscilloscope.

NATS antenna amp.

Ground

Continuity

Connector

Terminal

M49

4

Yes

(+)

(–)

Condition

Voltage (V)

(Approx.)

NATS antenna amp.

Connector

Terminal

M49

2

Ground

Intelligent Key: Intelligent 
Key battery is removed

Brake pedal: Depressed
NOTE:
Waveform varies each time 
when brake pedal is depressed

Brake pedal: Released

Battery voltage 

JMKIA6232JP

NATS antenna amp.

BCM

Continuity

Connector

Terminal

Connector

Terminal

M49

2

M24

21

Yes

NATS antenna amp.

Ground

Continuity

Connector

Terminal

M49

2

No

B2198 NATS ANTENNA AMP.

SEC-77

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

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J

L

M

A

B

SEC

N

O

P

Is the inspection result normal?

YES

>> Replace NATS antenna amp. Refer to 

SEC-113, "Removal and Installation"

.

NO

>> GO TO 8.

8.

CHECK NATS ANTENNA AMP. OUTPUT SIGNAL CIRCUIT 2

1. Disconnect BCM connector.

2. Check continuity between NATS antenna amp. harness connector and BCM connector.

3. Check continuity between NATS antenna amp. harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair or replace harness.

9.

REPLACE BCM

1. Replace BCM. Refer to 

BCS-72, "Removal and Installation"

.

2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT. Refer to the CON-

SULT Immobilizer mode and follow the on screen instructions.

>> Inspection End.

(+)

(–)

Condition

Voltage (V)

(Approx.)

NATS antenna amp.

Connector

Terminal

M49

3

Ground

Intelligent Key: Intelligent 
Key battery is removed

Brake pedal: Depressed
NOTE:
Waveform varies each time 
when brake pedal is depressed

Brake pedal: Released

Battery voltage 

JMKIA6233JP

NATS antenna amp.

BCM

Continuity

Connector

Terminal

Connector

Terminal

M49

3

M24

25

Yes

NATS antenna amp.

Ground

Continuity

Connector

Terminal

M49

3

No