Nissan Leaf. Manual - part 1080

SEC-82

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2556 POWER SWITCH

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

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.

4.

CHECK POWER SWITCH GROUND CIRCUIT

Check continuity between power switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness.

5.

CHECK POWER SWITCH

Refer to 

SEC-82, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace power switch. Refer to 

SEC-114, "Removal and Installation"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-53, "Intermittent Incident"

.

>> Inspection End.

Component Inspection

INFOID:0000000010119269

1.

CHECK POWER SWITCH

1. Turn power switch OFF.

2. Disconnect power switch connector.

3. Check continuity between power switch terminals.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace power switch. Refer to 

SEC-114, "Removal and Installation"

.

Power switch

Ground

Continuity

Connector

Terminal

M33

4

Yes

Power switch

Condition

Continuity

Terminal

8

4

Power switch

Pressed

Yes

Not pressed

No

B2557 VEHICLE SPEED

SEC-83

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B2557 VEHICLE SPEED

DTC Logic

INFOID:0000000010119270

DTC DETECTION LOGIC

NOTE:

• If DTC B2557 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-61, "DTC Logic"

.

• If DTC B2557 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

BCS-62, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Set vehicle to READY and wait 10 seconds or more.

2. Drive vehicle at a vehicle speed of 10 km/h (6.2 MPH) or more for 10 seconds or more.

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

YES

>> Go to 

SEC-83, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010119271

1.

CHECK DTC OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

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

YES

>> Perform the trouble diagnosis related to the detected DTC. Refer to 

BRC-56, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK DTC OF COMBINATION METER

Check DTC in “Self Diagnostic Result” of “METER/M&A” using CONSULT.
Is DTC detected?

YES

>> Perform the trouble diagnosis related to the detected DTC. Refer to 

MWI-65, "DTC Index"

.

NO

>> GO TO 3.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-53, "Intermittent Incident"

.

>> Inspection End.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible causes

B2557

VEHICLE SPEED

BCM detects one of the following conditions for 10 
seconds continuously.
• Vehicle speed signal from combination meter is 10 

km/h (6.2 MPH) or more, and vehicle speed signal 
from ABS actuator and electric unit (control unit) is 
4 km/h (2.5 MPH) or less.

• Vehicle speed signal from combination meter is 4 

km/h (2.5 MPH) or less, and vehicle speed signal 
from ABS actuator and electric unit (control unit) is 
10 km/h (6.2 MPH) or more.

• Harness or connectors

(The CAN communication line is 
open or shorted.)

• Combination meter
• ABS actuator and electric unit 

(control unit)

SEC-84

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2601 SHIFT POSITION

B2601 SHIFT POSITION

DTC Logic

INFOID:0000000010119272

DTC DETECTION LOGIC

NOTE:

• If DTC B2601 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-61, "DTC Logic"

.

• If DTC B2601 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

BCS-61, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn power switch ON.

2. Operate electric shift selector to change shift position to P, and wait 2 seconds or more.

3. Operate electric shift selector to change shift position to any position other than P, and wait 2 seconds or

more.

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

YES

>> Go to 

SEC-84, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010119273

Regarding Wiring Diagram information, refer to 

SEC-42, "Wiring Diagram"

.

1.

CHECK P POSITION SIGNAL CIRCUIT 1

1. Turn power switch OFF.

2. Disconnect BCM connector.

3. Disconnect VCM connector.

4. Check continuity between BCM harness connector and VCM harness connector.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace harness.

2.

CHECK P POSITION SIGNAL CIRCUIT 2

1. Disconnect IPDM E/R connector.

2. Check continuity between IPDM E/R harness connector and VCM harness connector.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2601

SHIFT P SIGNAL

When there is a difference between P position 
signal from VCM and P position signal from 
IPDM E/R (CAN).

• Harness or connectors

(CAN communication line is open or 
shorted.)

• Harness or connectors

(VCM circuit is open or shorted.)

• IPDM E/R
• BCM

BCM

VCM

Continuity

Connector

Terminal

Connector

Terminal

M24

37

E61

48

Yes

B2601 SHIFT POSITION

SEC-85

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

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.

3. Perform DTC CONFIRMATION PROCEDURE for B2601. Refer to 

SEC-84, "DTC Logic"

.

Is DTC detected?

YES

>> Replace IPDM E/R. Refer to 

PCS-29, "Removal and Installation"

.

NO

>> Inspection End.

IPDM E/R

VCM

Continuity

Connector

Terminal

Connector

Terminal

E17

64

E61

48

Yes