Nissan Sentra. Manual - part 764

SEC-84

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2602 SHIFT POSITION

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace CVT shift selector. Refer to 

TM-253, "Removal and Installation"

.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> Inspection End.

Component Inspection

INFOID:0000000009756729

1.

CHECK CVT SHIFT SELECTOR (PARK POSITION SWITCH)

1. Turn ignition switch OFF.

2. Disconnect CVT shift selector connector.

3. Check continuity between CVT shift selector (park position switch) terminals.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace CVT shift selector. Refer to 

TM-253, "Removal and Installation"

.

CVT shift selector (park position switch)

Condition

Continuity

Terminal

12

13

Selector lever: P position

Selector button: Released

No

Selector button: Pressed

Yes

Selector lever: Other than P position

B2603 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

B2603 SHIFT POSITION

DTC Logic

INFOID:0000000009756730

DTC DETECTION LOGIC

NOTE:

• If DTC B2603 is displayed with DTC B2601, first perform the trouble diagnosis for DTC B2601. Refer to

SEC-80, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE 1

1. Shift the selector lever to the Park (P) position.

2. Turn ignition switch ON and wait 1 second or more.

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

YES

>> Go to 

SEC-85, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE 2

1. Shift the selector lever to the position other than Park (P) and Neutral (N), and wait 1 second or more.

2. Check DTC in Self Diagnostic Result mode of BCM using CONSULT.
Is DTC detected?

YES

>> Go to 

SEC-85, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009756731

Regarding Wiring Diagram information, refer to 

SEC-39, "Wiring Diagram"

.

1.

INSPECTION START

Perform inspection in accordance with procedure that confirms DTC.
Which procedure confirms DTC?

DTC confirmation procedure 1>>GO TO 2.

DTC confirmation procedure 2>>GO TO 8.

2.

CHECK FUSE

1. Turn power switch OFF.

2. Check that the following fuse in IPDM E/R is not blown.

Is the inspection result normal?

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible causes

B2603

SHIFT POSITION

BCM detects the following status when ignition 
switch is in the ON position.
• Transmission range switch signal: approx. 0 V
• CVT shift selector (park position switch) sig-

nal: approx. 0 V

• Harness or connector

[CVT shift selector (park position  
switch) circuit is open or shorted.]

• Harness or connectors

(Transmission range switch circuit is 
open or shorted.)

• CVT shift selector (park position 

switch)

• Transmission range switch
• BCM

Signal name

Fuse No.

Ignition power supply

46 (10 A)

SEC-86

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2603 SHIFT POSITION

YES

>> GO TO 3.

NO

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

3.

CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY

1. Disconnect transmission range switch connector.

2. Turn ignition switch ON.

3. Check voltage between transmission range switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R connector.

3. Check continuity between transmission range switch harness connector and IPDM E/R harness connec-

tor.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-30, "Removal and Installation"

.

NO

>> Repair or replace harness.

5.

CHECK BCM INPUT SIGNAL

1. Turn ignition switch OFF.

2. Connect transmission range switch harness connector.

3. Turn ignition switch ON.

4. Check voltage between BCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> GO TO 6.

6.

CHECK BCM INPUT SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect transmission range switch connector.

3. Disconnect BCM connector.

4. Check continuity between transmission range switch harness connector and BCM harness connector.

Is the inspection result normal?

(+)

(–)

Voltage (V)

(Approx.)

Transmission range switch

Connector

Terminal

F26

7

Ground

Battery voltage

Transmission range switch

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

F26

7

E43

14

Yes

(+)

(–)

Condition

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M83

69

Ground

Selector lever

P or N position

Battery voltage

Other than above

0

Transmission range switch

BCM

Continuity

Connector

Terminal

Connector

Terminal

F26

10

M83

69

Yes

B2603 SHIFT POSITION

SEC-87

< DTC/CIRCUIT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

YES

>> GO TO 7.

NO

>> Repair or replace harness.

7.

CHECK TRANSMISSION RANGE SWITCH

Refer to 

SEC-88, "Component Inspection (Transmission Range Switch)"

.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> Replace transmission range switch. 

8.

CHECK CVT SHIFT SELECTOR POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect CVT shift selector (park position switch) connector.

3. Turn ignition switch ON.

4. Check voltage between CVT shift selector (park position switch) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 9.

9.

CHECK CVT SHIFT SELECTOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM connector.

3. Check continuity between CVT shift selector (park position switch) harness connector and BCM harness

connector.

4. Check continuity between CVT shift selector (park position switch) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> Repair or replace harness.

10.

CHECK CVT SHIFT SELECTOR CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM connector.

3. Check continuity between CVT shift selector (park position switch) harness connector and BCM harness

connector.

4. Check continuity between CVT shift selector (park position switch) harness connector and ground.

(+)

(–)

Voltage (V)

(Approx.)

CVT shift selector (park position switch)

Connector

Terminal

M38

12

Ground

12

CVT shift selector (park position switch)

BCM

Continuity

Connector

Terminal

Connector

Terminal

M38

12

M83

67

Yes

CVT shift selector (park position switch)

Ground

Continuity

Connector

Terminal

M38

12

No

CVT shift selector (park position switch)

BCM

Continuity

Connector

Terminal

Connector

Terminal

M38

13

M84

37

Yes