Nissan Altima L32. Manual - part 1232

SEC-78

< COMPONENT DIAGNOSIS >

[COUPE]

B2601 SHIFT POSITION

Is the inspection result normal?

YES

>> GO TO 5

NO

>> Repair harness or connector.

5.

CHECK CVT DEVICE

Refer to 

SEC-78, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> Replace CVT device. Refer to 

TM-255, "Removal and Installation"

 (RE0F09B) or 

TM-431,

"Removal and Installation"

 (RE0F10A).

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> Inspection End.

Component Inspection

INFOID:0000000004206046

1.

CHECK CVT DEVICE (PARK POSITION SWITCH)

1. Turn ignition switch OFF.

2. Disconnect CVT device (park position switch) harness connector.

3. Check continuity between CVT device (park position switch) ter-

minals as follows.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace CVT device. Refer to 

TM-255, "Removal and Installation"

 (RE0F09B) or 

TM-431,

"Removal and Installation"

 (RE0F10A).

CVT device

(park position switch)

Ground

Continuity

Connector

Terminal

A: M23

9

Ground

No

ALKIA0448ZZ

CVT device (park position 

switch)

Condition

Continuity

Terminal

8

9

CVT selector lever

P position

No

Other than above

Yes

B2602 SHIFT POSITION

SEC-79

< COMPONENT DIAGNOSIS >

[COUPE]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B2602 SHIFT POSITION

Description

INFOID:0000000004206047

BCM confirms the shift position with the following 2 signals.

• CVT selector lever

• Speed signal from meter

DTC Logic

INFOID:0000000004206048

DTC DETECTION LOGIC

NOTE:

• If DTC B2602 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-36, "DTC Logic"

.

• If DTC B2602 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-37, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start the engine under the following conditions and wait for at least 10 seconds.

-

CVT selector lever is in the P or N position

-

Depress the brake pedal.

2. Drive the vehicle for at least 10 seconds at a speed greater than 4 km/h (2 MPH).

3. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?

YES

>> Refer to 

SEC-79, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004206049

1.

CHECK DTC WITH “COMBINATION METER”

Check “Self diagnostic result” with CONSULT-III. Refer to 

MWI-95, "DTC Index"

.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Repair or replace malfunctioning parts.

2.

CHECK CVT DEVICE POWER SUPPLY

1. Turn ignition switch to ACC.

2. Disconnect CVT device (park position switch) harness connector.

3. Check voltage between CVT device (park position switch) har-

ness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> GO TO 3

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2602

SHIFT POSITION

BCM detects the following status for 10 seconds.
• Shift position is in P position
• Vehicle speed is 4km/h (2 MPH) or more
• Ignition switch is in the ON position

• Harness or connectors 

(CVT drive circuit is open or short-
ed)

• CVT device (park position switch)
• Combination meter

CVT device (park position switch)

Ground

Voltage [V]

Connector

Terminal

M23

8

Ground

Battery voltage

ALKIA1349ZZ

SEC-80

< COMPONENT DIAGNOSIS >

[COUPE]

B2602 SHIFT POSITION

3.

CHECK CVT DEVICE POWER SUPPLY CIRCUIT

1. Disconnect BCM harness connector.

2. Check continuity between BCM harness connector M19 (A) ter-

minal 84 and CVT device (park position switch) harness connec-

tor M23 (B) terminal 8.

3. Check continuity between BCM harness connector M19 (A) ter-

minal 84 and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-96, "Removal and Installation"

.

NO

>> Repair harness or connector.

4.

CHECK CVT DEVICE CIRCUIT

1. Disconnect BCM harness connector.

2. Check continuity between CVT device (park position switch)

harness connector and BCM harness connector.

3. Check continuity between CVT device (park position switch)

harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5

NO

>> Repair harness or connector.

5.

CHECK CVT DEVICE

Refer to 

SEC-78, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> Replace CVT device. Refer to 

TM-255, "Removal and Installation"

 (RE0F09B) or 

TM-431,

"Removal and Installation"

 (RE0F10A).

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> Inspection End.

BCM

CVT device (park position switch)

Continuity

Connector

Terminal

Connector

Terminal

A: M19

84

B: M23

8

Yes

BCM

Ground

Continuity

Connector

Terminal

A: M19

84

Ground

No

ALKIA0445ZZ

BCM

CVT device (park position switch)

Continuity

Connector

Terminal

Connector

Terminal

A: M19

87

B: M23

9

Yes

BCM

Ground

Continuity

Connector

Terminal

A: M19

87

Ground

No

ALKIA0446ZZ

B2603 SHIFT POSITION STATUS

SEC-81

< COMPONENT DIAGNOSIS >

[COUPE]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

B2603 SHIFT POSITION STATUS

Description

INFOID:0000000004206050

BCM confirms the shift position with the following 2 signals.

• CVT selector lever

• P/N position switch

DTC Logic

INFOID:0000000004206051

DTC DETECTION LOGIC

NOTE:

• If DTC B2603 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-36, "DTC Logic"

.

• If DTC B2603 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-37, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start the engine under the following conditions and wait for at least 1 second.

-

CVT selector lever is in the P position.

-

Do not depress the brake pedal.

2. Shift to N and wait for at least 1 second.

3. Shift to any gear other than P or N and wait for at least 1 second.

4. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?

YES

>> Refer to 

SEC-81, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004206052

1.

CHECK DTC WITH IPDM E/R

Check “Self diagnostic result” with CONSULT-III. Refer to 

PCS-45, "DTC Index"

.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Repair or replace malfunctioning parts.

2.

CHECK PNP SWITCH CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect TCM harness connector and BCM harness connector.

DTC

Self-diagnosis 

name

DTC detecting condition

Possible causes

B2603

SHIFT POSITION 

STATUS

BCM detects the followings status for 500 ms or more when 
shift is in P position and, ignition switch is in ON position.
• Park/neutral position (PNP) switch: approx. 0V
• CVT device (park position switch): approx 0V

• Harness or connector

(CVT device circuit is open 
or shorted.)

• Harness or connectors

[Park/neutral position (PNP) 
switch circuit is open or 
shorted.]

• CVT device (park position 

switch)

• Park/neutral position (PNP) 

switch