Nissan Altima L32. Manual - part 1233

SEC-82

< COMPONENT DIAGNOSIS >

[COUPE]

B2603 SHIFT POSITION STATUS

3. Check continuity between TCM harness connector F16 (A) ter-

minal 20 and BCM harness connector M18 (B) terminal 48.

4. Check continuity between TCM harness connector F16 (A) ter-

minal 20 and ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair harness or connector.

3.

CHECK CVT DEVICE POWER SUPPLY

1. Turn ignition switch OFF.

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 5

NO

>> GO TO 4

4.

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.

5.

CHECK CVT DEVICE CIRCUIT

1. Disconnect BCM harness connector.

TCM

BCM

Continuity

Connector

Terminal

Connector

Terminal

A:  F16

20

B:  M18

48

Yes

TCM

Ground

Continuity

Connector

Terminal

A: F16

20

Ground

No

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CVT device (park position switch)

Ground

Voltage [V]

Connector

Terminal

M23

8

Ground

Battery voltage

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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

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B2603 SHIFT POSITION STATUS

SEC-83

< COMPONENT DIAGNOSIS >

[COUPE]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

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

minal 87 and CVT device (park position switch) harness connec-

tor M23 (B) terminal 9.

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

minal 87 and ground.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> Repair harness or connector.

6.

CHECK CVT DEVICE

Refer to 

SEC-78, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7

NO

>> Replace CVT device. Refer to 

TM-255, "Removal and Installation"

 (RE0F09B) or 

TM-431,

"Removal and Installation"

 (RE0F10A).

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> Inspection End.

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

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SEC-84

< COMPONENT DIAGNOSIS >

[COUPE]

B2604 PNP SWITCH

B2604 PNP SWITCH

Description

INFOID:0000000004206053

BCM confirms the shift position with the following 4 signals.

• CVT selector lever

• P/N position switch

• P position signal from IPDM E/R (CAN)

• P position signal from TCM (CAN)

DTC Logic

INFOID:0000000004206054

DTC DETECTION LOGIC

NOTE:

• If DTC B2604 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-36, "DTC Logic"

.

• If DTC B2604 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 seconds.

-

CVT selector lever is in the P position

-

Do not depress the brake pedal

2. Use CVT selector lever to select each gear one at a time. Wait at each gear for at least 1 second.

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

YES

>> Refer to 

SEC-84, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004206055

1.

CHECK DTC WITH TCM

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

TM-221, "DTC Index"

 (RE0F09B) or 

TM-399, "DTC

Index"

 (RE0F10A).

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 No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2604

PNP SWITCH

BCM detects the following status for 500 ms or more 
when the ignition switch is in the ON position.
• P/N switch indicates vehicle is in P or N shift posi-

tion. Signal from TCM indicates vehicle is in forward 
or reverse gear.

• P/N switch indicates vehicle is in forward or reverse 

gear. Signal from TCM indicates vehicle is in P or N.

• Harness or connectors 

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

• Park/ neutral position (PNP) switch
• TCM

B2604 PNP SWITCH

SEC-85

< COMPONENT DIAGNOSIS >

[COUPE]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

3. Check continuity between TCM harness connector and BCM

harness connector.

4. Check continuity between TCM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair harness or connector.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> Inspection End.

TCM

BCM

Continuity

Connector

Terminal

Connector

Terminal

A:  F16

20

B:  M18

48

Yes

TCM

Ground

Continuity

Connector

Terminal

A: F16

20

Ground

No

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