Nissan Maxima. Manual - part 1058

B2603 SHIFT POSITION STATUS

SEC-57

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

3. Check continuity between TCM harness connector F15 (A) ter-

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

4. Check continuity between TCM harness connector F15 (A) ter-

minal 20 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK CVT SHIFT SELECT POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect CVT shift selector harness connector.

3. Check voltage between CVT shift selector harness connector

M78 terminal 8 and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK CVT SHIFT SELECTOR POWER SUPPLY CIRCUIT

1. Disconnect BCM harness connector.

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

minal 84 and CVT shift selector harness connector M78 (B) ter-

minal 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-79, "Removal and Installation"

.

NO

>> Repair harness or connector.

5.

CHECK CVT SHIFT SELECTOR CIRCUIT

1. Disconnect BCM harness connector.

TCM

BCM

Continuity

Connector

Terminal

Connector

Terminal

A:  F15

20

B:  M18

48

Yes

TCM

Ground

Continuity

Connector

Terminal

A: F15

20

Ground

No

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CVT shift selector

Ground

Voltage [V]

Connector

Terminal

M78

8

Ground

Battery voltage

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BCM

CVT shift selector

Continuity

Connector

Terminal

Connector

Terminal

A: M19

84

B: M78

8

Yes

BCM

Ground

Continuity

Connector

Terminal

A: M19

84

Ground

No

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SEC-58

< DTC/CIRCUIT DIAGNOSIS >

B2603 SHIFT POSITION STATUS

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

minal 87 and CVT shift selector harness connector M78 (B) ter-

minal 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 SHIFT SELECTOR 

Refer to 

SEC-52, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace CVT shift selector. Refer to 

TM-170, "Removal and Installation"

.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-41, "Intermittent Incident"

.

>> Inspection End.

BCM

CVT shift selector

Continuity

Connector

Terminal

Connector

Terminal

A:  M19

87

B:  M78

9

Yes

BCM

Ground

Continuity

Connector

Terminal

A: M19

87

Ground

No

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B2604 TRANSMISSION RANGE SWITCH

SEC-59

< DTC/CIRCUIT DIAGNOSIS >

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B2604 TRANSMISSION RANGE SWITCH

Description

INFOID:0000000010051969

BCM confirms the shift position with the following 4 signals.

• CVT selector lever

• Transmission range switch

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

• P position signal from TCM (CAN)

DTC Logic

INFOID:0000000010051970

DTC DETECTION LOGIC

NOTE:

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

SEC-29, "DTC Logic"

.

• If DTC B2604 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-30, "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. 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.
Is DTC detected?

YES

>> Refer to 

SEC-59, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010051971

Regarding Wiring Diagram information, refer to 

SEC-147, "Wiring Diagram"

 or 

SEC-128, "Wiring Diagram"

.

1.

CHECK DTC WITH TCM

Check “Self diagnostic result” with CONSULT. Refer to 

PCS-27, "DTC Index"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning parts.

2.

CHECK TRANSMISSION RANGE 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

TRANSMISSION 
RANGE SWITCH

BCM detects the following status for 500 ms or more 
when the ignition switch is in the ON position.
• Transmission range switch indicates vehicle is in P 

or N shift position. Signal from TCM indicates vehi-
cle is in forward or reverse gear.

• Transmission range switch indicates vehicle is in 

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

• Harness or connectors 

[The transmission range switch cir-
cuit is open or shorted.] 

• Transmission range switch
• TCM

SEC-60

< DTC/CIRCUIT DIAGNOSIS >

B2604 TRANSMISSION RANGE SWITCH

3. Check continuity between TCM harness connector F15 (A) ter-

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

4. Check continuity between TCM harness connector F15 (A) ter-

minal 20 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-41, "Intermittent Incident"

.

>> Inspection End.

TCM

BCM

Continuity

Connector

Terminal

Connector

Terminal

A: F15

20

B: M18

48

Yes

TCM

Ground

Continuity

Connector

Terminal

A: F15

20

Ground

No

ALKIA1317ZZ