Nissan Maxima. Manual - part 1057

B2602 SHIFT POSITION

SEC-53

< DTC/CIRCUIT DIAGNOSIS >

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B2602 SHIFT POSITION

Description

INFOID:0000000010051963

BCM confirms the shift position with the following 2 signals.

• CVT selector lever

• Speed signal from meter

DTC Logic

INFOID:0000000010051964

DTC DETECTION LOGIC

NOTE:

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

SEC-29, "DTC Logic"

.

• If DTC B2602 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 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.
Is DTC detected?

YES

>> Refer to 

SEC-53, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010051965

Regarding Wiring Diagram information, refer to 

SEC-147, "Wiring Diagram"

 or 

SEC-128, "Wiring Diagram"

.

1.

CHECK DTC WITH “COMBINATION METER”

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 CVT SHIFT SELECTOR POWER SUPPLY

1. Turn ignition switch to ACC.

2. Disconnect CVT shift selector harness connector.

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 shorted)

• CVT shift selector
• Combination meter

SEC-54

< DTC/CIRCUIT DIAGNOSIS >

B2602 SHIFT POSITION

3. Check voltage between CVT shift selector harness connector

M78 terminal 8 and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

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.

4.

CHECK CVT SHIFT SELECTOR CIRCUIT

1. Disconnect BCM harness connector.

2. Check continuity between CVT shift selector harness connector

M78 (B) terminal 9 and BCM harness connector M19 (A) termi-

nal 87.

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

minal 87 and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK CVT SHIFT SELECTOR 

Refer to 

SEC-52, "Component Inspection"

.

Is the inspection result normal?

CVT shift selector

Ground

Voltage [V]

Connector

Terminal

 M78

8

Ground

Battery voltage

ALKIA1349ZZ

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

ALKIA0445ZZ

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

ALKIA0446ZZ

B2602 SHIFT POSITION

SEC-55

< DTC/CIRCUIT DIAGNOSIS >

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YES

>> GO TO 6.

NO

>> Replace CVT shift selector. Refer to 

TM-170, "Removal and Installation"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-41, "Intermittent Incident"

.

>> Inspection End.

SEC-56

< DTC/CIRCUIT DIAGNOSIS >

B2603 SHIFT POSITION STATUS

B2603 SHIFT POSITION STATUS

Description

INFOID:0000000010051966

BCM confirms the shift position with the following 2 signals.

• CVT selector lever

• P/N position switch

DTC Logic

INFOID:0000000010051967

DTC DETECTION LOGIC

NOTE:

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

SEC-29, "DTC Logic"

.

• If DTC B2603 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. 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.
Is DTC detected?

YES

>> Refer to 

SEC-56, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010051968

Regarding Wiring Diagram information, refer to 

SEC-147, "Wiring Diagram"

 or 

SEC-128, "Wiring Diagram"

.

1.

CHECK DTC WITH IPDM E/R

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

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.
• transmission range switch: approx. 0V
• CVT shift selector: approx. 0V

• Harness or connector

(CVT shift selector circuit is 
open or shorted.)

• Harness or connectors

[transmission range switch 
circuit is open or shorted.]

• CVT shift selector
• Transmission range switch