Nissan Altima L32. Manual - part 1330

SEC-470

< COMPONENT DIAGNOSIS >

[SEDAN WITHOUT INTELLIGENT KEY]

B2602 SHIFT POSITION

B2602 SHIFT POSITION

Description

INFOID:0000000004499141

BCM confirms the shift position with the following 2 signals.

• CVT selector lever

• Speed signal from meter

DTC Logic

INFOID:0000000004499142

DTC DETECTION LOGIC

NOTE:

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

SEC-433, "DTC Logic"

.

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

SEC-434, "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-470, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004499143

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

B2602 SHIFT POSITION

SEC-471

< COMPONENT DIAGNOSIS >

[SEDAN WITHOUT INTELLIGENT KEY]

C

D

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F

G

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A

B

SEC

N

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P

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-469, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> Replace CVT device. Refer to 

TM-431, "Removal and Installation"

.

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

SEC-472

< COMPONENT DIAGNOSIS >

[SEDAN WITHOUT INTELLIGENT KEY]

B2603 SHIFT POSITION STATUS

B2603 SHIFT POSITION STATUS

Description

INFOID:0000000004499144

BCM confirms the shift position with the following 2 signals.

• CVT selector lever

• P/N position switch

DTC Logic

INFOID:0000000004499145

DTC DETECTION LOGIC

NOTE:

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

SEC-433, "DTC Logic"

.

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

SEC-434, "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-472, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004499146

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

B2603 SHIFT POSITION STATUS

SEC-473

< COMPONENT DIAGNOSIS >

[SEDAN WITHOUT INTELLIGENT KEY]

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SEC

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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

ALKIA1317ZZ

CVT device (park position switch)

Ground

Voltage [V]

Connector

Terminal

M23

8

Ground

Battery voltage

ALKIA0444ZZ

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