Infiniti G35 (V35) Sedan. Manual - part 1176

B2603 SHIFT POSITION STATUS

SEC-59

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

4.

Check continuity between A/T assembly harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK A/T DEVICE POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect A/T device (detention switch) harness connector.

3.

Check voltage between A/T device (detention switch) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK A/T DEVICE POWER SUPPLY CIRCUIT

1.

Disconnect BCM harness connector M122.

2.

Check continuity between A/T device (detention switch) harness connector and BCM harness connector.

3.

Check continuity between A/T device (detention switch) harness connector and ground.

Is the inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-79, "Removal and Installation"

.

NO

>> Repair harness or connector.

5.

CHECK A/T DEVICE CIRCUIT

1.

Disconnect BCM harness connector M122.

2.

Check continuity between A/T device (detention switch) harness connector and BCM harness connector.

3.

Check continuity between A/T device (detention switch) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

A/T assembly

Ground

Continuity

Connector

Terminal

F51

9

Ground

Not existed

A/T device (detention switch)

Ground

Voltage [V]

Connector

Terminal

M137

10

Ground

Battery voltage

A/T device (detention switch)

BCM

Continuity

Connector

Terminal

Connector

Terminal

M137

10

M122

96

Existed

A/T device (detention switch)

Ground

Continuity

Connector

Terminal

M137

10

Ground

Not existed

A/T device

(detention switch)

BCM

Continuity

Connector

Terminal

Connector

Terminal

M137

11

M122

99

Existed

A/T device (detention switch)

Ground

Continuity

Connector

Terminal

M137

11

Ground

Not existed

SEC-60

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2603 SHIFT POSITION STATUS

6.

CHECK A/T DEVICE

Refer to 

SEC-55, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace A/T device. Refer to 

TM-232, "2WD : Removal and Installation"

 (2WD models) 

TM-234,

"AWD : Removal and Installation"

 (AWD models)

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END.

B2604 PNP SWITCH

SEC-61

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

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SEC

N

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B2604 PNP SWITCH

Description

INFOID:0000000000961380

BCM confirms the shift position with the following 4 signals.
• AT selector lever
• P/N position switch
• P position signal from IPDM E/R (CAN)
• P position signal from TCM (CAN)

DTC Logic

INFOID:0000000000961381

DTC DETECTION LOGIC

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

SEC-35, "DTC Logic"

.

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

SEC-36, "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.

-

A/T selector lever is in the P or N position

-

Do not depress the brake pedal

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

EC-137, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000000961382

1.

CHECK DTC WITH TCM

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

TM-189, "DTC Index"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace.

2.

CHECK PNP SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect A/T assembly harness connector and BCM harness connector.

3.

Check continuity between A/T assembly harness connector and BCM harness connector.

4.

Check continuity between A/T assembly harness connector and ground.

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.
• N position input signal exists. Shift position signal 

from TCM does not exist.

• N position input signal does not exist. Shift posi-

tion signal from TCM exists.

• Harness or connectors 

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

• Park/ neutral position (PNP) switch

A/T assembly

BCM

Continuity

Connector

Terminal

Connector

Terminal

F51

9

M23

140

Existed

SEC-62

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2604 PNP SWITCH

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END.

A/T assembly

Ground

Continuity

Connector

Terminal

F51

9

Ground

Not existed