Infiniti G35 (V35) Sedan. Manual - part 1175

B2601 SHIFT POSITION

SEC-55

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

YES

>> GO TO 6.

NO

>> Replace A/T device. Refer to 

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

 (2WD models) 

TM-234,

"AWD : Removal and Installation"

 (AWD models)

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END.

Component Inspection

INFOID:0000000000961373

1.

CHECK A/T DEVICE (DETENTION SWITCH)

1.

Turn ignition switch OFF.

2.

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

3.

Check continuity between A/T device (detention switch) terminals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace A/T device. Refer to 

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

 (2WD models) 

TM-234,

"AWD : Removal and Installation"

 (AWD models)

A/T device (detention switch)

Condition

Continuity

Connector

Terminal

M137

10

11

A/T selector lever

P position

Not existed

Other than above

Existed

SEC-56

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2602 SHIFT POSITION

B2602 SHIFT POSITION

Description

INFOID:0000000000961374

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:0000000000961375

DTC DETECTION LOGIC

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

SEC-35, "DTC Logic"

.

• If DTC B2602 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 10 seconds.

-

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

-

Depress the brake pedal.

2.

Check “Self diagnostic result” with CONSULT-III.

Is DTC detected?

YES

>> Go to 

SEC-56, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000000961376

1.

CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT”

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

BRC-87, "DTC No. Index"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace.

2.

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 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 or more
• Ignition switch is in the ON position

• Harness or connectors 

(A/T drive circuit is open or short-
ed)

• A/T device (detention switch)
• ABS actuator and electric unit 

(control unit)

A/T device (detention switch)

Ground

Voltage [V]

Connector

Terminal

M137

10

Ground

Battery voltage

B2602 SHIFT POSITION

SEC-57

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

3.

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.

NO

>> Repair harness or connector.

4.

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 5.

NO

>> Repair harness or connector.

5.

CHECK A/T DEVICE

Refer to 

SEC-55, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace A/T device. Refer to 

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

 (2WD models) 

TM-234,

"AWD : Removal and Installation"

 (AWD models)

6.

CHECK INTERMITTETNT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END.

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

No 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

No existed

SEC-58

< COMPONENT DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

B2603 SHIFT POSITION STATUS

B2603 SHIFT POSITION STATUS

Description

INFOID:0000000000961377

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:0000000000961378

DTC DETECTION LOGIC

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

SEC-35, "DTC Logic"

.

• If DTC B2603 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 second.

-

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 

SEC-58, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000000961379

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.

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
• A/T device (detention switch): approx 0V

• Harness or connector

(A/T device circuit is open or 
shorted.)

• Harness or connectors

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

• AT device (detention switch)
• Park/neutral position (PNP) 

switch

A/T assembly

BCM

Continuity

Connector

Terminal

Connector

Terminal

F51

9

M23

140

Existed