Nissan Pathfinder (2008 year). Manual - part 6

B2120 ADJ PEDAL SENSOR

ADP-35

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

ADP

N

O

P

1.

Disconnect automatic drive positioner control unit and pedal
adjusting motor. 

2.

Check continuity between automatic drive positioner connector
and pedal adjusting motor connector.

3.

Check continuity between automatic drive positioner control unit
connector and ground.

OK or NG

OK

>> Replace pedal adjusting motor. 

NG

>> Repair or replace harness.

Connector

Terminal

Connector

Terminal

Continuity

A

B

Automatic drive positioner 

control unit: M33

8

Pedal adjust-

ing motor: E110

4

Yes

C

Automatic drive positioner 

control unit: M34

33

5

Yes

41

3

Yes

Connector

Terminal

Ground

Continuity

A

Automatic drive positioner control 

unit: M33

8

No

B

Automatic drive positioner control 

unit: M34

33

No

41

No

LIIA2236E

ADP-36

< COMPONENT DIAGNOSIS >

B2126 DETENT SW

B2126 DETENT SW

Description

INFOID:0000000001711001

• Park position switch is installed on A/T device. It is turned OFF when the A/T selector lever is in P position.
• The driver seat control unit judges that the A/T selector lever is in P position if continuity does not exist in this

circuit.

DTC Logic

INFOID:0000000001711002

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

 STEP 1

Drive the vehicle at 7

±

4km/h or more.

>> GO TO 2

2.

 STEP 2

Check “Self diagnostic result” with CONSULT-III.

Is the DTC detected? 

YES

>> Perform diagnosis procedure. Refer to 

ADP-36, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001711003

1.

 CHECK DTC

Check “Self diagnostic result” for BCM with CONSULT-lll.
Are other DTCs detected?

YES

>> Check The DTC.

NO

>> GO TO 2

2.

 CHECK DETENTION SWITCH SIGNAL

1.

Turn ignition switch ON.

2.

Select “DETENT SW” in “Data Monitor” mode with CONSULT-lll.

3.

Check detention switch signal under the following condition. 

Is the status normal?

YES

>> A/T device (park position switch) circuit is OK.

NO

>> GO TO 3

3.

 CHECK A/T DEVICE (PARK POSITION SWITCH) HARNESS

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2126

DETENT SW

A/T selector lever is in P position and the vehicle 
speed of 7

±

4km/h is detected.

• Harness and connectors

(Park position switch circuit is 
opened/shorted.)

• Park position switch
• Combination meter

(CAN communication )

Monitor item

Condition

Status

DETENT SW

A/T selector lever

P position

OFF

Other than above

ON

B2126 DETENT SW

ADP-37

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

ADP

N

O

P

1.

Turn ignition switch OFF.

2.

Disconnect A/T device and driver seat control unit.

3.

Check continuity between A/T device connector M203 terminal 6
and driver seat control unit connector B203 terminal 21.

4.

Check continuity between A/T device connector M203 terminal 6
and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair or replace harness.

4.

 CHECK PARK POSITION SWITCH

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

Is the inspection result normal?

YES

>> GO TO 5

NO

>> Replace A/T device. Refer to 

TM-195, "Removal and

Installation"

.

5.

 CHECK INTERMITTENT INCIDENT

Refer to 

GI-51, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace driver seat control unit.

NO

>> Repair or replace the malfunctioning part.

4 - 21

: Continuity should exist.

4 - Ground

: Continuity should not exist.

LIIA1774E

Terminals

Condition

Continuity

2

4

P position

Yes

Other than P position

No

LIIA1775E

ADP-38

< COMPONENT DIAGNOSIS >

B2128 UART COMMUNICATION LINE

B2128 UART COMMUNICATION LINE

Description

INFOID:0000000001711004

Driver seat control unit performs UART communication with the automatic drive positioner control unit using 2
communication lines, TX and RX line. Driver seat control unit receives the operation signals of pedal adjusting
switch, door mirror remote control switch, set switch and memory switch and the position signals of adjustable
pedal sensor and door mirror sensor from the automatic drive positioner control unit and transmits the opera-
tion request signal.

DTC Logic

INFOID:0000000001711005

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

 STEP 1

Turn ignition switch ON.

>> GO TO 2

2.

 STEP 2

Operate pedal adjusting switch for more than 2 seconds.

>> GO TO 3

3.

 PROCEDURE 3

Check “Self diagnostic result” with CONSULT-III.
Is the DTC detected? 

YES

>> Perform diagnosis procedure. Refer to 

ADP-38, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001711006

1.

 CHECK UART COMMUNICATION LINE CONTINUITY

1.

Turn ignition switch OFF.

2.

Disconnect driver seat control unit and automatic drive posi-
tioner control unit.

3.

Check continuity between driver seat control unit harness con-
nector and automatic drive positioner control unit harness con-
nector.

4.

Check continuity between driver seat control unit harness connector and ground.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2128

UART COMM

The communication between driver seat control unit 
and automatic drive positioner control unit is interrupt-
ed for a period of time.

• UART communication line

(UART communication line is 
open or shorted)

• Driver seat control unit
• Automatic drive positioner 

control unit

Driver seat control 

unit connector

Terminal

Automatic drive positioner 

control unit connector

Terminal

Continuity 

B202

1

M33

10

Yes

17

26

PIIA4598E

B2128 UART COMMUNICATION LINE

ADP-39

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

ADP

N

O

P

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-51, "Intermittent Incident"

.

NO

>> Repair or replace harness.

Driver seat control unit con-

nector

Terminal

Ground

Continuity 

B202

1

No

17

ADP-40

< COMPONENT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

BCM

BCM : Diagnosis Procedure

INFOID:0000000001711007

Refer to 

BCS-32, "Diagnosis Procedure"

.

BCM : Special Repair Requirement

INFOID:0000000001711008

1.

 REQUIRED WORK WHEN REPLACING BCM

Initialize control unit. Refer to CONSULT-III Operation Manual.

>> Work end.

DRIVER SEAT CONTROL UNIT

DRIVER SEAT CONTROL UNIT : Diagnosis Procedure

INFOID:0000000001711009

NOTE:
Do not disconnect the battery negative terminal and the driver seat control unit connector until DTC is con-
firmed with CONSULT-III.

1.

 CHECK POWER SUPPLY CIRCUIT 

1.

Turn ignition switch OFF.

2.

Check voltage between driver seat control unit harness connec-
tor and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>>

Check the following.

• Repair or replace harness between driver seat control unit and fuse block (J/B).
• Circuit breaker.

2.

 CHECK GROUND CIRCUIT

Check continuity between the driver seat control unit harness con-
nector and ground.

Is the inspection result normal?

YES

>> Driver seat control unit power supply and ground circuit

are OK.

NO

>> Repair or replace harness.

Terminals

Power 

source

Condition

Voltage (V)

(Approx.)

(+)

(–)

Driver seat 
control unit 

connector

Terminal

B202

6

Ground

START 

power sup-

ply

Ignition 

switch 

START

Battery 
voltage

B203

33

Battery 

power sup-

ply

Ignition 

switch 

OFF

40

LIIA1897E

Driver seat control unit

connector

Terminal

Ground

Continuity

B202

32

Yes

B203

48

PIIA4542E

POWER SUPPLY AND GROUND CIRCUIT

ADP-41

< COMPONENT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

ADP

N

O

P

DRIVER SEAT CONTROL UNIT : Special Repair Requirement

INFOID:0000000001711010

1.

 PERFORM ADDITIONAL SERVICE

Perform additional service when removing battery negative terminal.

>> Refer to Owner’s Manual.

AUTOMATIC DRIVE POSITIONER CONTROL UNIT

AUTOMATIC DRIVE POSITIONER CONTROL UNIT : Diagnosis Procedure

INFOID:0000000001711011

NOTE:
Do not disconnect the battery negative terminal and the driver seat control unit connector until DTC is con-
firmed with CONSULT-III.

1.

 CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Check voltage between automatic drive positioner control unit
harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace harness.

2.

 CHECK GROUND CIRCUIT

Check continuity between the automatic drive positioner control unit
harness connector and ground.

Is the inspection result normal?

YES

>> Automatic drive positioner control unit power supply and

ground circuit are OK.

NO

>> Repair or replace harness.

AUTOMATIC DRIVE POSITIONER CONTROL UNIT : Special Repair Requirement

INFOID:0000000001711012

1.

PERFORM ADDITIONAL SERVICE

Perform additional service when removing battery negative terminal.

>> Refer to Owner’s Manual.

Terminals

Voltage (V)

(Approx.)

(+)

(–)

Automatic drive positioner 

control unit connector

Terminal

M33

34

Ground

Battery voltage

39

PIIA4543E

Automatic drive positioner 

control unit connector

Terminal

Ground

Continuity

M33

40

Yes

48

PIIA4544E

ADP-42

< COMPONENT DIAGNOSIS >

SLIDING SWITCH

SLIDING SWITCH

Description

INFOID:0000000001711013

Sliding switch is equipped to the power seat switch LH on the seat cushion side surface. The operation signal
is input to the driver seat control unit when the sliding switch is operated.

Component Function Check

INFOID:0000000001711014

1.

 CHECK FUNCTION

1.

Select “SLIDE SW-FR”, “SLIDE SW-RR” in “Data monitor” mode with CONSULT-III. 

2.

Check sliding switch signal under the following conditions.

Is the indication normal?

YES

>> INSPECTION END

NO

>> Perform diagnosis procedure. Refer to 

ADP-42, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001711015

1.

 CHECK SLIDING SWITCH SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between driver seat control unit harness connec-
tor and ground.

Is the inspection result normal?

YES

>> GO TO 5

NO

>> GO TO 2

2.

 CHECK SLIDING SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect driver seat control unit and power seat switch LH.

3.

Check continuity between driver seat control unit harness con-
nector and power seat switch LH harness connector.

Monitor item

Condition

Status

SLIDE SW-FR

Sliding switch (forward)

Operate

ON

Release

OFF

SLIDE SW-RR

Sliding switch (backward)

Operate

ON

Release

OFF

Driver seat control 

unit connector

Terminals

Condition

Voltage (V)

(Approx.)

(+)

(–)

B202

11

Ground

Sliding 

switch

Operate 

(backward)

0

Release

Battery 
voltage

26

Operate 

(forward)

0

Release

Battery 
voltage

PIIA4577E

Driver seat control 

unit connector

Terminal

Power seat switch 

LH connector

Terminal

Continuity

B202

11

B208

7

Yes

26

1

LIIA1125E