Nissan Maxima. Manual - part 13

ADP-44

< DTC/CIRCUIT DIAGNOSIS >

B2116 TILT MOTOR

1. Connect automatic drive positioner control unit connector.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace automatic drive positioner control unit. Refer to 

ADP-170, "Removal and Installation"

.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-41, "Intermittent Incident"

.

>> INSPECTION END

(+)

(–)

Voltage (V)

(Approx.)

Automatic drive positioner control unit 

Connector

Terminals

M67

28

Ground

0

29

B2128 UART COMMUNICATION LINE

ADP-45

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

ADP

N

O

P

B2128 UART COMMUNICATION LINE

Description

INFOID:0000000010051723

Driver seat control unit performs UART communication with the automatic drive positioner control unit using 1

communication line. Driver seat control unit receives the operation signals of ADP steering switch, door mirror

remote control switch and the position signals of tilt sensor, telescopic sensor and door mirror sensors from

the automatic drive positioner control unit and transmits the operation request signal.

DTC Logic

INFOID:0000000010051724

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

 PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Check “Self diagnostic result” with CONSULT.
Is the DTC is detects?

YES

>> Refer to 

ADP-45, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010051725

Regarding Wiring Diagram information, refer to 

ADP-150, "Wiring Diagram"

. 

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Check “Self diagnostic result” with CONSULT.

3. Erase the DTC.

4. Perform DTC confirmation procedure. Refer to 

ADP-45, "DTC Logic"

.

Is the DTC displayed again?

YES

>> GO TO 2.

NO

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

2.

 CHECK UART COMMUNICATION LINE CONTINUITY

1. Turn ignition switch OFF.

2. Disconnect driver seat control unit and automatic drive positioner control unit.

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

trol unit harness connector.

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 con-

nector

Terminal

Continuity 

B203

15

M63

8

Yes

ADP-46

< DTC/CIRCUIT DIAGNOSIS >

B2128 UART COMMUNICATION LINE

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Repair or replace harness.

Driver seat control unit connector

Terminal

Ground

Continuity 

B203

15

No

POWER SUPPLY AND GROUND CIRCUIT

ADP-47

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

ADP

N

O

P

POWER SUPPLY AND GROUND CIRCUIT

BCM
BCM : Diagnosis Procedure

INFOID:0000000010062176

Regarding Wiring Diagram information, refer to 

BCS-67, "Wiring Diagram"

.

1.

 CHECK FUSE AND FUSIBLE LINK

Check if the following BCM fuses or fusible link are blown.

Is the fuse or fusible link blown?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit.

NO

>> GO TO 2

2.

 CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM.

3. Check voltage between BCM harness connector and ground.

Is the measurement normal?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

 CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair or replace harness.

DRIVER SEAT CONTROL UNIT
DRIVER SEAT CONTROL UNIT : Diagnosis Procedure

INFOID:0000000010051727

NOTE:

Do not disconnect the battery negative terminal and the driver seat control unit connector until DTC is con-

firmed with CONSULT.

Terminal No.

Signal name

Fuse and fusible link No.

1

Battery power supply

H

11

10

24

7

Terminals

Voltage

(Approx.)

(+)

(

−)

BCM

Ground

Connector

Terminal

M16

1

Battery voltage

M17

11

M18

24

BCM

Ground

Continuity

Connector

Terminal

M17

13

Yes