Infiniti QX56 (Z62). Manual - part 18

B2128 UART COMMUNICATION LINE

ADP-65

< DTC/CIRCUIT 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-40, "Intermittent Incident"

.

NO

>> Repair or replace harness or connector.

Driver seat control unit

Ground

Continuity 

Connector

Terminal

B452

2

Not existed

ADP-66

< DTC/CIRCUIT DIAGNOSIS >

B2130 EEPROM

B2130 EEPROM

DTC Logic

INFOID:0000000006248351

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

STEP 1

Turn ignition switch ON.

>> GO TO 2.

2.

STEP 2

Check “Self diagnostic result” with CONSULT-III.

Is the DTC detected? 

YES

>> Perform diagnosis procedure. Refer to 

ADP-66, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006248352

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Check “Self diagnostic result” with CONSULT-III.

3.

Erase the DTC.

4.

Perform DTC confirmation procedure. Refer to 

ADP-66, "DTC Logic"

.

Is the DTC displayed again?

YES

>> GO TO 2.

NO

>> Check intermittent incident. Refer to 

GI-40, "Intermittent Incident"

.

2.

REPLACE DRIVER SEAT CONTROL UNIT

Replace driver seat control unit.

>> INSPECTION END

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2130

EEPROM

Driver seat control unit detected CPU malfunction.

Driver seat control unit

POWER SUPPLY AND GROUND CIRCUIT

ADP-67

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

ADP

N

O

P

POWER SUPPLY AND GROUND CIRCUIT

DRIVER SEAT CONTROL UNIT

DRIVER SEAT CONTROL UNIT : Diagnosis Procedure

INFOID:0000000006248353

1.

CHECK FUSE

Check that the following fuse and fusible link are not fusing.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected circuit.

2.

CHECK DRIVER SEAT CONTROL UNIT POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect driver seat control unit connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK DRIVER SEAT CONTROL UNIT GROUND CIRCUIT

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

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace harness.

DRIVER SEAT CONTROL UNIT : Special Repair Requirement

INFOID:0000000006248354

1.

PERFORM ADDITIONAL SERVICE

Perform additional service when removing battery negative terminal.

>> Refer to 

ADP-51, "ADDITIONAL SERVICE WHEN REMOVING BATTERY NEGATIVE TERMI-

NAL : Description"

.

AUTOMATIC DRIVE POSITIONER CONTROL UNIT

AUTOMATIC DRIVE POSITIONER CONTROL UNIT : Diagnosis Procedure

INFOID:0000000006248355

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 FUSE

Check that the following fuse and fusible link are not fusing.

Signal name

Fuse No.

Battery power supply

K (50 A)

(+)

(-)

Voltage (V)

(Approx.)

Driver seat control unit

Connector

Terminals

B451

33

Ground

Battery voltage

Driver seat control unit

Ground

Continuity 

Connector

Terminal

B451

43

Existed

ADP-68

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected circuit.

2.

CHECK AUTOMATIC DRIVE POSITIONER CONTROL UNIT POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect automatic drive positioner control unit connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK AUTOMATIC DRIVE POSITIONER CONTROL UNIT GROUND CIRCUIT

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

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace harness.

AUTOMATIC DRIVE POSITIONER CONTROL UNIT : Special Repair Requirement

INFOID:0000000006248356

1.

PERFORM ADDITIONAL SERVICE

Perform additional service when removing battery negative terminal.

>> Refer to 

ADP-51, "ADDITIONAL SERVICE WHEN REMOVING BATTERY NEGATIVE TERMI-

NAL : Description"

.

Signal name

Fuse No.

Battery power supply

K (50 A)

(+)

(-)

Voltage (V)

(Approx.)

Automatic drive positioner control unit

Connector

Terminals

M104

25

Ground

Battery voltage

Automatic drive positioner control unit

Ground

Continuity 

Connector

Terminal

M104

30

Existed