Infiniti QX56 (Z62). Manual - part 25

LIFTING SENSOR (FRONT)

ADP-93

< DTC/CIRCUIT DIAGNOSIS >

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ADP

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LIFTING SENSOR (FRONT)

Component Function Check

INFOID:0000000006248390

1.

CHECK FUNCTION

1.

Select “LIFT FR PULSE” in “Data monitor” mode with CONSULT-III.

2.

Check the lifting sensor (front) signal under the following conditions.

*1

 : The value at the seat position attained when the battery is connected is considered to be 32768.

Is the indication normal?

YES

>> INSPECTION END

NO

>> Perform diagnosis procedure. Refer to 

ADP-93, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006248391

1.

CHECK LIFTING SENSOR (FRONT) SIGNAL

1.

Turn ignition switch ON.

2.

Read the voltage signal driver seat control unit harness connector and ground with an oscilloscope.

Is the inspection result normal?

YES

>> Replace driver seat control unit.

NO

>> GO TO 2.

2.

CHECK LIFTING SENSOR (FRONT) CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect driver seat control unit and lifting motor (front) connector.

3.

Check continuity between driver seat control unit harness connector and lifting motor (front) harness con-
nector.

4.

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

Monitor item

Condition

Value

LIFT FR PULSE

Seat lifting (front)

Operate (up)

Change (increase)

*1

Operate (down)

Change (decrease)

*1

Release

No change

*1

(+)

(-)

Condition

Voltage (V)

(Approx.)

Driver seat control unit

Connector

Terminals

B452

19

Ground

Seat Lifting
(front)

Operate

Other than the 
above

0 or 5

JMJIA0119ZZ

Driver seat control unit

Lifting motor (front)

Continuity

Connector

Terminal

Connector

Terminal

B452

19

B455

19

Existed

ADP-94

< DTC/CIRCUIT DIAGNOSIS >

LIFTING SENSOR (FRONT)

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness or connector.

3.

CHECK LIFTING SENSOR (FRONT) POWER SUPPLY

1.

Connect driver seat control unit connector.

2.

Turn ignition switch ON.

3.

Check voltage between lifting motor (front) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK LIFTING SENSOR (FRONT) POWER SUPPLY CIRCUIT 

1.

Turn ignition switch OFF.

2.

Disconnect driver seat control unit connector.

3.

Check continuity between driver seat control unit harness connector and lifting motor (front) harness con-
nector.

4.

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

Is the inspection result normal?

YES

>> Replace driver seat control unit.

NO

>> Repair or replace harness or connector.

5.

CHECK LIFTING SENSOR (FRONT) GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between lifting motor (front) harness connector and ground.

Is the inspection result normal?

YES

>> Replace lifting motor (front).

NO

>> Repair or replace harness or connector.

Driver seat control unit

Ground

Continuity 

Connector

Terminal

B452

19

Not existed

(+)

(-)

Voltage (V)

(Approx.)

Lifting motor (front)

Connector

Terminals

B455

12

Ground

12

Driver seat control unit

Lifting motor (front)

Continuity

Connector

Terminal

Connector

Terminal

B452

12

B455

12

Existed

Driver seat control unit

Ground

Continuity 

Connector

Terminal

B452

12

Not existed

Lifting motor (front)

Ground

Continuity

Connector

Terminal

B455

43

Existed

LIFTING SENSOR (REAR)

ADP-95

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

ADP

N

O

P

LIFTING SENSOR (REAR)

Component Function Check

INFOID:0000000006248392

1.

CHECK FUNCTION

1.

Select “LIFT RR PULSE” in “Data monitor” mode with CONSULT-III.

2.

Check lifting sensor (rear) signal under the following conditions.

*1

 : The value at the seat position attained when the battery is connected is considered to be 32768.

Is the indication normal?

YES

>> INSPECTION END

NO

>> Perform diagnosis procedure. Refer to 

ADP-95, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006248393

1.

CHECK LIFTING SENSOR (REAR) SIGNAL

1.

Turn ignition switch ON.

2.

Read voltage signal between driver seat control unit harness connector and ground with oscilloscope.

Is the inspection result normal?

YES

>> Replace driver seat control unit.

NO

>> GO TO 2.

2.

CHECK LIFTING SENSOR (REAR) CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect driver seat control unit and lifting motor (rear) connector.

3.

Check the continuity between driver seat control unit harness connector and lifting motor (rear) harness
connector.

4.

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

Monitor item

Condition

Value

LIFT RR PULSE

Seat lifting (rear)

Operate (up)

Change (increase)

*1

Operate (down)

Change (decrease)

*1

Release

No change

*1

(+)

(-)

Condition

Voltage (V)

(Approx.)

Driver seat control unit

Connector

Terminals

B452

20

Ground

Seat Lifting
(rear)

Operate

Other than the 
above

0 or 5

JMJIA0119ZZ

Driver seat control unit

Lifting motor (rear)

Continuity

Connector

Terminal

Connector

Terminal

B452

20

B456

20

Existed

ADP-96

< DTC/CIRCUIT DIAGNOSIS >

LIFTING SENSOR (REAR)

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness or connector.

3.

CHECK LIFTING SENSOR (REAR) POWER SUPPLY

1.

Connect driver seat control unit connector.

2.

Turn ignition switch ON.

3.

Check the voltage between lifting motor (rear) harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK LIFTING SENSOR (REAR) POWER SUPPLY CIRCUIT 

1.

Turn ignition switch OFF.

2.

Disconnect driver seat control unit connector.

3.

Check the continuity between driver seat control unit harness connector and lifting motor (rear) harness
connector.

4.

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

Is the inspection result normal?

YES

>> Replace driver seat control unit.

NO

>> Repair or replace harness or connector.

5.

CHECK LIFTING SENSOR (REAR) GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check the continuity between lifting motor (rear) harness connector and ground.

Is the inspection result normal?

YES

>> Replace lifting motor (rear).

NO

>> Repair or replace harness or connector.

Driver seat control unit

Ground

Continuity 

Connector

Terminal

B452

20

Not existed

(+)

(-)

Voltage (V)

(Approx.)

Lifting motor (rear)

Connector

Terminals

B456

12

Ground

12

Driver seat control unit

Lifting motor (rear)

Continuity

Connector

Terminal

Connector

Terminal

B452

12

B456

12

Existed

Driver seat control unit

Ground

Continuity 

Connector

Terminal

B452

12

Not existed

Lifting motor (rear)

Ground

Continuity

Connector

Terminal

B456

43

Existed