Automatic Drive Positioner (DTC/Circuit Diagnosis)

1. Turn ignition switch ON.
2. Read the voltage signal between driver seat control unit harness connector and ground with an oscilloscope.

   (+)		(-)	Condition		Voltage signal
   Driver seat control unit
   Connector	Terminal
   B209	30	Ground	Seat lifting (front)	Operate	Courtesy of NISSAN NORTH AMERICA, INC.
   				Other than above	0 or 5

Is the inspection result normal?

YES

Replace driver seat control unit. Refer to Removal and Installation .

NO

GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and lifting motor LH (front).
3. Check continuity between driver seat control unit harness connector and lifting motor LH (front) harness connector.

   Driver seat control unit		Lifting motor LH (front)		Continuity
   Connector	Terminal	Connector	Terminal
   B209	30	B218	1	Yes

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

   Driver seat control unit		Ground	Continuity
   Connector	Terminal
   B209	30		No

Is the inspection result normal?

YES

GO TO 3.

NO

Repair or replace harness.

1. Connect driver seat control unit.
2. Turn ignition switch ON.
3. Check voltage between lifting motor LH (front) harness connector and ground.

   (+)		(-)	Voltage (V) (Approx.)
   Lifting motor LH (front)
   Connector	Terminals
   B218	3	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO 5.

NO

GO TO 4.

1. Turn ignition switch OFF.
2. Disconnect driver seat control unit.
3. Check continuity between driver seat control unit harness connector and lifting motor LH (front) harness connector.

   Driver seat control unit		Lifting motor LH (front)		Continuity
   Connector	Terminal	Connector	Terminal
   B209	5	B218	3	Yes

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

   Driver seat control unit		Ground	Continuity
   Connector	Terminal
   B209	5		No

Is the inspection result normal?

YES

Replace driver seat control unit. Refer to Removal and Installation .

NO

Repair or replace harness.

1. Turn ignition switch OFF.
2. Check continuity between lifting motor LH (front) harness connector and ground.

   Lifting motor LH (front)		Ground	Continuity
   Connector	Terminal
   B218	2		Yes

Is the inspection result normal?

YES

Replace lifting motor LH (front). Refer to Removal and Installation .

NO

Repair or replace harness.