Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK SLIDING SENSOR SIGNAL

Turn ignition switch ON.
Read voltage signal between driver seat control unit harness connector and ground with osiloscope.

VOLTAGE REFERENCE CHART

Terminals			Condition		Voltage signal
(+)		(-)
Driver's seat control unit	Terminal	(-)
B203	18	Ground	Seat sliding	Operate	Courtesy of NISSAN MOTOR CO., U.S.A.
B203	18	Ground	Seat sliding	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

Fig 1: Checking Voltage Signal Between Driver Seat Control Unit Connector And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK SLIDING SENSOR CIRCUIT

Turn ignition switch OFF.
Disconnect driver seat control unit and front power seat LH (sliding motor).

Check continuity between driver seat control unit harness connector and front power seat LH (sliding motor) harness connector.

CONTINUITY REFERENCE CHART

Driver seat control unit		Front power seat LH (sliding motor)		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B203 (A)	18	B206 (B)	12	Yes

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

Fig 2: Checking Continuity Between Driver Seat Control Unit Harness Connector And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

CONTINUITY REFERENCE CHART

Driver seat control unit		Ground	Continuity
Connector	Terminal
B203 (A)	18		No

Is the inspection result normal?

YES: GO TO 3

NO: Repair or replace harness.

CHECK SLIDING SENSOR POWER SUPPLY

Connect driver seat control unit.
Turn ignition switch ON.
Check voltage between front power seat LH (sliding motor) harness connector and ground.

VOLTAGE REFERENCE CHART

(+)		(-)	Voltage (V) (Approx.)
Sliding motor
Connector	Terminals
B206	11	Ground	Battery voltage

Is the inspection result normal?

YES: GO TO 5

NO: GO TO 4

Fig 3: Checking Voltage Between Front Power Seat LH (Sliding Motor) Harness Connector And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK SLIDING SENSOR POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect driver seat control unit.

Check continuity between driver seat control unit harness connector and front power seat LH (sliding motor) harness connector.

CONTINUITY REFERENCE CHART

Driver seat control unit		Front power seat LH (sliding motor)		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B203 (A)	12	B206 (B)	11	Yes

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

Fig 4: Checking Continuity Between Driver Seat Control Unit Harness Connector And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

CONTINUITY REFERENCE CHART

Driver seat control unit		Ground	Continuity
Connector	Terminal
B203 (A)	12		No

Is the inspection result normal?

YES: Replace driver seat control unit. Refer to "REMOVAL AND INSTALLATION ".

NO: Repair or replace harness.

CHECK SLIDING SENSOR GROUND

Turn ignition switch OFF.
Check continuity between front power seat LH (sliding motor) harness connector and ground.

CONTINUITY REFERENCE CHART

Front power seat LH (sliding motor)		Ground	Continuity
Connector	Terminal
B206	17		Yes

Is the inspection result normal?

YES: Replace front power seat LH (sliding motor). Refer to "REMOVAL AND INSTALLATION ".

NO: Repair or replace harness.

Fig 5: Checking Continuity Between Front Power Seat LH (Sliding Motor) Harness Connector And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.