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 TILT SENSOR SIGNAL

Turn ignition switch ON.
Check voltage signal between driver seat control unit connector and ground with oscilloscope.

VOLTAGE REFERENCE CHART

(+)		(-)	Condition		Voltage (V) (Approx.)
Driver seat control unit
Connector	Terminals
B203	21	Ground	Steering column	Operate	Courtesy of NISSAN MOTOR CO., U.S.A.
B203	21	Ground	Steering column	Other than above	0 or 5

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

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

Is the inspection result normal?

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

NO: GO TO 2

CHECK TILT SENSOR CIRCUIT

Turn ignition switch OFF.
Disconnect driver seat control unit and tilt motor.

Check continuity between driver seat control unit harness connector and tilt motor harness connector.

CONTINUITY REFERENCE CHART

Driver seat control unit		Tilt motor		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B203 (A)	21	M71 (B)	5	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)	21		No

Is the inspection result normal?

YES: GO TO 3

NO: Repair or replace harness.

CHECK TILT SENSOR POWER SUPPLY

Connect driver seat control unit.
Turn ignition switch ON.
Check voltage between tilt motor harness connector and ground.

VOLTAGE REFERENCE CHART

(+)		(-)	Voltage (V) (Approx.)
Tilt motor
Connector	Terminals
M71	4	Ground	Battery voltage

Is the inspection result normal?

YES: GO TO 5

NO: GO TO 4

Fig 3: Checking Voltage Between Tilt Motor Harness Connector And Ground

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

CHECK TILT SENSOR POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect automatic drive positioner control unit.

Check continuity between automatic drive positioner control unit harness connector and tilt motor harness connector.

CONTINUITY REFERENCE CHART

Automatic drive positioner control unit		Tilt motor		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M67 (A)	27	M71 (B)	4	Yes

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

Fig 4: Checking Continuity Between Automatic Drive Positioner Control Unit Harness Connector And Ground

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

CONTINUITY REFERENCE CHART

Automatic drive positioner control unit		Ground	Continuity
Connector	Terminal
M67 (A)	27		No

Is the inspection result normal?

YES: Replace automatic drive positioner control unit. Refer to "REMOVAL AND INSTALLATION ".

NO: Repair or replace harness or connector.

CHECK TILT SENSOR GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect automatic drive positioner control unit.
Check continuity between automatic drive positioner control unit harness connector and tilt motor harness connector.

CONTINUITY REFERENCE CHART

Automatic drive positioner control unit		Tilt motor		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M63 (A)	20	M71 (B)	6	Yes

Fig 5: Checking Continuity Between Automatic Drive Positioner Control Unit Connector And Tilt Motor Connector

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

Is the inspection result normal?

YES: Replace tilt motor. Refer to "DISASSEMBLY AND ASSEMBLY ".

NO: Repair or replace harness.