Check Vehicle Speed Signal

CHECK SYMPTOM
Check that the speedometer in the combination meter operates normally.

OK or NG
- OK : GO TO 2.
- NG : Check vehicle speed signal. Refer to "COMBINATION METERS ".

CHECK FUNCTION

With CONSULT-II

With "VHCL SPEED SE" on the DATA MONITOR, Check vehicle speed signal.

MONITOR ITEM AND CONTENTS REFERENCE

Monitor item [OPERATION or UNIT]		Contents
VHCL SPEED SE	"7km/7km"	The present vehicle speed (less than 7 km/h (4 MPH), or 7 km/h (4 MPH) or higher) is displayed.

Fig 1: Display CONSULT II - Data Monitor Screen

G04130169

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

Without CONSULT-II

Perform the on-board diagnosis. Refer to "ON BOARD DIAGNOSIS FOR AUTOMATIC DRIVE POSITIONER ".

OK or NG

OK : System is OK.
NG : GO TO 3.

CHECK VEHICLE SPEED INPUT/OUTPUT

Start the engine.

Check signal between BCM connector and ground, with oscilloscope.

CONNECTORS SIGNALS REFERENCE

Connector	Terminals (Wire color)		Condition	Signal (Reference value)
Connector	(+)	(-)	Condition	Signal (Reference value)
M4	49 (P/L)	Ground	Vehicle speed is approx.40 km/h (25 MPH)

Fig 2: Identifying Signal Between BCM Connector And Ground

G04130171

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

OK or NG

OK : Replace BCM.
NG : GO TO 4.

CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and combination meter connector.
3. Check continuity between BCM connector M4 terminal 49 and combination meter connector M41 terminal 18.
  49 (P/L) - 18 (P/L) : Continuity should exist.
4. Check continuity between BCM connector M4 terminal 49 and ground.
  49 (P/L) - Ground : Continuity should not exist.
OK or NG
- OK : Check meter control unit "HOW TO PROCEED WITH TROUBLE DIAGNOSIS "
- NG : Repair or replace harness between BCM and combination meter.
  
  Fig 3: Identifying Continuity Between BCM Connector M4 Terminal 49 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.