Vehicle Speed Sensor Check

CHECK SPEEDOMETER OPERATION
Does speedometer operate normally?
1. Yes >> GO TO 2.
2. No >> Check speedometer and vehicle speed sensor circuit. Refer to "VEHICLE SPEED SENSOR CHECK ".
CHECK VEHICLE SPEED INPUT
With CONSULT-II

See "VHCL SPEED SE" in "DATA MONITOR" mode while driving.
NOTE:
- This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle.
- Always drive vehicle in safe speed and manner according to traffic conditions and obey all traffic laws.
  1. Is actual vehicle speed indicated?
Fig 1: Identifying Data Monitor
Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II
1. Apply wheel chocks and jack up drive wheels.
2. Disconnect ASCD control unit harness connector.
3. Check voltage between control unit terminal 22 and ground with turning drive wheels slowly by hand.
  1. Dose voltage pointer deflect?
  Fig 2: Checking Voltage Between Control Unit Terminal 22 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
Refer to wiring diagram in "FIG. 5 ".

Yes or No
1. Yes >> Vehicle speed sensor is OK.
2. No >> Check harness for open or short between ASCD control unit terminal 22 and combination meter terminal 18.