Vehicle Speed Signal Check (With Monochrome Display Unit)

WARNING: This page is about a different car, the 2006 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display unit connector M93 and combination meter connector M24.
3. Check continuity between display unit harness connector M93 terminal 7 and combination meter harness connector M24 terminal 14.
  Continuity should exist.
4. Check continuity between display unit harness connector M93 terminal 7 and ground.
  Continuity should not exist.
  
  Fig 1: Checking Display Unit & Combination Meter And Display Unit & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 2.

NG: Repair harness.
CHECK VEHICLE SPEED SIGNAL
1. Connect display unit and combination meter connectors.
2. Drive vehicle at a constant speed.
3. Check the signal between display unit harness connector M93 terminal 7 and ground with CONSULT-II or oscilloscope.
  7 - Ground: Refer to , " TERMINALS AND REFERENCE VALUE FOR DISPLAY UNIT (WITH MONOCHROME DISPLAY UNIT) ".
Fig 2: Checking Vehicle Speed Signal
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Replace display unit. Refer to , "DISPLAY UNIT ".

NG: Check combination meter system. Refer to , "VEHICLE SPEED SIGNAL INSPECTION ".