Vehicle Speed Signal Check for NAVI Control 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 NAVI control unit connector P107, display control unit connector M94 and combination meter connector M24.
3. Check continuity between NAVI control unit harness connector P107 (B) terminal 66 and combination meter harness connector M24 (A) terminal 14.
  Continuity should exist.
4. Check continuity between NAVI control unit harness connector P107 (B) terminal 66 and ground.
  Continuity should not exist.
Fig 1: Checking Continuity Between NAVI Control Unit & Combination Meter And NAVI Control Unit & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 2.

NG: Repair harness.
CHECK 1: VEHICLE SPEED SIGNAL
1. Connect NAVI control unit connector, display control unit connector and combination meter connector.
2. Turn ignition switch ON.
3. Check voltage between NAVI control unit harness connector P107 terminal 66 and ground.
  Approx. 3.5V or more
Fig 2: Checking Voltage Between NAVI Control Unit And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 3.

NG: Replace NAVI control unit. Refer to , "NAVI CONTROL UNIT ".
CHECK 2: VEHICLE SPEED SIGNAL
1. Drive vehicle at a constant speed.
2. Check signal between NAVI control unit harness connector P107 terminal 66 and ground with CONSULT-II or oscilloscope.
  66 - Ground: Refer to , " TERMINALS AND REFERENCE VALUE FOR NAVI CONTROL UNIT ".
Fig 3: Checking Voltage Between NAVI Control Unit And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Replace NAVI control unit. Refer to , "NAVI CONTROL UNIT ".

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