Vehicle Speed Signal Inspection

Perform the ABS actuator and electric unit (control unit) self-diagnosis. Refer to "CONSULT-II FUNCTIONS " (with VDC system) or "CONSULT-II FUNCTIONS " (without VDC system).

OK or NG

1. OK: GO TO 2.
2. NG: Check applicable parts.

1. Start engine and drive vehicle at approximately 40km/h (25MPH).
2. Check voltage signal between combination meter harness connector M25 terminal 14 (V/W) and ground with simple oscilloscope of CONSULT-II.
   Fig 1: Identifying Unified Meter And A/C Amp Output Signal Graph

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 2: Checking Voltage Signal Between Combination Meter Harness Connector And Ground

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

14 (V/W) - Ground: 

OK or NG

1. OK: Replace combination meter.
2. NG: GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector, display control unit connector (with NAVI), display unit connector (without NAVI) and audio unit connector (BOSE system).
3. Turn ignition switch ON.
4. Check voltage between combination meter harness connector M25 terminal 14 (V/W) and ground.

   Approx. 12V 

   Fig 3: Checking Voltage Combination Meter Harness Connector And Ground

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

OK or NG

1. OK: GO TO 4.
2. NG: Replace combination meter.

1. Disconnect combination meter connector.
2. Check continuity between combination meter harness connector M25 terminal 14 (V/W) and unified meter and A/C amp. harness connector M50 terminal 26 (V/W).

   Continuity should exist. 

3. Check continuity between combination meter harness connector M25 terminal 14 (V/W) and ground.

   Continuity should not exist. 

   Fig 4: Checking Continuity Between Combination Meter Harness Connector And Ground

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

OK or NG

1. OK: Replace unified meter and A/C amp. Refer to "REMOVAL AND INSTALLATION OF UNIFIED METER AND A/C AMP. ".
2. NG: Repair harness or connector.