Vehicle Speed Signal Inspection

Preform the ABS actuator and electric unit (control unit) self-diagnosis. Refer to CONSULT-II FUNCTIONS .

Self-diagnostic results content

1. No malfunction detected: GO TO  2 .
2. Malfunction detected: Check applicable parts, and repair or replace corresponding parts.

1. Start engine and drive vehicle at approximately 40km/h (25MPH).
NOTE: Maximum voltage may be 5V due to specifications (connected units).
Fig 1: Locating Unified Meter And A/C Amp. M56 Terminal 26
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Checking Output Signal Between Unified Meter And A/C Amp. Connector M56 Terminal 26 To Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check voltage signal between unified meter and A/C amp. harness connector M56 terminal 26 (R/G) and ground with simple oscilloscope of CONSULT-II.

OK or NG

1. OK: GO TO 3.
2. NG:
   • If monitor indicates OV constantly, repair harness or connector.
   • If monitor indicates 5V or 12V constantly, replace unified meter and A/C amp. Refer to REMOVAL AND INSTALLATION OF UNIFIED METER AND A/C AMP.  .

1. Turn ignition switch OFF.
2. Disconnect combination meter connector and unified meter and A/C amp. connector.
3. Check continuity between combination meter harness connector M20 terminal 1 (R/G) and unified meter and A/C amp. harness connector M56 terminal 26 (R/G).
   Fig 3: Checking Continuity Combination Meter To Unified Meter And A/C Amp.

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

   Continuity should exist  .

OK or NG

1. OK: Replace combination meter.
2. NG: Repair harness or connector.