LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 1260 (Combination Meters) >> Combination Meters >> CAN Communication System Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

CAN Communication System Inspection

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CAN COMMUNICATION 1 
    1. Start engine.
    2. Select "CAN DIAG SUPPORT MNTR" in "DATA MONITOR" mode for "METER A/C AMP" with CONSULT-II.
    3. Print out CONSULT-II screen, then go to "CAN system". Refer to CAN COMMUNICATION .
      NORMAL CONDITIONS SPECIFICATION

      Normal conditions Error conditions (examples)
      CAN CIRC 1: OK CAN CIRC 1: UNKWN
      CAN CIRC 2: OK CAN CIRC 2: UNKWN
      CAN CIRC 3: OK(1) CAN CIRC 3: UNKWN
      CAN CIRC 4: OK CAN CIRC 4: UNKWN
      CAN CIRC 5: OK CAN CIRC 5: UNKWN
      CAN CIRC 6: OK CAN CIRC 6: UNKWN
      CAN CIRC 7: OK CAN CIRC 7: UNKWN
      CAN CIRC 8: UNKWN CAN CIRC 8: UNKWN
      CAN CIRC 9: UNKWN CAN CIRC 9: UNKWN
      CAN CIRC 10: UNKWN CAN CIRC 10: UNKWN
      CAN CIRC 11: UNKWN CAN CIRC 11: UNKWN
      CAN CIRC 12: UNKWN CAN CIRC 12: UNKWN
      CAN CIRC 13: UNKWN CAN CIRC 13: UNKWN
      CAN CIRC 14: UNKWN CAN CIRC 14: UNKWN
      CAN 1 STAT: 0 CAN 1 STAT: 40
      CAN 2 STAT: 0 CAN 2 STAT: 40
      CAN 3 STAT: 0 CAN 3 STAT: 40
      CAN 4 SAT: 0 CAN 4 STAT: 40
      CAN 5 STAT: 0 CAN 5 STAT: 40
      CAN 6 STAT: 0 CAN 6 STAT: 40
      CAN 7 STAT: 0 CAN 7 STAT: 40
      CAN 8 STAT: 0 CAN 8 STAT: 0
      CAN 9 STAT: 0 CAN 9 STAT: 0
      CAN 10 STAT: 0 CAN 10 STAT: 0
      CAN 11 STAT:0 CAN 11 STAT:0
      CAN 12 STAT: 0 CAN 12 STAT: 0
      CAN 13 STAT: 0 CAN 13 STAT: 0
      CAN 14 STAT: 0 CAN 14 STAT: 0
      (1) For M/T models"UNKWN" is always indicated.
    4. Check combination meter and unified meter and A/C amp. component and harness connector terminals for looseness or bent terminals.

    OK or NG

    1. OK: GO TO 2.
    2. NG: Repair terminal or connector.
  2. CHECK METER/GAUGES VISUALLY 

    Does the pointer on the meter/gauges fluctuate when starting the engine?

    Is the fluctuation acceptable?

    1. YES: GO TO 3.
    2. NO: GO TO  6 .
  3. CHECK CONTINUITY COMMUNICATION CIRCUIT (TX: COMBINATION METER) 
    1. Turn ignition switch OFF.
    2. Disconnect combination meter and unified meter and A/C amp. connectors.
    3. Check continuity between combination meter harness connector M24 terminal 22 (BRA') and unified meter and A/C amp. harness connector M49 terminal 19 (BR/Y).
      Fig 1: Checking Continuity Communication Circuit
      G03495341Courtesy of NISSAN MOTOR CO., U.S.A.
      1. Continuity should exist. 
    4. Check continuity between combination meter harness connector M24 terminal 22 (BR/Y) and ground.
    1. Continuity should not exist. 

    OK or NG

    1. OK: GO TO 4.
    2. NG: Repair harness or connector.
  4. CHECK VOLTAGE OF UNIFIED METER AND A/C AMP. 
    1. Connect unified meter and A/C amp. connector.
    2. Turn ignition switch ON.
    3. Check voltage between combination meter harness connector M24 terminal 22 (BR/Y) and ground.
    1. Approx. 5V 

    OK or NG

    OK: GO TO 5.

    NG: Replace the unified meter and A/C amp. Refer to REMOVAL AND INSTALLATION OF UNIFIED METER AND .

    Fig 2: Checking Voltage Of Unified Meter & A/C Amp
    G03495342Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK VOLTAGE SIGNAL OF COMBINATION METER 
    1. Turn ignition switch OFF and connect combination meter connector.
    2. Turn ignition switch ON.
    3. Check voltage signal between combination meter harness connector M24 terminal 22 (BR/Y) and ground with simple oscilloscope of CONSULT-II.

      22 (BR/Y) - Ground 

      Fig 3: Identifying 22 (BR/Y) - Ground
      G03495343Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 4: Checking Voltage Signal Of Combination Meter
      G03495344Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: Replace the unified meter and A/C amp. Refer to REMOVAL AND INSTALLATION OF UNIFIED METER AND .
    2. NG: Replace the combination meter, refer to "REMOVAL AND INSTALLATION OF COMBINATION METER  ".
  6. CHECK CONTINUITY COMMUNICATION CIRCUIT (RX: COMBINATION METER) 
    1. Turn ignition switch OFF.
    2. Disconnect combination meter and unified meter and A/C amp. connectors.
    3. Check continuity between combination meter harness connector M24 terminal 21 (L/W) and unified meter and A/C amp. harness connector M49 terminal 9 (L/W).
      1. Continuity should exist. 
    4. Check continuity between combination meter harness connector M24 terminal 21 (L/W) and ground.
    1. Continuity should not exist. 
    Fig 5: Checking Continuity Communication Circuit
    G03495345Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: GO TO 7.
    2. NG: Repair harness or connector.
  7. CHECK VOLTAGE OF COMBINATION METER 
    1. Connect combination meter connector.
    2. Turn ignition switch ON.
    3. Check voltage between unified meter and A/C amp. harness connector M49 terminal 9 (L/W) and ground.
    1. Approx. 5V 

    OK or NG

    1. OK: GO TO 8.
    2. NG: Replace the combination meter, refer to "REMOVAL AND INSTALLATION OF COMBINATION METER  ".
    Fig 6: Checking Voltage Of Combination Meter
    G03495346Courtesy of NISSAN MOTOR CO., U.S.A.
  8. CHECK VOLTAGE SIGNAL OF UNIFIED METER AND A/C AMP. 
    1. Turn ignition switch OFF and connect unified meter and A/C amp. connector.
    2. Turn ignition switch ON.
    3. Check voltage signal between combination meter harness connector M24 terminal 21 (L/W) and ground with simple oscilloscope of CONSULT-II.
    1. 21 (L/W) - Ground: 
    Fig 7: Identifying 21 (L/W) - Ground
    G03495347Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 8: Checking Voltage Signal Of Unified Meter And A/C Amp
    G03495348Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: Replace the combination meter.
    2. NG: Replace the unified meter and A/C amp. Refer to REMOVAL AND INSTALLATION OF UNIFIED METER AND .
scientia non olet · About LEMON Manuals