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Power Supply and Ground Circuit Inspection

WARNING: This page is about a different car, the 2005 Nissan 350Z. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUSE 

    Check for blown combination meter and unified meter and A/C amp. fuses.

    Fig 1: Fuse Inspection Specifications Chart
    G02405950Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK : GO TO 2.
    • NG : If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to "POWER SUPPLY ROUTING CIRCUIT ".
  2. CHECK POWER SUPPLY CIRCUIT 
    1. Check voltage between combination meter harness connector M19 terminals 24 (R/W), 23 (G/Y), 14 (LG) and ground.
      Fig 2: Combination Meter Harness Connector M19 Terminals 24 (R/W), 23 (G/Y), 14 (LG) & Ground Voltage Specifications Table
      G02405951Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 3: Combination Meter Harness Connector M19 Terminals 24 (R/W), 23 (G/Y), 14 (LG) & Ground Voltage Test
      G02405952Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Check voltage between unified meter and A/C amp. harness connector terminals and ground.
      Fig 4: Unified Meter & A/C Amp. Harness Connector Terminals & Ground Voltage Test
      G02405953Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 5: Unified Meter & A/C Amp. Harness Connector Terminals & Ground Voltage Test
      G02405954Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK : GO TO 3.
    • NG : Check the following.
      • Harness between combination meter and fuse
      • Harness between unified meter and A/C amp. and fuse
  3. CHECK GROUND CIRCUIT 
    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 M19 terminals 10 (B), 11 (B), 12 (B) and ground.
      • 10 (B)-Ground 
      • 11 (B)- Ground : Continuity should exist. 
      • 12 (B)-Ground 
      Fig 6: Combination Meter Harness Connector M19 Terminals 10 (B), 11 (B), 12 (B) & Ground Continuity Test
      G02405955Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Check continuity between unified meter and A/C amp. harness connector M49 terminals 29 (B), 30 (B) and ground.
      • 29 (B)-Ground 
      • 30 (B)-Ground : Continuity should exist. 

    OK or NG 

    • OK : INSPECTION END
    • NG : Repair harness or connector.
    Fig 7: Unified Meter & A/C AMP. Harness Connector M49 Terminals 29 (B), 30 (B) & Ground Continuity Test
    G02405956Courtesy of NISSAN MOTOR CO., U.S.A.