Power Supply and Ground Circuit Inspection

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 Infiniti FX45, 2005 Infiniti FX35, 2004 Infiniti FX45, 2004 Infiniti FX35, and 2003 Infiniti FX45. However, it is still accessible from the selected car via links, so may be relevant.

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

Fig 1: Fuses Diagnosis Table
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 2.
2. NG: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to "POWER SUPPLY ROUTING CIRCUIT ".
CHECK POWER SUPPLY CIRCUIT
1. Check voltage between combination meter harness connector M20 terminals 8 (R/W), 7 (G/Y) and ground.
  
  Fig 2: Voltage Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Checking Voltage Between Terminals 8, 7 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check voltage between unified meter and A/C amp. harness connector terminals and ground.
Fig 4: Voltage Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 5: Checking Voltage Between Unified Meter And A/C Amp. Harness Connector Terminals And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 3.
2. NG: Check the following.
  - Harness between combination meter and fuse
  - Harness between unified meter and A/C amp. and fuse
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 M20 terminals 5 (B), 6 (B), 15 (B) and ground.
  1. 5 (B) - Ground
  2. 6 (B) - Ground: Continuity should exist.
  3. 15 (B) - Ground
  Fig 6: Checking Continuity Between Terminals 5, 6, 15 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity between unified meter and A/C amp. harness connector M56 terminals 29 (B), 30 (B) and ground.
  1. 29 (B) - Ground: Continuity should exist.
  2. 30 (B) - Ground
OK or NG
1. OK: INSPECTION END
2. NG: Repair harness or connector.
Fig 7: Checking Continuity Between Terminals 29, 30 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.