Check "B" Terminal Circuit

WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK "B" TERMINAL CONNECTION
Check to see if "B" terminal is clean and tight.

OK or NG
1. OK: GO TO 2. Confirm repair by performing complete Battery/Starting/Charging system test.
2. NG: Repair "B" terminal connection.
CHECK GENERATOR "B" TERMINAL CIRCUIT
Check voltage between generator connector F2 terminal B (B/R) and ground using a digital circuit tester.

Battery voltage should exist.

OK or NG
1. OK: GO TO 3.
2. NG: Check the following.
  - 120A fusible link (letter a , located in fusible link box)
  - Harness for open or short between generator and fusible link
    
    Fig 1: Measuring Voltage Between Generator Connector F2 Terminal B (B/R) And Ground
    Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK "B" TERMINAL CONNECTION QUALITY (VOLTAGE DROP TEST)
Check voltage between generator connector F2 terminal B (B/R) and battery positive terminal using a digital tester.

With engine running at idle and warm: Less than 0.2V

OK or NG
1. OK: Replace the generator. Confirm repair by performing complete Battery/Starting/Charging system test.
2. NG: Check harness between the battery and the generator for poor continuity.
  
  Fig 2: Measuring Voltage Between Generator Connector F2 Terminal B (B/R) And Battery
  Courtesy of NISSAN MOTOR CO., U.S.A.