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 POWER SUPPLY FOR STARTER MOTOR "B" TERMINAL
1. Remove the fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is released.
3. Turn the ignition switch OFF.
4. Check that the starter motor connector F27 terminal B (B/R) connection is clean and tight.
5. Check voltage between starter motor connector F27 terminal B (B/R) and ground using a digital circuit tester.
  Battery voltage should exist
1. OK or NG
2. OK: GO TO 2.
3. NG: Check harness between the battery and the starter motor for open circuit.
  
  Fig 1: Measuring Voltage Between Starter Motor Connector F27 Terminal B (B/R) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK BATTERY CABLE CONNECTION QUALITY (VOLTAGE DROP TEST)
1. Check voltage between starter motor connector F27 terminal B (B/R) and battery positive terminal using a digital circuit tester.
  Ignition switch in START: Less than 0.5V
  
  OK or NG
  1. OK: GO TO 3.
  2. NG: Check harness between the battery and the starter motor for poor continuity.
    
    Fig 2: Measuring Voltage Between Starter Motor Connector F27 Terminal B (B/R) And Battery
    Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK STARTER MOTOR GROUND CIRCUIT (VOLTAGE DROP TEST)
1. Check voltage between starter motor case and battery negative terminal using a digital circuit tester.
  Ignition switch in START: Less than 0.2V
  
  OK or NG
  1. OK: Starter motor "B" terminal circuit is OK. Further inspection is necessary. Refer to WORK FLOW .
  2. NG: Check harness between the starter motor case and ground for poor continuity.
    
    Fig 3: Measuring Voltage Between Starter Motor Case And Battery Negative Terminal
    Courtesy of NISSAN MOTOR CO., U.S.A.