Check "B" Terminal Circuit

WARNING: This page is about a different car, the 2002 Nissan Sentra. 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 E202 terminal B (B/R) (QG18DE), (B/Y) (QR25DE) connection is clean and tight.
5. Check voltage between starter motor connector E202 terminal B (B/R) (QG18DE), (B/Y) (QR25DE) and ground using a digital circuit tester.
  
  Fig 1: Checking Power Supply for Starter Motor "B"Terminal
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 2.
2. NG: Check harness between the battery and the starter motor for open circuit.
CHECK BATTERY CABLE CONNECTION QUALITY (VOLTAGE DROP TEST)
1. Check voltage between starter motor connector E202 terminal B (B/R) (QG18DE), (B/Y) (QR25DE) and battery positive terminal using a digital circuit tester.
  
  Fig 2: Checking Battery Cable Connection Quality (Voltage Drop Test)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: Check harness between the battery and the starter motor for poor continuity.
CHECK STARTER MOTOR GROUND CIRCUIT (VOLTAGE DROP TEST)
1. Check voltage between starter motor case and battery negative terminal using a digital circuit tester.
  
  Fig 3: Checking Starter Motor Ground Circuit (Voltage Drop Test)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Starter motor "B" terminal circuit is OK. Further inspection is necessary. Refer toWORK FLOW .
2. NG: Check the starter motor case and ground for poor continuity.