Check "S" 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 "S" 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. Disconnect starter motor connector F53 (QG18DE), F32 (QR25DE) terminal S (B/Y) connector.
5. Check voltage between starter motor connector F53 (QG18DE), F32 (QR25DE) terminal S (B/Y) and ground using a digital circuit tester.
  
  Fig 1: Checking Power Supply for Starter Motor "S" Terminal
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  With the ignition switch ON: Battery voltage should exist
OK or NG
1. OK: GO TO 2.
2. NG: Check the following.
  - 40A fusible link (letter c , located in fuse and fusible link box)
  - Clutch interlock relay
  - Park/neutral position relay
  - Harness for open or short
CHECK "S" TERMINAL CONNECTION QUALITY (VOLTAGE DROP TEST)
1. Connect starter motor connector F53 (QG18DE), F32 (QR25DE) terminal S (B/Y) connector.
2. Check voltage between starter motor connector F53 (QG18DE), F32 (QR25DE) terminal S (B/Y) and battery positive terminal using a digital tester.
  With the ignition switch in: Voltage less than 1V START
  
  Fig 2: Checking "S" Terminal Connection Quality (Voltage Drop Test)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Starter motor "S" terminal circuit is OK. Further inspection is necessary. Refer to WORK FLOW .
2. NG: Check harness between the battery and the starter motor "S" terminal for poor continuity.