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Ignition Switch (Start Signal): Sentra

  1. Measure voltage between ground and ECM terminal No. 41 (Black/Yellow wire) by backprobing. See Figure and Figure . Turn ignition switch to START position. Battery voltage should exist. With ignition switch in any other position, about zero volts should exist. If voltage is as specified, go to step  3. If voltage is not as specified, go to next step.
  2. Check fuse No. 21 (10-amp) located in fuse block. Fuse block is located under left side of instrument panel. Replace fuse, if necessary. If fuse is okay, check for open or short in Black/Yellow wire between ECM harness connector terminal No. 41 and fuse No. 21 cavity in fuse block. Repair circuit as necessary.
  3. No problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
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