1997 Isuzu Oasis SFACTORY OEM SERVICE PROCEDURE

Starter Switch Signal

NOTE: This signal informs PCM when engine is cranking. During this test transmission must be in Neutral or Park position (A/T) or clutch pedal must be depressed (M/T).
  1. Place transmission in Neutral or Park position (A/T) or depress clutch pedal (M/T). Turn ignition switch to START position. Measure voltage between PCM connector terminal A9 and terminal C6. See Figure. If battery voltage does not exist, go to next step. If battery voltage exists, starter switch signal is okay.
  2. Inspect STARTER SIGNAL fuse located in underdash fuse/relay box. If fuse is okay, repair open in wire between STARTER SIGNAL fuse and PCM connector terminal C6. See Figure. If fuse is not okay, repair short in wire between PCM connector terminal C6 and STARTER SIGNAL fuse or between PCM connector terminal C6 and PGM-FI main relay. Replace STARTER SIGNAL fuse. See WIRING DIAGRAMS article.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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