Engine Controls - System/Component Tests: Introduction

1997 Isuzu Oasis SSECTION Introduction
NOTE: For testing and diagnosis of Variable Valve Timing (VTEC) system, see DTC P1253 or DTC P1259 in the TESTS W/CODES article.

Before testing separate components or systems, perform Basic Diagnostic Procedures in the BASIC TESTING article. Since many computer-controlled and monitored components set Diagnostic Trouble Code (DTC) if they malfunction, also perform Self-Diagnostics steps in the TESTS W/CODES article.

NOTE: Before disconnecting battery, obtain anti-theft code for radio. After battery is reconnected, CODE will appear on radio display. Enter 5-digit anti-theft code using select buttons and radio will begin working. If code is entered wrong 3 times, leave radio on at least one hour and enter code correctly. Any time radio power is lost, pre-selected radio stations will have to be set. For more information, see owners manual.
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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.