LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Isuzu >> 1989 >> Impulse 2.0 F, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Tests W/Codes >> Self-Diagnostic System >> "Check Engine" Light
April 5, 2026: LEMON Manuals is launched! Read the announcement.

"Check Engine" Light

  1. The "CHECK ENGINE" light will come on when ignition switch is in the "ON" position and engine is not running. When engine is started, "CHECK ENGINE" light should go off. If light remains on while engine is running, trouble code is present.
  2. If light did not come on with key on and engine off, the "CHECK ENGINE" light circuit must be checked before continuing. Perform the "DIAGNOSTIC CIRCUIT CHECK" if "CHECK ENGINE" light failed to operate. Circuit checks are located with the trouble code charts.
scientia non olet · About LEMON Manuals