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Home >> Isuzu >> 1989 >> I-Mark LS >> Repair and Diagnosis >> Engine Performance >> System >> Tests W/Codes - CARBURETED >> Entering Self-Diagnostics >> Notes

Entering Self-Diagnostics: Notes

CAUTION: DO NOT enter self-diagnostic system until all basic engine checks (engine, fuel and spark) have been performed. See BASIC DIAGNOSTIC PROCEDURE article in this section.
  1. Verify "CHECK ENGINE" light circuit is operational.
  2. On I-Mark models, install jumper wire between terminals "A" and "C" of ALDL connector with ignition on. See Figure .