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Home >> Isuzu >> 1985 >> Trooper II 2.2 S, MSG5L >> Repair and Diagnosis >> Engine Performance >> System >> Feedback Carburetor System >> Testing >> Diagnostic Procedure >> Entering Diagnostic Mode

Entering Diagnostic Mode

  1. Turn ignition "ON". "CHECK ENGINE" lamp should glow. Locate diagnostic test leads taped to wire harness: Near hood release latch on P'UP; and behind right side of radio on Trooper II.
  2. Connect terminals together and note "CHECK ENGINE" lamp. The "CHECK ENGINE" light will flash trouble code 12 once, pause a short time, then code 12 will repeat 2 more times. This indicates that self-diagnostic system is working.
  3. If any trouble codes are stored in ECM memory, the "CHECK ENGINE" lamp will flash 2-digit codes. Trouble codes will be displayed from lowest to highest numbered code (3 times each) and be repeated as long as the diagnostic terminals are connected.
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