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Home >> Subaru >> 1988 >> Justy DL >> Repair and Diagnosis >> Engine Performance >> System >> EFC Carburetor System >> Component Testing >> Diagnostic Procedure
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Diagnostic Procedure

  1. Prior to diagnosis, ensure that all connectors, air hoses and vacuum hoses are properly connected. Also check all parts and electric wiring for cuts or damage. Be sure to turn ignition switch to "OFF" position before replacing a defective part. Reconnect all hoses and connectors before ignition switch is turned to "ON" position.
  2. Self-diagnostic function is available in 2 modes: Regular (U-Check) Mode and Diagnostic (D-Check) Mode. Regular Mode is a continual function. Diagnostic Mode is obtained by connecting test mode connectors. Diagnostic mode connector must always be disconnected after performing tests.
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