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Home >> Isuzu >> 1992 >> Impulse RS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Ignition System >> Timing Control Systems >> Electronic Spark Timing (EST) (Non-Turbo)
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Electronic Spark Timing (EST) (Non-Turbo)

  1. To check system operation, check timing at 1500 RPM with ALDL ungrounded. Locate ALDL connector. ALDL is located behind right side of instrument panel. See Fig 1 .
  2. Install jumper wire between terminals No. 1 and 3 of ALDL connector. See Fig 1 . Note timing at 1500 RPM. If timing changes, system is operating correctly.
NOTE: If a problem develops with EST, ECM will set Code 42. For additional testing procedures, see appropriate TESTS W/CODES article in the ENGINE PERFORMANCE Section.
Fig 1: Grounding ALDL Connector (Non-Turbo)
G92I27225Courtesy of ISUZU MOTOR CO.
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