LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 1989 >> Eldorado >> Repair and Diagnosis >> Engine Performance >> Ignition System - HEI-Est >> Testing >> ESC Performance Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

ESC Performance Check

For testing of ESC system, see appropriate General Motors component CHART C-5 in the appropriate TESTS W/CODES article in the ENGINE PERFORMANCE section. See following list. Perform this test for complaints of poor performance/fuel economy or detonation (knock). Perform checks only after checking ignition timing, MAP and EGR operation or if engine overheats. Also, perform appropriate DIAGNOSTIC CIRCUIT CHECK in the appropriate TESTS W/CODES article in the ENGINE PERFORMANCE section. See the following list. If Code 43 is present, proceed to appropriate chart for that code prior to performing the CHART C-5 checks.