LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 1990 >> APV >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Electronic Control Module (ECM) >> ECM Service Cautions & Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

ECM Service Cautions & Notes

CAUTION: Static electricity can destroy integrated circuits within ECM. Before servicing ECM, ground yourself and work area to discharge stored electricity.
CAUTION: DO NOT  remove ECM from packaging until ready to install. Ground static-proof package BEFORE opening. DO NOT  touch electrical terminals of components unless properly grounded. DO NOT  lay electrical components on car seat, carpeting or dashboard. Use electrostatic protection mat and ground strap whenever possible. See Fig 1.
Fig 1: Replacing ECM While Using 3M Anti-Static Mat
G90F15722
NOTE: Before replacing ECM, carefully inspect all wiring and control components. Ignition switch must be in OFF position when connecting or disconnecting ECM connector.