Chart A-2, Check Engine Light Won't Flash, On All The Time

WARNING: This page is about a different car, the 1992 Geo Prizm. However, it is still accessible from the selected car via links, so may be relevant.

With ignition switch in the ON position and engine not running, CHECK ENGINE light should always be on. With check connector terminal grounded, the CHECK ENGINE light will flash on and off rapidly, or will flash any stored trouble codes. A steady CHECK ENGINE light may be a short to ground or an open diagnostic terminal.

NOTE: Test numbers refer to test numbers on diagnostic chart.

This checks for a grounded light circuit.
This determines whether problem is an open check connector terminal or a faulty ECM.

Fig 1: Chart A-2 Schematic (Except GSi) CHECK ENGINE Light Won't Flash, On All The Time

Fig 2: Chart A-2 Flow Chart (Except GSi) CHECK ENGINE Light Won't Flash, On All The Time