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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Diagnosis - A/T >> Testing & Diagnosis (REATTA, Riviera, TORONADO & TROFEO) >> Status Light Indicators >> Notes

Status Light Indicators: Notes

During self-diagnostics, the status light display on ECCP is used to indicate switchable parameter status. Each different mode of operation is indicated by its status light being turned on or off. Status light indicators are relative to system level being tested (ECM or BCM). See Figure and Figure .