ECM Status Lights Display
Upon entering the ECM system level of the self-diagnostic mode, the indicator lights on the ECC panel of the CCDIC automatically indicate the operational status of the Viscous Converter Clutch (VCC), certain emission control components and A/C compressor operation. Operational status of these components is indicated by their corresponding status light being on or off. See Fig 1 for diagram of relationship between status lights and specific components.