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Status Lights: Notes

As soon as "PCM?" is selected, the Electronic Climate Control (ECC) panel begins display of PCM Status Lights. PCM Status Lights will continue to be displayed until PCM diagnostic functions are exited. PCM Status Lights show the current state of certain discrete PCM inputs and outputs by turning on or off certain indicators on the ECC panel. See Fig 1.

Fig 1: Identifying PCM Status Indicator ID
G00118387Courtesy of GENERAL MOTORS CORP.
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