FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Transmission Mode Indicator - A/T: Description and Operation

Transmission Control Indicator Lamp
The Transmission Control Indicator Lamp (TCIL) is an output signal from the PCM that controls the lamp on/off function depending on the engagement or disengagement of overdrive. Refer to Transmission Control Switch in Hardware PCM Inputs. PCM Inputs