Toyota 30C84100.cuw Firmware for Tundra Transmission Control
Toyota calibration 30C84100 is an updated 2008 Tundra control calibration associated with P2714 and a malfunction indicator light.
30C84100.cuw is a Toyota control calibration associated with transmission operation on the 2008 Tundra. Toyota service bulletin T-SB-0078-08 lists 30C84100 as an updated calibration for a condition involving diagnostic trouble code P2714 and the malfunction indicator light.
What the calibration controls
The engine and transmission control system manages automatic transmission shifts by commanding hydraulic pressure through electronically controlled solenoids. P2714 concerns the performance of pressure control solenoid D. A problem in this pressure-control circuit or the hydraulic system can affect how the transmission applies its internal clutches and makes shifts.
The bulletin identifies 30C84100 as an updated calibration in the context of the warning-light condition. That does not mean the code alone identifies the cause of every P2714 fault, or that the calibration resolves a mechanical or electrical defect in every vehicle.
Diagnostic context
For a 2008 Tundra with the malfunction indicator light on and P2714 stored, the bulletin provides service context for the calibration update. The exact vehicle configuration and current calibration remain relevant when determining whether that bulletin applies.