Toyota 30C85100.cuw Transmission Control Firmware
Learn how Toyota 30C85100.cuw relates to Tundra transmission control and a service bulletin addressing P2714.
30C85100.cuw is a Toyota powertrain control calibration associated with automatic transmission control on the 2008 Tundra. Toyota lists calibration ID 30C85100 as an updated calibration in service bulletin T-SB-0078-08, which addresses an illuminated malfunction indicator light and diagnostic trouble code P2714.
What the calibration controls
The powertrain controller manages transmission operation by commanding solenoids that regulate hydraulic pressure. That pressure applies transmission clutches to select gears. P2714 concerns the performance or operation of pressure control solenoid D, so a fault in this area can affect how the transmission manages a shift and can turn on the check-engine light.
The bulletin identifies 30C85100 as an updated calibration for the condition it discusses. It does not establish that this file is a universal remedy for P2714 or that every vehicle showing the code needs this calibration. The code points a technician toward a transmission pressure-control issue, but diagnosis is needed to determine its cause.
2008 Tundra service context
T-SB-0078-08 applies to the 2008 Toyota Tundra. The calibration identifier helps distinguish this software from other Toyota powertrain calibrations, while the bulletin provides the service context: a malfunction indicator light associated with P2714. The record does not specify the internal logic changes made in this revision or identify a particular engine and transmission combination for this calibration.
The filename 30C85100.cuw contains the same calibration identifier listed in the service record. No stock or modified variant label is identified for this entry.