Toyota 30CL4300.cuw Firmware: Tundra ECM Calibration
Learn how Toyota 30CL4300.cuw relates to the 2014 Tundra ECM and a service bulletin for diagnostic code P2610.
30CL4300.cuw is an engine control module calibration associated with the 2014 Toyota Tundra. Toyota identifies calibration 30CL4300 as a previous version in a service bulletin addressing a malfunction indicator light and diagnostic trouble code P2610.
What the calibration controls
The engine control module, or ECM, manages engine operation and monitors emissions-related systems. P2610 concerns the ECM or powertrain control module’s internal engine-off timer performance. That timer helps the controller track how long the engine has been stopped for diagnostic and control purposes.
The bulletin connects 30CL4300 with an ECM software update for the P2610 condition. It does not establish that every vehicle carrying this calibration will display the code, or that the calibration changes a particular driving feature.
Service bulletin context
Toyota service bulletin T-SB-0146-16, released on October 11, 2016, lists 30CL4300 as a previous calibration for the 2014 Tundra. The bulletin addresses a malfunction indicator light associated with P2610. Any correction described by the bulletin belongs to the updated calibration, not to 30CL4300 itself.
For diagnosis, the illuminated warning light and stored code provide the practical context. The calibration identifier helps distinguish the ECM software version from the diagnostic code, which identifies the condition being investigated.