Toyota 30CL3400.cuw Firmware for the 2014 Tundra
Learn how Toyota 30CL3400.cuw relates to a 2014 Tundra engine control calibration and a P2610 check-engine light bulletin.
30CL3400.cuw is an updated engine control calibration listed for the 2014 Toyota Tundra in Toyota service bulletin T-SB-0146-16. The bulletin addresses an illuminated malfunction indicator light, or check-engine light, associated with diagnostic trouble code P2610.
What the calibration controls
The engine control module manages engine operation and monitors systems for faults. P2610 concerns the module’s internal engine-off timer, which tracks how long the engine has been off. That timing information is used by onboard diagnostic routines that depend on the interval between engine operation cycles.
The bulletin identifies 30CL3400 as an updated calibration for this concern. Its practical purpose in the bulletin is to address the P2610-related warning light through revised engine control software. The record does not describe the specific software logic changed.
Diagnostic context
A check-engine light can appear for many reasons. P2610 identifies the engine-off timer concern covered by this bulletin, but the code and vehicle calibration must be checked in context rather than assumed from the warning light alone.
The catalog identifier 30CL3400.cuw names the firmware file associated with calibration 30CL3400. The documented vehicle application is the 2014 Toyota Tundra listed in T-SB-0146-16.