Toyota 30CM2201.cuw Firmware for the 2014 Tundra

30CM2201.cuw is an engine control module (ECM) calibration for the 2014 Toyota Tundra. Toyota identifies calibration 30CM2201 as an updated calibration in service bulletin T-SB-0146-16, which addresses a malfunction indicator light associated with diagnostic trouble code P2610.

What the calibration controls

The ECM manages engine operation using sensor inputs and programmed control strategies. It also monitors emissions-related systems and can request the malfunction indicator light, commonly called the check engine light, when it detects a fault.

DTC P2610 concerns the ECM or PCM internal engine-off timer. That timer tracks the period after the engine is switched off and supports diagnostic routines that depend on elapsed off time. A problem detected in this timing function can cause the check engine light to illuminate.

Why 30CM2201 matters

In T-SB-0146-16, Toyota lists 30CM2201 as an updated calibration for the bulletin’s 2014 Tundra application. The bulletin connects the update with the P2610 malfunction indicator light concern. It does not establish that every P2610 code is caused by the calibration, or that this revision changes the truck’s performance characteristics.

The complete calibration identifier is important when comparing a vehicle’s ECM information with the bulletin. The 2014 Tundra listing identifies the bulletin’s vehicle scope, but the calibration ID alone should not be treated as proof of compatibility with every truck in that model year.