Toyota 30C59000.cuw Transmission Calibration

30C59000.cuw is a Toyota transmission-control calibration associated with the 2007 Tundra. It controls automatic transmission operation, including the hydraulic pressure regulation used to apply gears. The calibration appears as a previous version in Toyota service bulletins addressing an illuminated malfunction indicator light and diagnostic trouble code P2714.

What the calibration controls

The transmission controller uses vehicle and engine operating information to determine when to shift and how to regulate hydraulic pressure. Pressure-control solenoids help direct fluid to the appropriate clutch circuits. Their operation affects shift timing and shift feel during normal driving.

P2714 points to a performance or stuck-off condition involving a transmission pressure-control solenoid. It is a diagnostic indication, not by itself proof that the solenoid or the calibration is the sole cause of a problem.

2007 Tundra service bulletin context

Toyota bulletins TC017-07 and T-TCI-2943 list calibration ID 30C59000 as a previous calibration in connection with a malfunction indicator light and P2714 on the 2007 Tundra. The updated calibration discussed in those bulletins is the revision intended to address the documented condition. The earlier 30C59000 entry should not be described as containing that bulletin improvement.

For a vehicle showing the warning light, the calibration ID provides service context alongside the stored fault code. The bulletins establish an association with the 2007 Tundra, but the ID alone does not establish compatibility with every Tundra configuration.