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Home >> Volvo >> 2012 >> XC90 Base, FWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Electrical Components - Design And Function >> Transmission Control Module (TCM) (TF-80SC; 2007-2014) >> Function >> Other Programs
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Other Programs

Adaptation 

The Transmission Control Module (TCM) monitors each gearshift to achieve consistent and gentle gearshifting in all driving conditions. This is achieved by means of the control module either lowering or raising the hydraulic system pressure which is used during the gearshift itself. The changes in pressure level are stored in the control module memory when the vehicle is shut down, and are retrieved when starting. This provides improved gearshift comfort and improved service life for the transmission.

Complete adaptation applies when the following conditions have been fulfilled:

Driving uphill 

The Transmission Control Module (TCM) can change the gearshift pattern slightly when driving uphill. This is to avoid close gearshifts.

Neutral control (only available on certain models) 

This function is activated when the driver stops the car and the car is stationary, at traffic lights for example. The transmission control module (TCM) then disengages the C1 clutch which releases the forward drive of the transmission and reduces the load on the engine. The function improves fuel consumption and reduces vibrations at idle speed. When the driver releases the brake, the C1 clutch engages and drive is resumed.

The following conditions must be met in order for the neutral function to activate: