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Home >> Volvo >> 2009 >> V70 >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Electrical Components - Design And Function) >> Transmission Control Module (TCM) (4T65 AWD; 2003-2006) >> TCM Diagnostic Functions >> Description Of Parameters >> Parameters, Status >> Stop (Brake) Lamp Switch
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Stop (Brake) Lamp Switch

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2014 Volvo XC90, 2013 Volvo XC90, 2012 Volvo XC90, 2011 Volvo XC90, and 2010 Volvo XC90. However, it is still accessible from the selected car via links, so may be relevant.

The engine control module (ECM) transmits a signal on the Control area network (CAN) indicating whether the stop (brake) lamp switch is activated or not. The transmission control module (TCM) uses the signal to disconnect the lock-up function when braking in order to avoid jolts in the transmission.

OFF = Stop (brake) lamp switch unaffected

ON = Stop (brake) lamp switch affected

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