Stop Lamp Switch

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2013 Volvo C70, 2012 Volvo C70, 2011 Volvo C70, 2010 Volvo C70, and 2009 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Stop Lamp Switch

Courtesy of VOLVO CARS CORPORATION

The brake light switch is located by the brake pedal lever. The stop (brake) lamp switch self-adjusts during installation. The brake control module (BCM) receives information about the status of the stop (brake) lamp switch via the engine control module (ECM). The stop (brake) lamp switch signal is used by the brake control module (BCM) to diagnose faults in the pedal position sensor. The signal is also used to disengage traction control if a fault is detected.

The stop (brake) lamp switch is supplied with power from the battery. When the switch is closed, the power for the signal is supplied through the engine control module (ECM). The engine control module (ECM) then transmits a signal via the Control area network (CAN) indicating that the stop (brake) lamp switch has been activated.

There are diagnostics for the stop (brake) lamp switch.