Acura 3.5 RL Manual page 855

Engine Output Control
When the TCS is activated, the TCS control unit signals the TCS control valve actuator and PCM. The actuator is linked to
the TCS control valve which is normally returned to the fully open position by the two return springs. Although the throttle
valve is still within the driver's control, the engine output is relaxed by the TCS control valve and PCM to achieve optimum
traction.
TCS CONTROL VALVE
DURING NORMAL DRIVING:
TCS CONTROL VALVE
TCS CONTROL VALVE
ACTUATOR (DC MOTOR)
TCS CONTROL VALVE SENSOR
TCS CONTROL VALVE
RETURN SPRINGS
TCS CONTROL VALVE
ACTUATOR (DC MOTOR)
DURING TCS ACTUATION:
TCS CONTROL VALVE
RETURN SPRINGS
TCS ACTUATION SIGNAL
FROM TCS CONTROL UNIT