Circuit Description

This test checks for a Traction Control System (TCS) desired torque signal failure to the PCM. PCM sends 5 volts on the desired torque circuit to the Electronic Brake and Traction Control Module (EBTCM). EBTCM then rapidly switches this circuit to ground creating a Pulse Width Modulated (PWM) frequency signal to request a specific amount of torque reduction during traction control event. DTC will set if this PWM signal is not received by the PCM for 3 seconds.