Traction Control Torque Circuits
TRACTION CONTROL DELIVERED TORQUE CIRCUITThe PCM sends a PWM signal to the Electronic Brake and Traction Control Module (EBTCM) on the delivered torque circuit informing the EBTCM of response made to the desired torque signal. A problem with the delivered torque circuit should cause an ABS/TCS DTC to set and traction control to be disabled.
TRACTION CONTROL DESIRED TORQUE CIRCUIT
The Electronic Brake and Traction Control Module (EBTCM) controls the PWM signal on the Desired Torque circuit while monitoring the wheel speed sensors to detect slippage. The PCM monitors the PWM signal and reduces engine torque as needed by retarding ignition timing, decreasing boost duty cycle, increasing air/fuel ratio, or, in severe cases, shutting OFF up to three fuel injectors. A problem with the Desired Torque circuit should cause PCM DTC P1571 and an ABS/TCS DTC to set and traction control to be disabled.