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Home >> Chevrolet >> 2001 >> Impala Base, 3.8 K >> Repair and Diagnosis >> External Pages >> Different car >> Section 20 (Anti-Lock Brake System With Traction Control System - BOSCH 5.3) >> Diagnostic Tests >> DTC C0244 Or DTC P1689: PWM Delivered Torque Malfunction >> Circuit Description

Circuit Description

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Traction control is simultaneously controlled by EBCM and PCM. PCM sends a delivered torque message via a Pulse Width Modulated (PWM) signal to EBCM confirming delivered torque level for proper traction control system operation. EBCM supplies pull up voltage.

DTC sets when ignition voltage is present and PWM signal is out of range or no signal is received for a period of 2 seconds.

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