Conditions for Setting the DTC
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The PCM diagnoses the requested torque PWM signal circuit and sends a class 2 serial data message to the EBCM indicating a fault is present. A fault exists in the circuit if the PCM detects one of the following conditions:
- The requested torque PWM signal is less than 5 percent duty cycle or greater than 95 percent duty cycle.
- The requested torque PWM signal is not present for 10 seconds.