Initialization Sequence
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The EBCM performs one initialization test each ignition cycle. The initialization of the EBCM occurs when the following conditions are met:
- The ignition is ON.
- The bulb check has been completed.
- Vehicle speed is greater than 6 km/h (4 mph).
The initialization sequence briefly cycles each solenoid and the pump motor to verify proper operation of the components. In very cold ambient temperatures, vehicles equipped with JL4 may exhibit noticeable pump noise, and more than one cycle may be performed. The EBCM sets one or more DTCs in accordance with any malfunction that is detected.
The EBCM defines a drive cycle as the completion of the initialization sequence.