Conditions for Running the DTC

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

The ignition is ON.
The precharge pump is activated during a VSES or TCS event or when the EBCM performs the power-up self-test. Refer to ABS DESCRIPTION AND OPERATION (W/O JL4) or ABS DESCRIPTION AND OPERATION (W/JL4) for a complete description of the power-up self-test.