Circuit Description
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
The ESC system calibrations are stored in the EEPROM. When the ignition switch is first turned to the ON position, the ESC module performs internal tests on the EEPROM and can determine the integrity of the EEPROM's non-volatile memory. The ESC module compares the previously stored checksum with the checksum calculated when the ignition switch is first turned ON. If the two checksums do not match, the ESC module will indicate that a calibration malfunction, which is a checksum error is current.