Using On-Board Diagnostics

WARNING: This page is about a different car, the 1999 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition switch to ON position, with engine off. Press the RESET button of Driver Information Center (DIC) to acknowledge any warning messages present. See Figure . Depress and hold the OPTIONS button. While holding the OPTIONS button, press the FUEL button 4 times within 10 seconds. System will enter into automatic display mode, followed by manual display mode.

During automatic display mode and all modules that communicate on serial data line will be displayed. After each module is displayed, DIC will display the number of current and history DTCs for that system. NO CODES displayed indicates that there are no codes present for that system. NO COMM displayed indicates a communication problem between systems. After all DTCs have been displayed for all systems, DIC will display NO MORE CODES for 2 seconds, then enter into manual display mode.

Manual display mode of DTCs can be entered at any time after entering on-board diagnostics by depressing any button of DIC, except the E/M button. See Figure . Depressing E/M button will exit on-board diagnostics. During manual display mode systems may be selected for viewing by depressing specific buttons of DIC. Depress TRIP button to view previous module. Depress OPTIONS button to view next module. Depress FUEL button to view previous DTC in selected module. Depress GAUGES button to view next DTC in selected module. After retrieving and recording current and history DTCs for Seat Control Module (SCM), perform appropriate diagnostic test for DTC set. See DIAGNOSTIC TROUBLE CODES (DTCS) table.