Self-Diagnostic System: Notes

Instrument Panel Cluster (IPC) is equipped with a self-diagnostic system, which detects system Diagnostic Trouble Codes (DTCs) or abnormalities. When a malfunction occurs, IPC will store a DTC. See DIAGNOSTIC TROUBLE CODES  table. Malfunctions are recorded as history/intermittent failures or as current failures. Current DTCs indicate IPC has detected a fault which is currently present. A history DTC indicates that BCM has previously detected a malfunction that is not currently present as it is either an intermittent condition or the system is not being currently operated.

To retrieve DTCs using scan tool, turn ignition switch to ON position. Select appropriate module on scan tool display to retrieve current and history DTCs. Record DTCs and proceed to appropriate DTC and follow diagnostic and repair procedures. To clear DTCs using scan tool, select CLEAR DTCs function on scan tool. Clear current and history DTCs. Operate vehicle and recheck for DTCs.

To retrieve DTCs using instrument cluster Driver's Information Center (DIC), see USING ON-BOARD DIAGNOSTICS under SELF-DIAGNOSTIC SYSTEM in ANALOG INSTRUMENT PANELS - CORVETTE article.