Self-Diagnostic System: Notes

WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For wiring and connector terminal identification, see WIRING DIAGRAMS .

NOTE: When testing procedure indicates to probe or check a terminal, use adapters from Connector Test Adapter Kit (J-35616-A). This will ensure terminal will not be damaged and connection is okay.

Instrument Panel Cluster (IPC) is equipped with an on-board diagnostic display feature which can display and/or clear DTCs. When specific buttons on IPC are pressed, DTCs are displayed on IPC's 20-character Driver Information Center (DIC). See RETRIEVING DIAGNOSTIC TROUBLE CODES (DTCS) .

When diagnostic mode is first entered, IPC will enter an automatic display sequence of all systems that communicate on serial data line. After each system is displayed, DIC will display the number of DTCs (current or history) set in that system. At any time during this automatic display sequence, the manual diagnostic mode may be selected.

In manual diagnostic mode, a specific module can be manually selected for diagnosis by pressing specific buttons on Driver Information Center (DIC). Only DTCs for that particular module will be displayed until another system is requested.

In both diagnostic modes, systems will be displayed in the following order.

Powertrain Control Module (PCM)
Traction Control System (TCS)
Real Time Damping (RTD)
Body Control Module (BCM)
Instrument Panel Cluster (IPC)
Radio
Heater, Ventilation And Air Conditioning (HVAC)
Left Door Control Module (LDCM)
Right Door Control Module (RDCM)
Seat Control Module (SCM)
Remote Function Actuation (RFA)

If a DTC exists in any system, display will indicate whether DTC is current (with a "C") or history (with an "H"). When E/M button on DIC is pressed at any time, IPC will exit diagnostics mode. See Figure. On-board diagnostics will also be exited automatically if no DIC buttons are pressed for 60 seconds.