Operating On-Board Diagnostics

In automatic display mode, each system module will be displayed on IPC followed by DTCs that exist in that system. If no DTCs exist, IPC will display NO CODES for that system. If DTCs exist, each DTC will be displayed for 3 seconds followed by a one second pause. If IPC cannot communicate with any system, IPC will display NO COMM for that system. At any time during automatic display mode, manual display feature can be activated by pressing any DIC button except E/M (switch 5). When all systems have been checked in automatic mode, IPC will display NO MORE CODES for 2 seconds, and will then enter manual mode.

When manual mode is entered, IPC will display MANUAL DIAGNOSTICS for 2 seconds or until any DIC button except E/M (switch 5) is pressed. IPC will then display first system and number of DTCs set in that system, and wait for further instructions. Using DIC buttons, move through system diagnostics as necessary. See DIC BUTTON DIAGNOSTIC FUNCTIONS  table.

When E/M button (switch 5) on DIC is pressed at any time, IPC will exit diagnostics mode. On-board diagnostics will also be exited automatically if no DIC buttons are pressed for longer than 60 seconds.