With Manufacturer's Scan Tool
HOW TO READ DIAGNOSTIC TROUBLE CODES1. Turn the ignition switch to the "ON" position while holding the auto-cruise control switch down to the "COAST/SET" position. Then, within one second, more the cruise control switch up to the "ACC/RES" position.
2. Read a diagnostic trouble code by observing the flash display pattern of the "CRUISE" indicator light in the combination meter.
DIAGNOSTIC RESULT DISPLAY METHOD WHEN USING THE "CRUISE" INDICATOR LIGHT
HOW TO ERASE DIAGNOSTIC TROUBLE CODES
NOTE: The diagnostic trouble code will not be erased even if the negative battery terminal is disconnected.
1. Turn the ignition switch to the "ON" position while holding the auto-cruise control switch down to the "COAST/SET" position. Then, within one second, more the cruise control switch up to the "ACC/RES" position.
2. Check to make sure the "CRUISE" indicator light on the instrument panel is flashing.
3. Put the auto-cruise control switch to the "COAST/SET" position. Depress the brake pedal and hold for five seconds or more. Release the brake pedal, auto-cruise control switch, then turn the ignition switch to the "LOCK" (OFF) position. The DTC are now erased.