Past Diagnostic Test Mode
Past Diagnostic Test ModeWhen the A/C switch is pressed with the system in present diagnostic test mode, the A/C amplifier changes the on-board diagnostic function to past diagnostic test mode. In this mode, any past failures, such as disconnections or short circuits, detected and memorized by the A/C amplifier are indicated on the SST (Control Unit) as diagnostic trouble codes. If a diagnostic trouble code is indicated, refer to the following diagnostic trouble code table and inspect the appropriate system. (Disconnections and short circuits are memorized even if they occur only once.) If the A/C switch is pressed again while in past diagnostic test mode, the on-board diagnostic function will return to present diagnostic test mode.
NOTE: Only when "(Past)" appears on the display, the A/C amplifier is in the past diagnostic test mode, otherwise the A/C amplifier is in the present diagnostic test mode.