Diagnostic Test Mode II (Self-Diagnostic Results)
In this mode, DTCs and 1st trip DTCs are indicated by the number of MIL flashes. DTCs and 1st trip DTCs are displayed at the same time. If MIL does not illuminate when engine is running in diagnostic test mode I, all displayed items are 1st trip DTCs. If MIL is illuminated when engine is running in diagnostic test mode I, and only one DTC is indicated, it is a DTC. If 2 or more DTCs are indicated, they may be either DTCs or 1st trip DTCs.
A particular DTC can be identified by the number of 4-digit numeral flashes. The zero is indicated by 10 flashes. The length of time the 1000th-digit numeral flashes on and off is 1.2 seconds, consisting of an ON (0.6-second)-OFF (0.6-second) cycle. The 100th-digit numeral and lower digit numerals consist of a 0.3-second ON and 0.3-second OFF cycle. A change from one digit numeral to another occurs at an interval of 1.0-second OFF. In other words, the later numeral appears on the display 1.3 seconds after the former numeral has disappeared. A change from one trouble code to another occurs at an interval of 1.8-second OFF. In this way, all the detected malfunctions are classified by their DTC numbers. See Fig 1.