Without Scan Tool

"Flash Code" diagnostics can only be used to read current diagnostic trouble codes and to determine if history diagnostic trouble codes are present. "Flash Code" diagnostics cannot be used to clear diagnostic trouble codes. Grounding terminal "K" of the data link connector with the ignition switch "ON" pulls the "Diagnostic Request" input terminal "A5" of the DERM low and signals the DERM to enter the "Flash Code" diagnostic display mode.

The DERM displays diagnostic trouble codes by flashing the "AIR BAG" warning lamp in the instrument cluster with the "SIR Indicator Low" output terminal "A1." Each diagnostic trouble code displayed consists of a number of flashes which represent the tens or first digit, a 1/2 second pause, then a number of flashes which represent the ones or second digit. Each diagnostic trouble code is flashed once before moving on to the next one and the entire sequence will be repeated until ground is removed from terminal "K" of the data link connector.

Two special diagnostic trouble codes exist when reading in the "Flash Code" mode, DTC 12 and DTC 13. DTC 12 will always be the first diagnostic trouble code displayed when the "Flash Code" mode is enabled. DTC 12 is not an indication of a SIR malfunction, but an indication that the "Flash Code" mode has been enabled. If there are no current or history diagnostic trouble codes present the DERM will continue to flash DTC 12 until ground is removed from the data link connector at terminal "K." DTC 13 will be displayed if there are history DTCs. To read the history diagnostic trouble codes, use of a scan tool is required.