Without Scan Tool

Flash DTC diagnostics read the current DTCs, and determine the present history DTCs. You can enable flash DTC diagnostics by jumping the terminals of the Air Bag Diagnostic Connector with the ignition switch set to the ON position. This action pulls the SDM terminal 12 to ground and signals the SDM to enter the flash DTC diagnostic display mode. The SDM displays the DTCs by flashing the AIR BAG warning lamp. The number of times that the warning lamp flashes indicates the numerals of the DTC code.
1. Count the number of flashes that occur in the first series of flashes. This number is the first digit of the DTC code.
2. The lamp will pause for a half of a second.
3. Count the number of flashes that occur in the second series of flashes. This number is the second digit of the DTC code.

Each DTC is flashed once before moving on to the next DTC. After the tool displays all DTCs, the entire DTC sequence is repeated until you remove the jumper from the Air Bag Diagnostic Connector.

Two special DTCs exist, DTC 12 and DTC 13. DTC 12 is always the first DTC that is displayed when the flash DTC mode is enabled. DTC 12 is not an SIR fault indication. DTC 12 is an indication that the flash DTC mode is enabled. When current DTCs or history DTCs are not present, the SDM displays DTC 12 until you remove the jumper from the Air Bag Diagnostic Connector. Flash DTC 13 displays only if noncurrent history DTCs are present. Use a scan tool for reading history DTCs.