Flash Code Diagnostics
Flash code diagnostics can be used to read active codes and to determine if history codes are present. Flash code diagnostics cannot be used to clear codes or read history codes. Flash code diagnostics are enabled by grounding terminal No. 4 of DLC connector with ignition on. See Fig 1. SDM displays trouble codes by flashing warning light. Each code displayed consists of a number of flashes which represent tens digit, followed by a 1.2 second pause, followed by a number of flashes which represent ones digit of code. After all codes have been displayed, entire code sequence will continually repeat until ground is disconnected from terminal No. 4 of DLC connector.
Flash code 12 will always be first code displayed. It is not an indication of a problem but an indication that flash code mode has been enabled. If there are no active or history codes present, code 12 will be displayed until ground is disconnected from DLC connector terminal No. 4.
Flash code 13 will be displayed if history codes are present. Scan tool is required to read history codes.
| Trouble Code | Possible Cause |
|---|---|
| 15 | Passenger deployment loop resistance high |
| 16 | Passenger deployment loop resistance low |
| 17 | Passenger deployment loop open |
| 18 | Passenger deployment loop short to ground |
| 19 | Passenger deployment loop short to power |
| 21 | Driver deployment loop resistance high |
| 22 | Driver deployment loop resistance low |
| 24 | Driver deployment loop short to ground |
| 25 | Driver deployment loop short to ignition |
| 26 | Driver deployment loop open |
| 51 | Deployment event commanded |
| 53 | Deployment commanded with deployment loop fault or energy reserves out of range |
| 61 | Warning light circuit failure |
| DTC 71: INTERNAL SDM FAULT | Internal SDM fault |