DTC (Diagnostic Trouble Codes): Notes

The self-diagnostic function of the SRS system allows it to locate the causes of system problems and store this information in memory. For easier troubleshooting, this data can be retrieved with the HDS via the data link circuit.

• When you turn the ignition switch to ON (II), the SRS indicator comes on. If it goes off after 6 seconds, the system is normal with no problems detected.
• If a problem is detected, the system locates and defines the problem, stores this information in memory, and turns on the SRS indicator on. The data remains in memory even if the ignition switch is turned to LOCK (0) or the battery is disconnected.
• The data is stored in memory as a diagnostic trouble code (DTC).
• SRS DTCs are either latching or resetting depending upon the malfunction. Latching DTCs cause the SRS system to light the SRS indicator until the problem is corrected and the DTCs are cleared. Resetting DTCs cause the SRS system to light the SRS indicator until the ignition switch is turned off. If the malfunction does not occur when the ignition switch is subsequently turned to ON (II), the SRS system turns off the SRS indicator, although the DTCs are still stored until cleared.
• When you connect the HDS to the data link connector (DLC), you can retrieve a more detailed DTC in the HDS "SRS" menu.
• After reading and recording the DTC, proceed with the troubleshooting procedure for that code.