Diagnostic Trouble Codes (DTC'S)

Sensing and Diagnostic Module (SDM) provides a record of Diagnostic Trouble Codes (DTC's), stored according to type. SDM performs diagnostic monitoring of SIR system electrical components and sets a DTC when a malfunction is detected. Current and history DTC's are stored in SDM and are accessed using a scan tool, such as Tech 2. Current DTC's are erased when fault is corrected using scan tool. History DTC's are erased following a preset number of ignition cycles.