DTC Modes

There are 4 options available on OBD II vehicles in the scan tool DTC mode for displaying the enhanced information available. After selecting DTC, the following menu appears:
^ DTC Info
^ Freeze Frame/Failure Records
^ Clear DTC Information
^ Capture Info

The following is a brief description of each of the sub menus in DTC Info and Specific DTC.

DTC Info
When the scan tool displays a DTC, the status of the DTC is also displayed. The following DTC information will be indicated only when it applies to the DTC that is set.

Fail This Ign. (Fail This Ignition): Indicates that this DTC failed during the present ignition cycle.

Last Test Fail: Indicates that this DTC failed the last time the test ran. The last test may have run during a previous ignition cycle if an A or B type DTC is displayed. For type C DTCs, the last failure must have occurred during the current ignition cycle to appear as Last Test Fail.

MIL Request: Indicates that this DTC is currently requesting the Malfunction Indicator Lamp (MIL). This selection will report type B DTCs only when they have requested the MIL (failed twice).

Test Fail SCC (Test Failed Since Code Clear): Indicates that this DTC has reported a failure since the last time the DTCs were cleared.

History: Indicates that the DTC is stored in the Powertrain Control Module (PCM) History memory. Type B DTCs will not appear in History until they have requested the MIL (failed twice). History will be displayed for all type A DTCs and type B DTCs, which have requested the Malfunction Indicator Lamp (MIL), that have failed within the last 40 warm-up cycles. Type C DTCs that have failed within the last 40 warm-up cycles will also appear in History.

Not Run SCC (Not Run Since Code Clear): DTCs will be listed in this category if the diagnostic has not run since DTCs were last cleared. This status is not included with the DTC display since the DTC can not be set if the diagnostic has not run. This information is displayed when DTC Info is requested using the scan tool.

Specific DTC Mode: Used in order to check the status of individual diagnostic tests by DTC number. This selection can be accessed whether a DTC has passed or failed. Many OBD II DTC mode descriptions are possible because of the extensive amount of information that the diagnostic executive monitors regarding each test. This selection only allows the entry of DTC numbers that are supported by the vehicle being tested. If an attempt is made to enter DTC numbers for tests that the diagnostic executive does not recognize, the requested information will not be displayed correctly and the scan tool may display an error message. The same applies to using the DTC trigger option in the Snapshot mode. If an invalid DTC is entered, the scan tool will not trigger.