GN3433EN V7.fm Page 41 Tuesday, June 19, 2007 9:50 AM
DTC Test The TCM performs a series of “diagnostic tests” to determine if a failure has occurred. Diagnostic Tests are performed when specific transmission operating conditions occur. The DTC Test Screen displays all application-supported DTCs and indicates the failure status of the Diagnostic Test since clear code, and since powerup. The following table describes each state: DTC Test Columns Possible Values Description Since Clear Code Test Failed/Not Indicates that the Diagnostic Test related to Performed the DTC has failed at least once since the DTCs were cleared, or the Diagnostic Test hasn’t been performed by the TCM *. Test Passed Sometime after the last clear code event the TCM ran the Diagnostic Test with no fault found. Since Power Up Test Failed/Not Indicates that the Diagnostic Test related to Performed the DTC has failed within this ignition cycle, or the Diagnostic Test hasn’t been performed by the TCM *. Test Passed The TCM ran the Diagnostic Test with no fault found. * For example, the transmission hasn’t reached the necessary operating conditions to run the Diagnostic Test yet.
The DTC Test screen allows the technician to determine the status of a DTC test. For example, after fixing the problem causing a DTC, the technician must know the status of a DTC test in order to make sure that the failure condition was effectively corrected.
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