DTC Test Descriptions

The self-diagnostic tests run to determine if a subsystem has passed or failed a specified test. After a test is performed, the ECM will record test PASS/FAIL criteria for display with a Scan tool. Each DTC will have four records as follows:

^ TEST PASSED THIS IGNITION - Indicates whether a diagnostic test has reported a test passed this ignition cycle.

^ TEST FAILED THIS IGNITION CYCLE -Indicates diagnostic was performed this ignition cycle and a fault was detected. This results in a failed test.

^ TEST PASSED SINCE CODE CLEAR - Indicates a diagnostic test passed since the last time DTCs were cleared or the battery was disconnected.

^ TEST FAILED SINCE CODE CLEAR - Indicates a diagnostic test has reported a fault since the last time DTCs were cleared or the battery was disconnected.