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Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » Diagnosis description
Diagnosis description : 1st trip detection logic and two trip detection logic

When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in the ECM memory. The MIL will not illuminate at this stage. <1st trip> If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored in the ECM memory, and the MIL illuminates. The MIL illuminates at the same time when the DTC is stored.

<2nd trip> The "trip" in the "Two Trip Detection Logic" means a driving mode in which selfdiagnosis is performed during vehicle operation. Specific on board diagnostic items will cause the ECM to illuminate or blink the MIL, and store DTC and Freeze Frame data, even in the 1st trip, as shown below.

                                                                                                                ×: Applicable -: Not applicable

Items MIL DTC 1st trip DTC
1st trip 2nd trip 1st trip displaying 2nd trip displaying 1st trip displaying 2nd trip displaying
Blinking Illuminated Blinking Illuminated
Misfire (Possible three way catalyst damage) - DTC: P0300 - P0308 is being detected x x
Misfire (Possible three way catalyst damage) - DTC: P0300 - P0308 is being detected x x  
One trip detection diagnoses x x
Except above x x x
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    Nissan Versa Sedan Service Manual / Engine / Engine control system (EC) / Diagnosis description / Diagnosis description : 1st trip detection logic and two trip detection logic

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