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Trip Detection Logic

WARNING: This page is about a different car, the 2002 Infiniti QX4, 2001 Nissan Pathfinder, and 2001 Infiniti QX4. However, it is still accessible from the selected car via links, so may be relevant.

One trip detection logic is when a malfunction is detected during the first test drive, the MIL will illuminate and the malfunction will be stored in the ECM memory as a DTC. The TCM is not provided with such a memory function.

Two trip detection logic is when a malfunction is detected during the first test drive, it is stored in the ECM memory as a first trip DTC or first trip freeze frame data. At this point, the MIL will not illuminate. If the same malfunction experienced during the first test drive is sensed during the second test drive, the MIL will illuminate.

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