DTC And 1ST Trip DTC

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

The following shows 2nd trip detection diagnosis that illuminates the MIL.

The 1st trip DTC number is the same as the DTC number.

If a malfunction is detected during the 1st trip, the 1st trip DTC is saved in the Li-ion battery controller (LBC) memory. At this time, the MIL does not illuminate. Some of the diagnoses illuminate the hybrid system warning lamp and other diagnoses do not illuminate them.

If the same malfunction is not detected in the 2nd trip (meeting the required driving pattern), the 1st trip DTC is cleared from the LBC memory. If the same malfunction is detected in the 2nd trip, both the 1st trip DTC and DTC are saved in the LBC memory and the MIL, the hybrid system warning lamp illuminate.

The procedure for erasing the DTC and the 1st trip DTC from LBC memory is described in "How to Erase DTC and 1st Trip DTC" in CONSULT FUNCTION .

Refer to DTC INDEX for the malfunctions for which the 1st trip DTC is displayed.

1st trip DTC is specified in Service $07 of SAE J1979/ISO 15031-5.

When a 1st trip DTC is detected, check, print out or write down and erase (1st trip) DTC and Freeze Frame data as specified in Work Flow procedure Step 2, refer to WORK FLOW .

Then perform DTC Confirmation Procedure or Component Function Check to try to duplicate the malfunction. If the malfunction is duplicated, the item requires repair.