Nissan Versa
Sedan Service Manual
Transmission & driveline » Transaxle & transmission (TM) » Diagnosis system (TCM)
Diagnosis description : DTC and DTC of 1st Trip

2 TRIP DETECTION DIAGNOSIS THAT ILLUMINATES MIL

The DTC number of the 1st trip is the same as the DTC number.
When a malfunction is detected at the 1st trip, TCM memorizes DTC of the 1st trip. MIL does not light at this stage. If the same malfunction is not detected at the 2nd trip (conforming to necessary driving conditions), DTC at the 1st trip is erased from TCM. If the same malfunction is detected at the 2nd trip, TCM memorizes DTC and MIL lights at the same time.
The DTC of the 1st trip is specified in Service $01 of SAE J1979/ISO 15031-5. Since detection of DTC at the 1st trip does not illuminate MIL, warning for a problem is not given to a driver.
For procedure to delete DTC and 1st trip DTC from TCM, refer to TM "CONSULT Function".
If DTC of the 1st trip is detected, it is necessary to check the cause according to the "Diagnosis flow". Refer to TM "Work Flow".

DIAGNOSIS DESCRIPTION : Malfunction Indicator Lamp (MIL)

TCM not only detects DTC, but also sends the MIL signal to ECM through CAN communication. ECM sends the MIL signal to the combination meter through CAN communication according to the signal, and illuminates MIL.
For malfunction indicator lamp (MIL) description, refer to EC "DIAGNOSIS DESCRIPTION : Malfunction Indicator Lamp (MIL)".

More about «Diagnosis system (TCM)»:

Diagnosis description : 1 Trip detection diagnosis and 2 Trip detection diagnosis