Nissan Versa
Sedan Service Manual
Transmission & driveline » Transaxle & transmission (TM) » Diagnosis system (TCM)
Diagnosis description : counter system

RELATION BETWEEN DTC AT 1ST TRIP/DTC/MIL AND DRIVING CONDITIONS (FOR 2 TRIP DETECTION DIAGNOSIS THAT ILLUMINATES MIL)

When initial malfunction is detected, TCM memorizes DTC of the 1st trip. MIL does not light at this stage.
If the same malfunction is detected at the 2nd trip, TCM memorizes DTC and MIL lights at the same time.
Then, MIL goes after driving the vehicle for 3 trips under "Driving condition B" without malfunction.
DTC is displayed until 40 trips of "Driving condition A" are satisfied without detecting the same malfunction.

DTC is erased when 40 trips are satisfied.
.When the self-diagnosis result is acceptable at the 2nd trip (conforming to driving condition B), DTC of the 1st trip is erased.

COUNTER SYSTEM LIST

DRIVING CONDITION

Driving condition A

Driving condition A is the driving condition that provides warm-up.

In specific, count-up is performed when all of the following conditions are satisfied.

Engine speed is 400 rpm or more.
After start of the engine, the water temperature increased by 20 C (36 F) or more.
Water temperature was 70 C (158 F) or more.
The ignition switch was changed from ON to OFF.

NOTE:

If the same malfunction is detected regardless of the driving condition, reset the A counter.
When the above is satisfied without detecting the same malfunction, count up the A counter.
When MIL goes off due to the malfunction and the A counter reaches 40, the DTC is erased.

Driving condition B

Driving condition B is the driving condition that performs all diagnoses once.

In specific, count-up is performed when all of the following conditions are satisfied.

Engine speed is 400 rpm or more.
Water temperature was 70 C (158 F) or more.
In closed loop control, vehicle speed of 70 - 120 km/h (43 - 75 MPH) continued for 60 seconds or more.
In closed loop control, vehicle speed of 30 - 60 km/h (19 - 37 MPH) continued for 10 seconds or more.
In closed loop control, vehicle speed of 4 km/h (2 MPH) or less and idle determination ON continued for 12 seconds or more.
After start of the engine, 22 minutes or more have passed.
The condition that the vehicle speed is 10km/h (6 MPH) or more continued for 10 seconds or more in total.
The ignition switch was changed from ON to OFF.

NOTE:

If the same malfunction is detected regardless of the driving condition, reset the B counter.
When the above is satisfied without detecting the same malfunction, count up the B counter.
When the B counter reaches 3 without malfunction, MIL goes off.
When the B counter is counted once without detecting the same malfunction after TCM memorizes DTC of the 1st trip, DTC of the 1st trip is erased.

TIME CHART

More about «Diagnosis system (TCM)»:

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