Counter System

DIAGNOSIS SYSTEM (TCM)

DIAGNOSIS DESCRIPTION : Counter System


RELATION BETWEEN DTC AT 1ST TRIP/DTC/MI 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 Pattern B" without malfunction.
- DTC is displayed until 40 trips of "Driving Pattern 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 pattern B), DTC of the 1st trip is erased.

COUNTER SYSTEM LIST







DRIVING CONDITION

Driving Pattern A
Driving pattern 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 reaches 400 rpm or more.
- Engine coolant temperature rises by 20�C (36�F) or more after starting the engine.
- Engine coolant temperature reaches 70�C (158�F) or more.
- The ignition switch is turned 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 Pattern B
Driving pattern 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 reaches 400 rpm or more.
- Engine coolant temperature reaches 70�C (158�F) or more.
- Vehicle speed of 70 - 120 km/h (44 - 75 MPH) is maintained for 60 seconds or more under the control of closed loop.
- Vehicle speed of 30 - 60 km/h (19 - 37 MPH) is maintained for 10 seconds or more under the control of closed loop.
- Under the closed loop control condition, the following state reaches 12 seconds or more in total: Vehicle speed of 4 km/h (2 MPH) or less with idling condition.
- A lapse of 22 minutes or more after engine start.
- The state of driving at 10km/h (6 MPH) or more reaches 10 minutes 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