RELATIONSHIP BETWEEN MIL, 1ST TRIP DTC, DTC, AND DETECTABLE ITEMS (FOR TWO TRIP DETECTION LOGIC THAT MIL TURNS ON)

- TCM stores 1st trip DTC and 1st trip freeze frame data when detecting errors for the first time.
- When detecting the same malfunction during the next travel, TCM stores DTC and the freeze frame data of the 1st trip DTC. The instant when DTC is stored, MIL turns ON.
- MIL turns OFF after driving by 3 trips with no malfunctions. If the same malfunction occurs during counting, the counter is reset.
- DTC and freeze frame data are displayed until after driving by 40 trips with no reoccurrence of the same malfunction.
- If a 2nd trip self-diagnosis result is “OK” (required driving conditions met), the 1st trip DTC is erased.

COUNTER SYSTEM CHART

Items | Driving pattern | Trip
MIL (turns off) | B | 3
DTC, Freeze Frame Data (no display) | A | 40
1st Trip DTC, 1st Trip Freeze Frame Data (clear) | B | 1

DRIVING PATTERN
Driving Pattern A
Driving pattern A means a condition that allows warm-up.
When the following conditions are all satisfied, the counter increases the count.

- Engine speed reaches 400 rpm.
- Engine coolant temperature rises by 20°C (68°F) or more after engine start.
- Engine coolant temperature reaches 70°C (158°F) or more.
- Ignition switch is turned from ON to OFF.

NOTE：

- Counter A is reset when detecting the same malfunction regardless of driving conditions.
- Counter A increases the count when all the above conditions are satisfied without detecting the same malfunction.
- DTC is erased if the count of Counter A reaches 40 and MIL due to applicable malfunction is OFF.

Driving Pattern B
Driving pattern B means a condition that allows all diagnoses at least once.
When the following conditions are all satisfied, the counter increases the count.

- Engine speed reaches 400 rpm.
- Engine coolant temperature reaches 70°C (158°F) or more.
- The state of vehicle speed of 70 – 120 km/h (44 – 75 MPH) continues for 60 seconds under closed loop control.
- The state of vehicle speed of 30 – 60 km/h (19 – 37 MPH) continues for 10 seconds under closed loop control.
- The state of vehicle speed of 4 km/h (2 MPH) or less with idle test ON continues for 12 seconds under closed loop control.
- A 22-minute-lapse after engine start.
- The cumulative time of the state of vehicle speed of 10 km/h (6 MPH) reaches 10 minutes or more.
- Ignition switch is turned from ON to OFF.

NOTE：

- Counter B is reset when detecting malfunctions regardless of driving conditions.
- Counter B increases the count when all the above conditions are satisfied without detecting the same malfunction.
- MIL turns ON when the count of Counter B reaches 3 with no malfunction detection.
- The 1st trip DTC is erased when Counter B has one count with no malfunction detection after the 1st trip DTC is stored in TCM.