Description of Drive Cycles

Relationship Between MIL, DTC and Detectable Items

Summary Chart - Clearing Detected Items:

- When a malfunction is detected for the first time, the DTC and the Freeze Frame Data are stored in the PCM memory.
- When the same malfunction is detected in two consecutive trips, the MIL will come on.
- The MIL will go off after the vehicle is driven three times with no malfunction. The drive is counted only when the recorded driving pattern is met (as stored in the PCM). If another malfunction occurs while counting, the counter will reset. The MIL will remain on until the vehicle is driven (in the recorded driving pattern) three times with no malfunction.
- The DTC and the Freeze Frame Data can be displayed until the vehicle is driven 40 times (except for Misfire and Fuel Injection System). For Misfire and Fuel Injection System, the DTC and freeze frame data can be displayed until the vehicle is driven 80 times.

Misfire and Fuel System Monitor Driving Pattern Information






Driving Pattern For DTC/MIL Setting and Clearing - Misfire and Fuel System Monitor






Driving Pattern A - Misfire and Fuel System Monitors

Driving Pattern B - Misfire and Fuel System Monitors

Pattern B means vehicle operation is as follows:

All components and systems should be monitored at least once by the OBD II system.
- The B counter will reset when the malfunction is detected twice regardless of the driving pattern.
- The B counter will count the number of times driving pattern B is satisfied without the malfunction.
- The DTC will not be displayed after the B counter reaches 80.

Driving Pattern C - Misfire and Fuel System Monitor

Pattern C means vehicle operation is as follows:
1. Driving pattern A should be satisfied.
2. The following conditions should be satisfied at the same time:
Engine speed: (Engine speed in the Freeze Frame Data) ± 375 rpm
Calculated load value: (Calculated load value in the freeze frame data) x (1 ± 0.1) [%]

Engine coolant temperature (T) condition:
- When the freeze frame data shows lower than 70°C (158°F), "T" should be lower than 70°C (158°F).
- When the freeze frame data shows higher than or equal to 700°C (1580° F), "T" should be higher than or equal to 70°C (158°F).

Example:
If the stored freeze frame data is as follows:
- Engine speed: 850 rpm, Calculated load value: 30%, Engine coolant temperature: 80°C (176°F)

To be satisfied with driving pattern C, the vehicle should run under the following conditions:
- Engine speed: 475-1,225 rpm, Calculated load value: 27-33%, Engine coolant temperature: more than 70°C (158°F).
- The C counter will be cleared when the malfunction is detected regardless of (1), or (2) above.
- The C counter will be counted up when (1), (2) are satisfied without the same malfunction.
- The MIL will go off when the C counter reaches 3.

All Monitors Except Misfire and Fuel System Monitor Driving Pattern Information






Driving Pattern For DTC/MIL Setting and Clearing - All Monitors Except Misfire and Fuel System Monitor






Driving Pattern A - All Monitors Misfire and Fuel System Monitors:

- The A counter will be cleared when the malfunction is detected regardless of (1) - (4).
- The A counter will be counted up when (1)- (4) are satisfied without the same malfunction.
- The DTC will not be displayed after the A counter reaches 40.

Driving Pattern B - All Monitors Misfire and Fuel System Monitors:

Driving pattern B means vehicle operation is as follows:

All components and systems should be monitored at least once by the OBD II system.
- The B counter will be cleared when the malfunction is detected twice regardless of the driving pattern.
- The B counter will be counted up when driving pattern B is satisfied without any malfunctions.
- The MIL will go off when the B counter reaches 3.