Monitors, Trips, Drive Cycles and Readiness Codes

OBD System Operation Chart

Relationship Between MIL and Detectable Items
- When a malfunction is detected for the first time, DTC is stored in the hybrid vehicle control ECU memory.
- When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are stored in the hybrid vehicle control ECU memory for some DTCs.
- The MIL will go off after the vehicle is driven 3 times (driving pattern B) with no malfunction. The drive is counted only when the recorded driving pattern is met (as stored in the hybrid vehicle control ECU). If another malfunction occurs while counting, the counter will reset.
- The DTC and the freeze frame data will be stored until the vehicle is driven 40 times (driving pattern A) without the same malfunction recurring.

Summary Chart






Driving Pattern A






- The A counter will be cleared when the malfunction is detected regardless of (1) - (3).
- The A counter will be counted up when (1) - (3) are satisfied without the same malfunction.
- The DTC will not be displayed after the A counter reaches 40.

Driving Pattern B
Driving pattern B means the vehicle operation as follows:
All components and systems should be monitored at least once by the OBD system.
- The B counter will be cleared when the malfunction is detected once 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.