OBD - System Operational Charts
OBD System Operation Chart:
RELATIONSHIP BETWEEN MIL, DTC, CONSULT and DRIVING PATTERNS
*1: When the same malfunction is detected twice, MIL will automatically light up.
*2: MIL will go off automatically after 3 drivings (pattern B: except for "Misfire", "Fuel Injection System", pattern C: for "Misfire", "Fuel Injection System") without any malfunctions.
*3: When a malfunction is detected for the first time, the DTC and the freeze frame data will be stored in ECM.
*4:
(The DTC and the freeze frame data still remain in ECM.)
*5 Other screen except DATA MONITOR (AUTO TRIG) cannot display the malfunction.
*6: DATA MONITOR (AUTO TRIG) can display the malfunction at the moment it is detected.
*7: The malfunction can not be displayed because the timing to set DATA MONITOR (AUTO TRIG) screen was missed against the NG detection.
*8:
(The DTC and the freeze frame data still remain in ECM.)
Explanation For Driving Patterns Chart:
EXPLANATION OF DRIVING PATTERNS
Driving Pattern A (Except for "Misfire", "Fuel Injection System")
^ The A counter will be counted up when (1) - (4) are satisfied without the malfunction.
^ The A counter will be cleared when the malfunction is detected regardless of (1) - (4).
^ The DTC will not be displayed any longer after the A counter becomes 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 counted up when the driving pattern B is satisfied without the malfunction.
^ The B counter will be cleared when the malfunction is detected twice regardless of the driving pattern.
^ The MIL will go off when the B counter becomes 3. (Except for "Misfire", "Fuel Injection System".)
^ The DTC will not be displayed any longer after the B counter becomes 80. (For "Misfire", "Fuel Injection System".)
Driving pattern C (For "Misfire", "Fuel Injection System".)
Driving Pattern C means the vehicle operation as follows:
(1) Driving pattern A should be satisfied.
(2) The following condition should be satisfied:
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: T > or = 70°C (158°F), T < 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 > or = 70°C (158°F)
^ The C counter will be counted up when (1), (2) are satisfied without the malfunction.
^ The C counter will be cleared when the malfunction is detected regardless of (1), (2).
^ The MIL will go off when the C counter becomes 3.