Monitors, Trips, Drive Cycles and Readiness Codes

CONFIRMATION DRIVING PATTERN
1. Connect the TOYOTA hand-held tester to the DLC3.
2. Switch the TOYOTA hand-held tester from normal mode to check mode.
3. Start the engine and warm it up with all accessory switches OFF.
4. Drive the vehicle at 50-65 kph (31-40 mph) for 1-3 min. to warm up the heated oxygen sensor.
5. Let the engine idle for 1 min.
6. Perform steps (3) to (5) three times.

HINT: If a malfunction exists, the MIL will light up during step (6).

NOTE: If the conditions in this test are not strictly followed, detection of the malfunction will not be possible
If you do not have a TOYOTA hand-held tester, turn the ignition switch OFF after performing step (3) to (6), then perform steps (3) to (6) again.


SYSTEM CHECK DRIVING PATTERN
1. Connect the OBD II scan tool or TOYOTA hand-held tester to the DLC3.
2. Start and warm up the engine with all accessories switched OFF.
3. Run the vehicle at 70 90 kph (43-56 mph) for 3 min. or more.
4. Idle the engine for about 2 min.
5. Do steps (3) and (4) again.
6. Stop at safe place and turn the ignition switch off.
7. Do steps (2) to (5) again.
8. Check the READINESS TESTS mode on the OBD II scan tool or TOYOTA hand-held tester.
If COMPL is displayed and the MIL does not light up, the system is normal.
If INCMPL is displayed and the MIL does not light up, run the vehicle steps (2) to (6) for some times and check it.

HINT: INCMPL is displayed when either condition (a) or (b) exists.
a. The system check is incomplete.
b. There is a malfunction in the system.
If there is a malfunction in the system, the MIL will light up after step (7) above is done. (2 trip detection logic)






CONFIRMATION ENGINE RACING PATTERN
a. Connect the TOYOTA hand-held tester to the DLC3, or connect the probe of the oscilloscope between terminals OX1, OXS and E1 of the ECM connector.
b. Start engine and warm it up with all the accessories switched OFF until water temp. is stable.
c. Race the engine at 2,500-3,000 rpm for about 3 min.
d. After confirming that the waveform of the heated oxygen sensor, bank 1 sensor 1 (OX1), oscillate around 0.5 V during feedback to the ECM, check the waveform of the heated oxygen sensor, bank 1 sensor 2 (OXS).






HINT: If there is a malfunction in the system, the waveform of the heated oxygen sensor, bank 1 sensor 2 (OXS), is almost the same as that of the heated oxygen sensor, bank 1 sensor 1 (OX1), on the left.
There are some cases where, even though a malfunction exists, the MIL may either light up or not light up.