Confirmation Readiness Test
WARNING: This page is about a different car, the 2003 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
- Be sure vehicle is cold and ambient temperature is 50-95°F (10-35°C). Intake Air Temperature (IAT) and Engine Coolant Temperature (ECT) sensors should have almost the same value.
- Disconnect battery terminal or remove EFI and ETCS fuses. Readiness test will show ICMPL (incomplete). See Fig 1.
- Drive vehicle according to LA#4 driving cycle. Note state of Readiness Tests. They will change to COMPL as EVAP evaluation monitors operate and if system passes. This procedure may take 20 minutes or more. Do NOT shut off engine. Results will be invalid.
- If EVAP evaluation monitor shows COMPL, go to Non-Continuous Test screen. See Fig 2. To get there, go to Advanced OBD II, Onboard Tests, Non-Continuous Tests.
- If all tests in time $02 category tests show Pass, EVAP evaluation monitor has operated and no problem was detected. See Fig 3.
- If EVAP evaluation monitor shows INCMPL, go to Non-Continuous Test Screen. See Fig 4.
- If all tests show Pass, EVAP evaluation monitor did not operate, did not finish or withheld judgement.
- If one or more tests in time $02 category show Fail, EVAP evaluation monitor did operate and ECM detected a problem.
- Go to Continuous Tests screen. This is only place DTCs are listed for first trip. See Fig 5. DTC listed may not be valid. A second trip is needed to confirm DTC.
- Let vehicle cool to conditions in step 1.
- Go to Readiness Tests screen. Drive vehicle according to LA#4 drive cycle. Note state of EVAP evaluation monitor. See Fig 4. This procedure may take 20 minutes or more. Do NOT shut off engine. Results will be invalid.
- If Readiness Tests changes to COMPL, EVAP evaluation monitor has operated. Check for any stored DTCs. See Fig 5. If a DTC has stored, problem has been detected and confirmed by ECM. If no DTC was found, EVAP monitor operated but no problem was detected.