Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Confirmation Driving Pattern For Readiness Monitor
PURPOSE (see READINESS MONITOR DRIVE PATTERN )
HINT:
Performing this confirmation pattern will activate the front catalyst monitoring by the ECM. This is very useful for verifying the completion of a repair.
- Clear the DTCs.
- Disconnect the battery terminal or remove the EFI and ETCS fuses for 60 seconds or more.
- Connect the hand held tester to the DLC3.
- Enter the following menus: DIAGNOSIS/CARB OBD II/READINESS TESTS and check that CAT EVAL is INCMPL (incomplete).
- Drive the vehicle according to the confirmation driving pattern. Note the state of the Readiness Tests. They will change to COMPL (complete) as the CAT evaluation monitors operate.
- Enter the following menus: DIAGNOSIS/ENHANCED OBD II/DTC INFO/PENDING CODES and check if any DTC (any pending code) is set.
If the READINESS CODE of "CAT EVAL" was "INCMPL" and any DTC (include pending codes) was not set, extend the driving time.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.