If you crank or start the engine, you will have to start this test over.
Turn the ignition switch to the “ON” position, but do not crank or start the engine.To check if your vehicle’s OBD II system is ready, you must do the following: The owner’s manual states that the vehicle has a simple ignition key actuated test, which you can use prior to going to the test station. This same procedure may apply to other models and model year Ford/Lincoln/Mercury vehicles. This procedure was included in the Owner’s Manual for a 2012 Ford Focus. If the service engine soon indicator stays on solid, all readiness monitors are complete.If the “Service Engine Soon” light blinks eight times, one or more readiness monitors are incomplete.Turn the ignition key to the “on” position for 15 seconds without cranking the engine.To determine if readiness OBD II monitors are complete: They may not apply to your specific vehicle. However, the following procedures are presented as examples. Consult your owner’s manual for information specific to the car you drive. In most cases, the correct procedure is outlined in your vehicle’s owner’s manual. How to check monitors without a scan tool This is usually accomplished after fifty to one-hundred miles of normal driving. In most cases, a vehicle with incomplete readiness monitors will not pass the California smog inspection (See New Readiness Monitor Standards For OBD II Functional Inspection).ĭriving the vehicle under conditions that meet the monitor enabling criteria should complete most OBD II monitors. If the PCM loses power for any reason (Including a disconnected or depleted battery), or if diagnostic trouble codes are cleared using a diagnostic scan tool, readiness monitors will indicate an incomplete, or not ready, status.
If a fault is detected, the power train control module (PCM – The computer) illuminates the malfunction indicator light (MIL – Check Engine – Service Vehicle Soon). These checks are performed in the background during normal driving and are designed not to interfere with vehicle performance or safety. On 1996 and newer model year vehicles, the on board diagnostic system (OBDII) performs up to eleven diagnostic checks of vehicle emission control systems. This can often be necessary in order to determine if your car is ready for its California smog inspection. It is possible to check OBD II monitor readiness on many late model vehicles without connecting a scan tool.
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