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General Smog Check

What is the Drive Cycle for a 2004 Acura TL?

I went to get the emissions tested for my Acura TL and they told me that the readiness indicators were not reset and ready. They told me I needed to do a drive cycle to get the monitors to register everything as good. I don't know what a complete drive cycle is for this car. I know the drive cycle varies to some extent between different vehicles. I know it can be rather detailed with prerequisite conditions, duration, and other specifics.


How to Complete an Acura TL Drive Cycle

In most cases, your vehicle's emission monitors should run during normal driving on both city and highway traffic conditions and over the course of 200 to 300 miles. However, due to different driving habits, the criteria required to run a monitor may not always be met. Following the Acura TL drive cycle below should allow the emission monitors to complete. The drive cycle must be followed accurately.

Performing the driving pattern below will allow your Acura TL to make ready all I/M emission monitors in preparation for a smog inspection. Follow the drive cycle carefully. Take extra caution when performing the drive cycle on public roadways. If you feel you will be unable to follow the Acura TL drive cycle safely, please seek assistance from an smog check repair station or Acura dealership. They may be able to perform the drive cycle utilizing a dynamometer, and specialized scan tools. Prior to beginning the drive cycle ensure your vehicle has between 15% to 85% fuel in the gas tank, and that the engine is cold. It is best to start the driving cycle in the morning (after a cold soak).

OBD-II Monitor Drive Cycle - This drive trace is intended to make READY all the emission monitors listed below in one driving trace.

Pre-Conditioning Requirements

1. MIL (malfunction indicator lamp) must be off

2. Cold start (Best to start in the morning after the vehicle has sat overnight)

3. 1/4 to 3/4 fuel in gas tank. Ensure your Acura is not running empty or full of fuel.

Driving Procedure

1. Without depressing the accelerator pedal, start the engine and idle for 20 seconds.

2. Keep the transmission in Park. Increase the engine speed to 2,000 rpm and hold until engine temperature gauge rises to 1/4 of the scale. Approximately 3 minutes of idle time should accomplish this.

3. Begin driving. Increase speed to 50-60 mph as soon as safe and possible and maintain speed for at least 20 minutes. This step should be performed on the highway and with the transmission in Drive. Cruise control should not be enabled at any time.

4. Drive an additional 90 seconds without moving the accelerator pedal at all. Your vehicle speed may vary slightly, but no greater than 3 mph. If it is not possible to maintain steady speed for 90 seconds, drive for at least 30 seconds, then repeat 30 second steady speedy intervals, twice (for a total of 90 seconds). The goal is, at some point of highway driving, to not move the accelerator pedal for 90 seconds.

5. Exit highway and reduce speed to city/suburban traffic. Drive for at least 10 minutes.

6. When possible, allow vehicle to coast for 10 seconds without depressing the accelerator or brake pedal.

Drive Cycle Complete. If possible perform the drive cycle twice and using a scan tool check for emission monitor readiness.

posted by SmogTips Support

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