Modern day automobiles manufactured in 1996 or after are controlled by on-board computer systems referred to as the emissions control unit (ECU). Data access to these computer systems have a standard access port named OBDII. Whenever the on-board ECU picks up a fault with the vehicle’s operating situation, information about the problem can be read from the OBDII data port employing a diagnostic scan tool. Once the problem is found, a trained service technician can rapidly fix the vehicle.

But, these repairs typically cause the emissions control system computer’s memory to be cleared. When the ECU’s memory is cleared, the vehicle must complete a drive cycle to allow the ECU time to perform a series of internal tests to ensure that the repairs were effective. As the vehicle is going through this testing drive cycle, the computer’s diagnostic status is know as “Not Ready” because the ECU is waiting for all readiness monitors to become ready. This drive cycle hold up causes a big difficulty because a vehicle in the Not Ready state will not be eligible for any state dictated emissions check. The time span that a vehicle is in the Not Ready state varies by a wide margin and is not very predictable. This leads to much lost time and irritation to both the motorist and the repair technician.

To get the vehicle prepared for the state mandated emissions testing, the repair technician must operate the vehicle on city streets to get through the drive cycle. This is not cost effective since the repair technician’s valuable time could better be allocated repairing other vehicles in the shop. If instead the motorist is instructed to drive the vehicle around to get the monitors ready, the motorist would have no notion when the Not Ready drive cycle has completed. Either the motorist would come back to the shop too early with monitors still not ready or continue driving around unnecessarily far after the vehicle became ready for emissions testing. This guessing game is a awful scenario that could damage the customer’s happiness with the repair shop’s service.

Fortunately, there is an easy solution to the Not Ready drive cycle dilemma. A rather easy device known as the Ready or Not Test Tool can effortlessly show either the repair technician or motorist when the vehicle is ready for emissions testing. The repair shop can install the device on the OBDII diagnostic port and request the motorist to drive the vehicle around. The Ready or Not device has easy to read indicator lights in addition to an audible announcement that will tell the motorist when the vehicle is all set to be returned to the shop for emissions testing.

In addition to the drive cycle readiness indication use, the Ready or Not Scan Tool can also be used by the repair technician as a diagnostic scan tool with the included cable and PC software. No repair shop should do without at least a couple of these helpful devices.

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