Ready Test; General Information; Test Tool Application - Sealey VS8801 Manual

5. Ready Test

This function can be used as a convenient readiness test tool by
automotive technicians to determine if the tested vehicle is
ready for an emission test. By visual and audible indication,
you will learn a vehicle's monitors readiness.

5.1 General Information

Repairs to the emissions-control systems of a 1996 or newer vehicle
cause the vehicle‟s computer (ECU) memory to be cleared. The
vehicle must go through a drive cycle to allow the ECU to perform a
series of tests to ensure that the repair was successful, and before a
state mandated emissions test can be conducted. But how will you
know when it is ready?
With this code reader, you don‟t have to drive around endlessly and
continuously coming back to the repair shop for retest if all required
tests by the ECU are completed. And you could also do a quick check
of the vehicle to determine if it is ready to receive an emission test
without the hassle of connecting your vehicle to the analyzer or
having to use a complicated scan tool.
In the following cases, this function is especially useful.

You bought a used car and the check engine light had been
cleared to mask potential problems.

You used a code reader to clear the DTCs.

Your car has been sent to repair.

5.2 Test tool application

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