VCDS Release 11.11 PDF Manual Printing Instructions: - Ross-Tech

VCDS - View Readiness - Section 11-A
(VAG 1551/1552 function 15)
The Readiness Code is a set of 8 bits, each of which corresponds to one monitored
emissions "system" in an OBD-II car. When all readiness bits show "Passed", it means that
all systems have been checked and have passed the on-board tests. The Readiness
screen shows the name of the script in the title bar and under the [Set Readiness] button,
or gives a reason why [Set Readiness] is disabled when that is the case.
Whenever you clear DTCs, all readiness bits that are testable will be set to "Fail" or "Failed
or Incomplete". Most cars do not have all 8 systems, so the ECU should recognize the bits
corresponding to systems that are not actually in the car. These will come up "Passed"
automatically without going through any tests.
It takes a variety of specific driving conditions to "test" all the systems. In practice, driving a
properly-functioning car for 2-3 days including at least one short highway trip, should be
sufficient to test each of the Readiness Bits to set all of the testable ones to "Passed". It
can be done in a short time using a very specific and complicated procedure found in
the On Board Diagnostic section of the Factory Repair Manual for your engine or you can
use the Guided Readiness Script function in VCDS as described later in this section.