LAUNCH TECH CRT511 User Manual page 28

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2. erase Codes
Note: When this function is used to erase DTCs from the vehicle's on-board
computer, "Freeze Frame" data is erased and "Permanent" DTCs ARE NOT erased.
If you plan to take the vehicle to a Service Center for repair, do noT erase
the codes from the vehicle's computer. If data is erased, valuable information
that might help the technician troubleshoot the problem will also be erased.
After reading the retrieved codes from the vehicle and certain repairs have
been carried out, you can use this function to erase the codes from the
vehicle. Before performing this function, please be sure the vehicle's ignition
key is in the ON position with the engine off.
Select erase Codes from the Diagnostic Menu and press oK, the following
screen will appear:
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Figure 6-8
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Figure 6-9
Press oK to erase DTCs, and the following screen will appear:
Figure 6-10
Follow the on-screen prompts to turn the ignition on with engine off, press oK
to clear the DTCs.
Note: When data is erased from the vehicle's computer memory, the I/M
Readiness Monitor Status program resets the status of all Monitors to a "Not
Completed" status. To set all of the Monitors to a "Completed" status, an OBD
II Drive Cycle must be performed. Refer to your vehicle's service manual for
information on how to perform an OBD II Drive Cycle for the vehicle under test.
After clearing, you should retrieve trouble codes once more or turn ignition on
and retrieve codes again. If there are still some trouble codes in the system,
please troubleshoot the code using a factory diagnosis guide, then clear the
code and recheck.
3. I/M readiness
I/M refers to Inspection and Maintenance that is legislated by the Government
to meet federal clean-air standards. I/M Readiness indicates whether or not
the various emissions-related systems on the vehicle are operating properly
and are ready for Inspection and Maintenance testing.
The purpose of the I/M Readiness Monitor Status is to indicate which of the
vehicle's Monitors have run and completed their diagnosis and testing, and
which ones have not yet run and completed testing and diagnosis of their
designated sections of the vehicle's emissions system.
The I/M Readiness Monitor Status function also can be used (after repair of
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