iCarsoft CR Genius User Manual page 38

Stored codes are the current emission related DTCs from the ECM of the
vehicle. OBDII/EOBD Codes have a priority according to their emission severity,
with higher priority codes overwriting lower priority codes. The priority of the
code determines the illumination of the MIL and the codes erase procedure.
Manufacturers rank codes differently, so expect to see differences between
makes.
Erase Codes
This option is used to clear all emission related diagnostic data such as,
DTCs, freeze frame data and manufacturer specific enhanced data from the
vehicle's ECM.
A confirmation screen displays when the clear codes option is selected to
prevent accidental loss of data. Select Yes on the confirmation screen to
continue or No to exit.
I/M Readiness
This function is used to check the readiness of the monitoring system. It is
an excellent function to use prior to having a vehicle inspected for compliance to
a state emissions program. Selecting I/M Readiness opens a submenu with two
choices:
 Since Codes Cleared – displays the status of monitors since the last time
the codes are erased.
 This Drive Cycle – displays the status of monitors since the beginning of
the current drive cycle.
Live Data
This function displays the real time PID data from ECU. Displayed data
includes analog inputs and outputs, digital inputs and outputs, and system
status information broadcast on the vehicle data stream.
Live data can be displayed in various modes, see View Data on section 4.5
for detailed information.
Freeze Frame
Figure 4-27 Sample Read Codes Screen
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