90
b) Test results reported by this service do not necessarily indicate a faulty
component or system. If test results indicate another failure after additional
driving, then a DTC is set to indicate a faulty component or system and the MIL
is illuminated.
⚫ Freeze Frame
Typically, the stored frame is the last DTC that occurred. Certain DTCs, that have a
greater impact on vehicle emission, have a higher priority. In these cases, the top
prioritized DTC is the one for which the freeze frame records are retained. Freeze
frame data includes a “snapshot” of critical parameter values at the time the DTC is
set.
⚫ 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, and
reset the I/M Readiness Monitor Status for all vehicle monitors to Not Ready or Not
Complete status.
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.
8.5.2.2 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 state emissions compliance. Select
I/M Readiness to display a sub menu with two choices:
⚫ Since DTCs Cleared — displays the status of monitors since the last time the DTCs
are erased.
⚫ This Driving Cycle — displays the status of monitors since the beginning of the
current drive cycle.
8.5.2.3 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 Live Data for detailed information.
To Next Page
Loading...
