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a) If a test failed during the driving cycle, the DTC associated with that test is reported. If the pending fault
does not occur again within 40 to 80 warm-up cycles, the fault is automatically cleared from memory.
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.
7.3 Freeze Frame
In most cases the stored frame is the last DTC that occurred. Certain DTCs, those that have a greater impact on
vehicle emission, have a higher priority. In these cases, the highest priority 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.
7.4 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 resets 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 [OK]
on the confirmation screen to continue, or [Cancel] to exit.
7.5 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 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.
7.6 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.
7.7 O2 Sensor Monitor
This option allows retrieval and viewing of O2 sensor monitor test results for the most recently performed tests from the
vehicle’s on-board computer. The O2 Sensor Monitor test function is not supported by vehicles which communicate using
a controller area network (CAN).
7.8 On-Board Monitor
This option allows you to view the results of On-Board Monitor tests. The tests are useful after servicing or after erasing
a vehicle’s control module memory.
7.9 Component Test
This service enables bi-directional control of the ECM so that the diagnostic tool is able to transmit control commands
to operate the vehicle systems. This function is useful in determining how well the ECM responds to a command.
7.10 Vehicle Information
The option displays the vehicle identification number (VIN), the calibration identification, and the calibration verification
number (CVN), and other information of the test vehicle.
7.11 Vehicle Status
This item is used to check the current condition of the vehicle, including communication protocols of OBD II modules,
retrieved codes amount, status of the Malfunction Indicator Light (MIL), and other additional information may be
displayed.
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