Diagnostics Operations Generic OBD II Operations
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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.
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 4.6.4 Live Data on page 38
for detailed information.
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). For O2 Sensor Monitor
tests results of CAN-equipped vehicles, refer to On-Board Monitor.
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.
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.
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