Equus 3110 - CanOBD2 Diagnostic Tool - Manual (Page 49)

CAN OBD2 47
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Using the Code Reader
I/M READINESS TESTING
On some vehicle models, the computer will store non-
emission related DTCs. These DTCs will not command the
MIL on since they are not emission related. If the Code
Reader retrieves one of these types of codes, the MIL will not
be commanded on, and the Yellow LED on the Code Reader
will be iluminated. In most cases, these types of codes will
not prevent the Emissions Test from being performed.
Using the I/M Readiness Monitor Status to Confirm a Repair
The I/M Readiness Monitor Status function can be used (after repair of
a fault has been performed) to confirm that the repair has been per-
formed correctly, and/or to check for Monitor Run Status. Use the fol-
lowing procedure to determine I/M Readiness Monitor Status:
1. Using retrieved Diagnostic Trouble Codes (DTCs) and code defini-
tions as a guide, and following manufacturer's repair procedures,
repair the fault or faults as instructed.
2. After the fault or faults have been repaired, connect the Code
Reader to the vehicle's DLC and erase the code or codes from the
vehicle's computer memory.
■ See page 41 for procedures to erase DTCs from the vehicle's on-
board computer.
■ Write the codes down on a piece of paper for reference before
erasing.
3. After the erase procedure is performed, most of the Monitor icons
on the Code Reader’s LCD display will be flashing. Leave the Code
Reader connected to the vehicle, and perform a Trip Drive Cycle for
each "flashing" Monitor:
Misfire, Fuel and Comprehensive Component Monitors run
continuously and their icons will always be on solid, even
after the erase function is performed.
■ Each DTC is associated with a specific Monitor. Consult the vehi-
cle's service manual to identify the Monitor (or Monitors) associ-
ated with the faults that were repaired. Follow the manufacturer's
procedures to perform a Trip Drive Cycle for the appropriate
Monitors.
■ While observing the Monitor icons on the Code Reader’s LCD
display, perform a Trip Drive Cycle for the appropriate Monitor or
Monitors.