Equus 3130 - Scan Tool – OBD2 - Manual (Page 35)

OBD2 33
E
■ Repair the vehicle yourself. If you are going to perform the
repairs yourself, proceed by reading the vehicle service manual
and following all its procedures and recommendations.
■ Take the vehicle to a professional to have it serviced. The prob-
lem(s) causing the red LED to light must be repaired before the
vehicle is ready for an Emissions Test (Smog Check).
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 Scan Tool
to the vehicle's DLC and erase the code or codes from the vehicle's
computer memory.
■ See page 27 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 Scan Tool’s display will be flashing. Leave the Scan Tool con-
nected to the vehicle, and perform a Trip Drive Cycle for each "flash-
ing" 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 Scan Tool’s display,
perform a Trip Drive Cycle for the appropriate Monitor or Monitors.
If the vehicle needs to be driven in order to perform a Trip
Drive Cycle, ALWAYS have a second person help you.
One person should drive the vehicle while the other per-
son observes the Monitor icons on the Scan Tool for
Monitor RUN status. Trying to drive and observe the
Scan Tool at the same time is dangerous, and could
cause a serious traffic accident.
Using the Scan Tool
I/M READINESS TESTING