Obd2 systems – Equus 3120 - OBD 2&1 Tool Kit User Manual

Page 37

OBD2 & 1

OBD2 Systems

I/M READINESS TESTING

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See page 29 for procedures to erase DTCs from the vehicle's on-
board computer.

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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 Tool’s LCD display will be flashing. Leave the Tool 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.

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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.

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While observing the Monitor icons on the Tool’s LCD display, per-
form a Trip Drive Cycle for the appropriate Monitor or Monitors.

WARNING: 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 person observes
the Monitor icons on the Tool for Monitor RUN status. Trying to
drive and observe the Tool at the same time is dangerous, and
could cause a serious traffic accident.

4. When a Monitor's Trip Drive Cycle is performed properly, the

Monitor icon on the Tool’s LCD display changes from "flashing" to
"solid,” indicating that the Monitor has run and finished its diagnos-
tic testing.

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If, after the Monitor has run, the MIL on the vehicle's dash is not
lit, and no stored or pending codes associated with that particu-
lar Monitor are present in the vehicle's computer, the repair was
successful.

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If, after the Monitor has run, the MIL on the vehicle's dash lights
and/or a DTC associated with that Monitor is present in the vehi-
cle's computer, the repair was unsuccessful. Refer to the vehi-
cle's service manual and recheck repair procedures.