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

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OBD2 & 1

OBD2 Systems

I/M READINESS TESTING

Some areas require that all Monitors indicate a "Has Run" sta-
tus before they allow an Emissions Test (Smog Check) to be
performed. Other areas only require that some, but not all,
Monitors have run their self-diagnostic testing before an
Emissions Test (Smog Check) may be performed.

From the code retrieval procedure, determine the status of
each Monitor (a solid Monitor icon shows Monitor "Has Run"
status, a flashing Monitor icon indicates "Has Not Run" sta-
tus). Take this information to an emissions professional to
determine (based on your test results) if your vehicle is ready
for an Emissions Test (Smog Check).

3. RED LED - Indicates there is a problem

with one or more of the vehicle's sys-
tems. A vehicle displaying a red LED is
definitely not ready for an Emissions
Test (Smog Check). The red LED is also
an indication that there are Diagnostic
Trouble Code(s) present (displayed on
the Tool's screen). The Multifunction
Indicator (Check Engine) Lamp on the
vehicle's instrument panel will light steady. The problem that is
causing the red LED to light must be repaired before an Emissions
Test (Smog Check) can be performed. It is also suggested that the
vehicle be inspected/repaired before driving the vehicle further.

If the Red LED was obtained, there is a definite problem present in
the system(s). In these cases, you have the following options.

■

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 Tool to the

vehicle's DLC and erase the code or codes from the vehicle's com-
puter memory.