Smog Check Manual - Functional Tests: Q’s And A’s
The malfunction indicator light (MIL) or "Check Engine Light" shall be
checked on all vehicles equipped with... Right Ans - OBD I; OBD II
During the MIL functional test, the MIL should illuminate in this key position.
Right Ans - KOEO
During the MIL functional test, the MIL should extinguish when the key is in
this position. Right Ans - KOER
If the MIL does not illuminate at all during the MIL functional test, what are
the results of the test? Right Ans - Fail
If the MIL illuminates continuously during the MIL functional test, what are
the results of the test? Right Ans - Fail
If the MIL flashes with the engine running during the MIL functional test, what
are the results of the test? Right Ans - Fail
For vehicles with keyless ignition systems, how should the MIL functional test
be completed? Right Ans - Using the vehicle manufacturer's procedure to
complete the KOEO/KOER sequences
Are maintenance reminder lights part of the Smog Check inspection? Right
Ans - No
Most vehicles with a GVWR greater than this are not equipped with an OBD II
system. Right Ans - 14,000 lbs
How should an inspector proceed with the OBD II functional test if a vehicle is
not equipped with an OBD II system? Right Ans - The OBD II functional test
is not performed on these vehicles
This test evaluates and reports the status and/or results of the readiness
monitors, system faults, and MIL. Right Ans - OBD II functional test
During an OBD II functional test, when should the inspector connect the DLC
to the vehicle? Right Ans - When prompted by the EIS or OIS
, What should the inspector do if they are unable to find the DLC? Right Ans -
Refer to the appropriate electronic component location manual or emission
control diagnostic and repair manual
This condition may constitute a failure of the OBD II functional test: Right
Ans - Problems communicating with the OBD II system
This condition may constitute a failure of the OBD II functional test: Right
Ans - Incompleteness of one or more readiness monitors
This condition may constitute a failure of the OBD II functional test: Right
Ans - The presence of DTCs
This condition may constitute a failure of the OBD II functional test: Right
Ans - MIL command status
This condition may constitute a failure of the OBD II functional test: Right
Ans - The existence of system modifications
This condition may constitute a failure of the OBD II functional test: Right
Ans - Incongruities or problems with vehicle identification
The ignition timing functional test applies to these vehicles: Right Ans -
1976 to 1995 MY equipped with adjustable ignition timing
If the underhood emissions control label, an emissions application guide, or
other reliable manufacturer references indicate that ignition timing is not
adjustable, how should the inspector proceed with the ignition timing
functional test? Right Ans - The test is not required
How should inspectors check base ignition timing? Right Ans - Using the
vehicle manufacturer's proceedures
If procedures to check ignition timing are not specified on the underhood
label, where should the inspector look for the information? Right Ans -
Emission control application guide or an appropriate service manual
The malfunction indicator light (MIL) or "Check Engine Light" shall be
checked on all vehicles equipped with... Right Ans - OBD I; OBD II
During the MIL functional test, the MIL should illuminate in this key position.
Right Ans - KOEO
During the MIL functional test, the MIL should extinguish when the key is in
this position. Right Ans - KOER
If the MIL does not illuminate at all during the MIL functional test, what are
the results of the test? Right Ans - Fail
If the MIL illuminates continuously during the MIL functional test, what are
the results of the test? Right Ans - Fail
If the MIL flashes with the engine running during the MIL functional test, what
are the results of the test? Right Ans - Fail
For vehicles with keyless ignition systems, how should the MIL functional test
be completed? Right Ans - Using the vehicle manufacturer's procedure to
complete the KOEO/KOER sequences
Are maintenance reminder lights part of the Smog Check inspection? Right
Ans - No
Most vehicles with a GVWR greater than this are not equipped with an OBD II
system. Right Ans - 14,000 lbs
How should an inspector proceed with the OBD II functional test if a vehicle is
not equipped with an OBD II system? Right Ans - The OBD II functional test
is not performed on these vehicles
This test evaluates and reports the status and/or results of the readiness
monitors, system faults, and MIL. Right Ans - OBD II functional test
During an OBD II functional test, when should the inspector connect the DLC
to the vehicle? Right Ans - When prompted by the EIS or OIS
, What should the inspector do if they are unable to find the DLC? Right Ans -
Refer to the appropriate electronic component location manual or emission
control diagnostic and repair manual
This condition may constitute a failure of the OBD II functional test: Right
Ans - Problems communicating with the OBD II system
This condition may constitute a failure of the OBD II functional test: Right
Ans - Incompleteness of one or more readiness monitors
This condition may constitute a failure of the OBD II functional test: Right
Ans - The presence of DTCs
This condition may constitute a failure of the OBD II functional test: Right
Ans - MIL command status
This condition may constitute a failure of the OBD II functional test: Right
Ans - The existence of system modifications
This condition may constitute a failure of the OBD II functional test: Right
Ans - Incongruities or problems with vehicle identification
The ignition timing functional test applies to these vehicles: Right Ans -
1976 to 1995 MY equipped with adjustable ignition timing
If the underhood emissions control label, an emissions application guide, or
other reliable manufacturer references indicate that ignition timing is not
adjustable, how should the inspector proceed with the ignition timing
functional test? Right Ans - The test is not required
How should inspectors check base ignition timing? Right Ans - Using the
vehicle manufacturer's proceedures
If procedures to check ignition timing are not specified on the underhood
label, where should the inspector look for the information? Right Ans -
Emission control application guide or an appropriate service manual
