Some states have vehicle emission inspection programs which include OBD (On Board Diagnostics) checks. The OBD system monitors the operation of the emission control system.
If the malfunction indicator lamp comes on
The OBD system determines that a problem exists somewhere in the emission control system. Your vehicle may not pass the I/M test and may need to be repaired. Contact your Toyota dealer to service the vehicle.
Your vehicle may not pass the I/M test in the following situations:
Also, depending on your driving habits, the readiness codes may not be completely set.
When the malfunction indicator lamp still remains on after several driving trips
The error code in the OBD system will not be cleared unless the vehicle is driven 40 or more times.
If your vehicle does not pass the I/M test
Contact your Toyota dealer to prepare the vehicle for re-testing.
Replacement
Replace timing chain cover oil seal
Hint:
There are 2 methods to replace the oil seal.
If the timing chain cover is removed from the
cylinder block:
Using a screwdriver and hammer, tap out the
oil seal.
Apply multi-purpose grease to the lip of a new
oil seal.
Notice:
...
Warning lights and indicators
The warning lights and indicators on the instrument cluster and
center panel inform the driver of the status of the vehicle’s various
systems.
For the purpose of explanation, the following illustration displays
all warning lights and indicators illuminated.
Instrument cluster
Some indi ...
Inspection
Inspect no. 1 Chain tensioner
Check that the plunger moves smoothly when the
ratchet pawl is raised with your finger.
Release the ratchet pawl, then check that the
plunger is locked in place by the ratchet pawl and
does not move when pushed with your finger.
Inspect chain ...