Toyota Corolla Repair Manual: Purpose of the readiness tests
- The on–board diagnostic (obd ii) system is designed to monitor the performance of emission–related components and report any detected abnormalities in the form of diagnostic trouble codes (dtcs). Since the various components need to be monitored during different driving conditions, the obd ii system is designed to ran separate monitoring programs called readiness monitors. Many state inspection and maintenance (i/m) programs require that vehicles complete their readiness monitors prior to beginning an emissions test.
- The current status of the readiness monitors can be seen by using the hand–held tester with version 9.0 Software (or newer), or a generic obd ii scan tool.
- To view the readiness monitor status using the hand–held tester, select ”monitor status” from the enhanced obd ii menu.
- A status of ”complete” indicates that the necessary conditions have been met to run the performance tests for the related readiness monitor.
- The readiness monitor will be reset to ”incomplete” if:
- ecm has lost power (battery or fuse).
- Dtcs have been cleared.
- The conditions for running the readiness monitor have not been met.
- In the event that any readiness monitor shows ”incomplete,” follow the appropriate readiness monitor drive pattern to change the readiness status to ”complete.”
Caution
: strict observance of posted speed limits, traffic laws, and road conditions are required when performing these drive patterns.
Notice
: these drive patterns represent the fastest method to satisfy all necessary conditions which allow the specific readiness monitor to complete.
In the event that the drive pattern must be interrupted (possibly due to traffic conditions or other factors) the drive pattern can be resumed, and in most cases, the readiness monitor will still set to complete.
To ensure rapid completion of readiness monitors, avoid sudden changes in vehicle load and speed (driving up and down hills and/or sudden acceleration).
Catalyst monitor (o2s type)
Preconditions
The monitor will not run unless:
mil is off.
Engine coolant temperature (ect) is 176°f (80 °C) or greater.
Intake air temperature (iat) is 14°f (–10 °C) or greater.*
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Other materials:
Inspection procedure
Hint:
start the inspection from step 1 in case of using the hand–held tester and start
from step 2 in case of not
using the hand–held tester.
1 Perform active test by hand–held tester(abs motor relay)
Check the operation sound of the abs motor individually when operaing it
with the hand– ...
Foreword
This repair manual has been prepared to provide essential information
on body panel repair methods (including cutting and
welding operations, but excluding painting) for the toyota
corolla
Applicable models: aze141 series
zre142 series
This manual consists of body repair methods, exploded diag ...
Circuit description
When the ignition switch is turned on, battery positive voltage is applied to
the coilwhich closes the contacts
of the efi main relay (marked: efi) and supplies power to terminal +b of the ecm.
This signal causes current to flow to the coil, closing the contacts of the efi
relay and supplyin ...