Toyota Tacoma manuals

Toyota Corolla Repair Manual: Purpose of the readiness tests

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).

Readiness monitor drive pattern
...

Catalyst monitor (o2s type)
Preconditions The monitor will not run unless: mil is off. Engine coolant temperature (ect) is 176f (80 C) or greater. Intake air temperature (iat) is 14f (10 C) or greater.* ...

Other materials:

Monitor description
Dtc p0451, p0452 or p0453 is recorded by the ecm when the vapor pressure sensor malfunctions. P0451 The ecm senses pressure in the fuel tank using the vapor pressure sensor. The ecm supplies the sensor with a regulated 5 v referencevoltage and the sensor returns a signal voltage between ...

Inspection procedure
1 Check side squib(lh) circuit(airbag sensor assy center front seat airbag assy lh) Disconnect the negative () terminal cable from the battery, and wait at least for 90 seconds.  disconnect the connectors between the airbag sensor assy center and the front seat airbag assy (lh ...

How to proceed with troubleshooting
1 Vehicle brought in 2 Customer problem analysis check and symptom check 3 Problem symptoms table Without applicable symptoms, proceed to a  with applicable symptoms, proceed to b 4 Perform troubleshooting in the following method, depending on malfunction symptom Ter ...

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