Toyota Corolla (E120): Evap monitor (vacuum pressure monitor) (continued)

  1. Preconditions

The monitor will not run unless:

  • mil is off.
  • Fuel level is approximately 1/2 to 3/4.
  • Altitude is 7800 feet (2400 m) or less.*
  • Engine coolant temperature (ect) is between 40°f and 95°f (4.4 °C and 35 °C).
  • Intake air temperature (iat) is between 40°f and 95 °f (4.4 °C and 35 °C).*
  • Cold soak procedure has been completed.
  • Before starting the engine, the difference between ect and iat must be less than 13°f (7 °C).

Hint

:

examples:

  • scenario 1
    ect = 75°f (24 °C)
    iat = 60°f (16 °C)
    difference between ect and iat is 15°f (8 °C).

     The monitor will not run because difference between ect and iat is greater than 13°f (7 °C).

  • Scenario 2
    ect = 70°f (21 °C)
    iat = 68°f (20 °C)
    difference between ect and iat is 2°f (1 °C).

     The monitor will run because difference between ect and iat is less than 13°f (7 °C).

Notice

: * note for 2002 and later my vehicles: the readiness test can be completed in cold ambient conditions (less than 40°f / 4.4 °C) and/or at high altitudes (more than 7800 feet / 2400 m) if the drive pattern is repeated a second time after cycling the ignition off.

  1. Drive pattern
  1.  connect the obd ii scan tool to dlc3 to check monitor status and preconditions.
  2.  Release pressure in the fuel tank by removing and then reinstalling the fuel tank cap.
  3.  Start the engine and allow it to idle until ect becomes 167°f (75 °C) or greater.
  4.  Run the engine at 3,000 rpm for about 10 seconds.
  5.  Allow the engine to idle with the a/c on (to create slight load) for 15 to 50 minutes.

Notice

: if the vehicle is not equipped with a/c put a slight load on the engine by doing the following :

  • securely set the parking brake.
  • Block the drive wheels with wheel chocks.
  • Allow the vehicle to idle in drive for 15 to 50 minutes.
    Share this page:

    Other materials:

    Fuel information
    You must only use unleaded gasoline in your vehicle. Select octane rating 87 (Research Octane Number 91) or higher. Use of unleaded gasoline with an octane rating lower than 87 may result in engine knocking. Persistent knocking can lead to engine damage. At minimum, the gasoline you use should ...

    Inspection procedure
    1 Inspect ecm(+b voltage) Turn the ignition switch on.  measure the voltage between the terminals of the e4 and e6 ecm connectors. Standard: 2 Check harness and connector(ecm – body ground) Disconnect the e4 ecm connector. check the resistance between the wire ...

    Inspection procedure
    1 Check side squib(rh) circuit(airbag sensor assy center – front seat airbag assy rh) 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 ...