Inspection Procedure

HINT:

• Using Techstream monitor results enables the EVAP (Evaporative Emission) system to be confirmed.
• Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (See FREEZE FRAME DATA ).

1. CONFIRM DTC 
   1. Turn the ignition switch off and wait for 10 seconds.
   2. Turn the ignition switch to the ON position.
   3. Turn the ignition switch off and wait for 10 seconds.
   4. Connect the Techstream to the DLC3.
   5. Turn the ignition switch to the ON position and turn the Techstream on.
   6. Select the following menu items: Powertrain/Engine and ECT/Trouble Codes.
   7. Confirm DTCs and freeze frame data.

      If any EVAP system DTCs are set, the malfunctioning area can be determined using the table below.

      NOTE: If the reference pressure difference between the first and second checks is greater than the specification, ail the DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and P2419) are stored.
   Fig 1: DTC And Malfunction Area Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE) 
   NOTE:

   • The Evaporative System Check (Automatic Mode) consists of 5 steps performed automatically by the Techstream. It takes a maximum of approximately 18 minutes.
   • Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable.
   • Do not run the engine during this operation.
   • When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature below 35°C (95°F).
   1. Clear the DTCs (See DTC CHECK/CLEAR  ).
   2. On the tester, select the following menu items: Powertrain/Engine and ECT/Utility/Evaporative System Check/Automatic Mode.
   3. After the Evaporative System Check is completed, check for pending DTCs by selecting the following menu items: Powertrain/Engine and ECT/Trouble Codes/Pending.

      HINT:

      If no pending DTCs are displayed, perform the MONITOR CONFIRMATION (see "Diagnostic Help" menu). After this confirmation, check for pending DTCs. If no DTCs are displayed, the EVAP system is normal.

3. PERFORM EVAPORATIVE SYSTEM CHECK (MANUAL MODE) 
   Fig 2: EVAP Pressure Malfunction Chart - Manual Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002