Inspection Procedure

HINT:

• Using the intelligent tester monitor results enable the EVAP system to be confirmed.
• Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. CONFIRM DTC 
   1. Turn the ignition switch OFF and wait for 10 seconds.
   2. Turn the ignition switch ON.
   3. Turn the ignition switch OFF and wait for 10 seconds.
   4. Connect the intelligent tester to the DLC3.
   5. Turn the ignition switch ON.
   6. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT 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 0.02 inch reference pressure difference between the first and second checks is greater than the specification, the DTCs corresponding to the reference pressure (P043E, P043F, P0441, P0455, P0456, P2401 and P2420) will all be stored.
   Fig 1: DTC Reference Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. PERFORM EVAP SYSTEM CHECK (AUTO OPERATION) 
   NOTE:

   • The EVAP SYSTEM CHECK (AUTO OPERATION) consists of five steps performed automatically by the intelligent tester. It takes a maximum of approximately 18 minutes.
   • Do not perform the EVAP SYSTEM CHECK when the fuel tank is more than 90% full because the cut-off valve may be closed, making the leak check of the fuel tank not possible.
   • Do not run the engine in this step.
   • 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 EVAP SYSTEM CHECK, keep the temperature below 35°C (95°F).
   1. Clear the DTCs (see DTC CHECK / CLEAR  ).
   2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.
   3. After the EVAP SYSTEM CHECK is completed, check for pending DTCs by entering the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.

      HINT:

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

3. PERFORM EVAP SYSTEM CHECK (MANUAL OPERATION) 
   Fig 2: Malfunction - Perform EVAP System Check (Manual Operation)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002