Inspection Procedure

HINT:

Read freeze frame data using the Techstream tester. 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.

1. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE PURGE VSV CONTROL) 
   1. Connect the Techstream to the DLC3.
   2. Disconnect the vacuum hose from the purge VSV.
   3. Start the engine.
   4. Turn the Techstream on.
   5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control.
   6. When the purge VSV is operated using the Techstream, check whether the VSV applies suction to your finger.

      OK 

      SWITCH SPECIFICATION
      
      

      Tester Operation	Specified Condition
      VSV is ON	VSV applies suction to finger
      VSV is OFF	VSV applies no suction to finger

   7. Reconnect the vacuum hose to the purge VSV.

   NG: Go to step 2 

   Fig 1: Identifying Hose Location

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: CHECK FOR INTERMITTENT PROBLEMS  (See CHECK FOR INTERMITTENT PROBLEMS )

2. INSPECT PURGE VSV 
   1. Disconnect the purge VSV connector.
   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE
      
      

      Tester Connection	Condition	Specified Condition
      B19-1 - B19-2	20°C (68°F)	23 to 26 Ω

   3. Reconnect the purge VSV connector.

   NG: REPLACE PURGE VSV  (See PURGE VALVE )

   Fig 2: Identifying Purge VSV Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

3. INSPECT PURGE VSV (POWER SOURCE VOLTAGE) 
   1. Disconnect the purge VSV connector.
   2. Turn the ignition switch to ON.
   3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Switch Condition	Specified Condition
      B19-2 - Body ground	Ignition switch to ON	9 to 14 V

   4. Reconnect the purge VSV connector.

   NG: Go to step  5

   Fig 3: Identifying Purge VSV Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

4. CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM) 
   1. Disconnect the purge VSV connector.
   2. Disconnect the ECM connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open) 

      RESISTANCE REFERENCE
      
      

      Tester Connection	Condition	Specified Condition
      B19-1 - B31-49 (PRG)	Always	Below 1 Ω

      Standard Resistance (Check for Short) 

      RESISTANCE REFERENCE
      
      

      Tester Connection	Condition	Specified Condition
      B19-1 or B31-49 (PRG) - Body ground	Always	10 kΩ or higher

   4. Reconnect the purge VSV connector.
   5. Reconnect the ECM connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - ECM) 

   Fig 4: Identifying Purge VSV Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPLACE ECM  (See ECM )

5. INSPECT FUSE (EFI NO. 2 FUSE) 
   1. Remove the EFI No. 2 fuse from the engine room relay block.
   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE
      
      

      Tester Connection	Condition	Specified Condition
      EFI No. 2 fuse	Always	Below 1 Ω

   3. Reinstall the EFI No. 2 fuse.

   NG: REPLACE FUSE (EFI NO. 2 FUSE) 

   Fig 5: Identifying Engine Room Relay Block

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - ENGINE ROOM JUNCTION BLOCK (EFI MAIN RELAY))