Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. Freeze frame data record the engine condition 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. CHECK FOR EXHAUST GAS LEAK 
   1. Allow the engine to idle.
   2. Check for exhaust gas leak around the HO2S.

      OK: 

      No leak from the HO2S. 

   NG: REPAIR LEAK 

   OK: Go to Next Step 

2. CHECK HEATED OXYGEN SENSOR 
   1. Warm up the engine.
      Fig 1: HO2S Voltage Graph

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Allow the engine to idle.
   3. Select the tester menus: ENHANCED OBDII, ACTIVE TEST AND A/F CONTROL.
   4. Check the O2S B1S2 (O2S B2S2) values when the A/F CONTROL is -12.5% (Lean fuel-trim).
   5. Check the O2S B1S2 (O2S B2S2) values when the A/F CONTROL is 25% (Rich fuel-trim).

      Standard 

      STANDARD REFERENCE
      
      

      A/F CONTROL	O2S B1S2 (O2S B2S2)
      -12.5%	Less than 0.2 V
      25%	More than 0.8 V

   NG: REPLACE HEATED OXYGEN SENSOR 

   OK: Go to Next Step 

3. CHECK DTC 
   1. Clear DTC.
   2. Turn the ignition switch OFF.
   3. Disconnect the battery negative terminal and wait for 1 minute.
   4. Connect the battery negative terminal.
   5. Start the engine.
      Fig 2: Vehicle Speed Driving Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   6. Perform the drive pattern.
      1. Warm up the engine.
      2. Accelerate the vehicle until 80 km/h (50 mph) and stop the vehicle.
      3. Drive the vehicle by 60 to 80 km/h (35 to 50 mph) for 5 minutes or more.
   7. Check DTC.

      OK: 

      P0606 is not present. 

   NG: REPLACE ECM 

   OK : CHECK FOR INTERMITTENT PROBLEMS