Inspection Procedure

1. CHECK FOR EXHAUST GAS LEAK 
   1. Allow the engine to idle.
   2. Check for exhaust gas leak around the heated oxygen sensor.

      OK: 

      No leak from the heated oxygen sensor  .

   NG: REPAIR OR REPLACE EXHAUST GAS LEAK POINT  (See EXHAUST PIPE (FOR 2WD) )

   OK: Go to next step 

2. INSPECT HEATED OXYGEN SENSOR 
   Fig 1: Driving Pattern Of Heated Oxygen Sensor Voltage

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream on.
   4. Start the engine and warm it up.
   5. Allow the engine to idle.
   6. Enter the following menus: Powertrain / Engine and ECT Active Test / Control the Injection Volume for A/F Sensor.
   7. Check the O2S B1S2 values when the Control the Injection Volume for A/F Sensor is -12.5% (Lean fuel-trim).
   8. Check the O2S B1S2 values when the Control the Injection Volume for A/F Sensor is 25% (Rich fuel-trim).

   Standard Voltage 

   VOLTAGE SPECIFICATION
   
   

   Control the Injection Volume for A/F Sensor	O2S B1S2
   -12.5%	Less than 0.2 V
   25%	More than 0.8 V

   NG: REPLACE HEATED OXYGEN SENSOR  (See HEATED OXYGEN SENSOR )

   OK: Go to next step 

3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0607) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream on.
   4. Clear the DTC (See DTC CHECK / CLEAR ).
   5. Turn the ignition switch to off and turn the Techstream off.
   6. Disconnect the Techstream.
   7. Disconnect the cable from the battery negative (-) terminal and wait for 1 minute.
   8. Connect the cable to the battery negative (-) terminal.
   9. Connect the Techstream to the DLC3.
   10. Turn the ignition switch to ON.
   11. Turn the Techstream on.
   12. Start the engine.
       Fig 2: Driving Pattern Of Engine Coolant Temperature

       Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   13. Perform the drive pattern.
       1. Warm up the engine.
       2. Accelerate the vehicle to 50 mph (80 km/h) and stop the vehicle.
       3. Drive the vehicle at 35 to 50 mph (60 to 80 km/h) for 5 minutes or more.
   14. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
   15. Read DTCs.

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   No output	A
   P0607	B

B: REPLACE ECM  (See ECM )

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