Inspection Procedure

HINT:

• If DTC P0011 or P0012 is displayed, check the bank 1 VVT system circuit.
• Bank 1 refers to the bank that includes cylinder No. 1.
• If DTC P0021 or P0022 is displayed, check the bank 2 VVT system circuit.
• Bank 2 refers to the bank that does not include cylinder No. 1.
• Read freeze frame data using a Techstream. 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011, P0012, P0021 OR P0022) 
   1. Connect a Techstream to the DLC3.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes.
   4. Read DTCs.

      Result 

      RESULT CHART
      
      

      Display (DTC Output)	Proceed To
      P0011, P0012, P0021 or P0022	A
      P0011, P0012, P0021 or P0022 and other DTCs	B

      HINT:

      If any DTCs other than P0011, P0012, P0021 or P0022 are output, troubleshoot those DTCs first.

   B: GO TO DTC CHART  (See DIAGNOSTIC TROUBLE CODE CHART  )

   A: Go to next step 

2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV) 
   1. Connect a Techstream to the DLC3.
   2. Start the engine and turn the tester ON.
   3. Warm up the engine.
   4. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2).
   5. Check the engine speed while operating the Oil Control Valve (OCV) using the tester.

      OK 

      TESTER OPERATIONS SPECIFIED CONDITIONS CHART
      
      

      Tester Operations	Specified Conditions
      OCV OFF	Normal engine speed
      OCV ON	Engine idles roughly or stalls (soon after OCV switched from OFF to ON)

   NG:Go to step   4

   OK: Go to Next Step 

3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011, P0012, P0021 OR P0022) 
   1. Connect a Techstream to the DLC3.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Clear DTCs (See DTC CHECK/CLEAR  ).
   4. Start the engine and warm it up.
   5. Switch the ECM from normal mode to check mode using the tester (See CHECK MODE PROCEDURE  ).
   6. Drive the vehicle for more than 10 minutes.
   7. Read DTCs using the tester.

      OK: No DTC output. 

   OK: END 

   NG: Go to Next Step 

4. CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN) 
   1. Remove the cylinder head cover (See REMOVAL ).
   2. Turn the crankshaft pulley, and align its groove with the timing mark "0" of the timing chain cover.
   Fig 1: Identifying Groove With Timing Mark
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Check that the timing marks of the camshaft timing gears are aligned with the timing marks of the bearing cap as shown in the illustration.

      If not, turn the crankshaft 1 revolution (360°), then align the marks as above.

      OK: Timing marks on camshaft timing gears are aligned as shown in the illustration. 

   4. Reinstall the cylinder head cover (See INSTALLATION ).

   NG: ADJUST VALVE TIMING 

   OK: Go to Next Step 

5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OCV) 
   1. Remove the OCV.
   Fig 2: Identifying Camshaft Timing Oil Control Valve Assembly (OCV)
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART
      
      

      Tester Connections	Specified Conditions
      1 - 2	6.9 to 7.9 Ω at 20°C (68°F)

   3. Apply the positive battery voltage to terminal 1 and negative battery voltage to terminal 2. Check the valve operation.

      OK: Valve moves quickly. 

   4. Reinstall the OCV.

   NG: REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY  (See REMOVAL  )

   OK: Go to Next Step 

6. INSPECT OIL CONTROL VALVE FILTER 

   OK: Filter is not clogged. 

   NG: CLEAN OIL CONTROL VALVE FILTER 

   OK: Go to Next Step 

7. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY 

   NEXT: 

8. CHECK WHETHER DTC OUTPUT RECURS 
   1. Connect a Techstream to the DLC3.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Clear DTCs (See DTC CHECK/CLEAR  ).
   4. Start the engine and warm it up.
   5. Switch the ECM from normal mode to check mode using the tester (See CHECK MODE PROCEDURE  ).
   6. Drive the vehicle for more than 10 minutes.
   7. Confirm that no DTC is set using the tester.

      OK: No DTC output. 

      HINT:

      DTC P0011, P0012, P0021 or P0022 is output when foreign objects in engine oil are caught in some parts of the system. These codes will stay registered even if the system returns to normal after a short time. These foreign objects are then captured by the oil filter, thus eliminating the source of the problem.

   OK: SYSTEM OK 

   NG: REPLACE ECM  (See REMOVAL  )