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 an 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011, P0012, P0021 OR P0022) 
   1. Connect an intelligent tester to the DLC3.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
   4. Read DTCs.

      Result 

      DTC RESULT DESCRIPTION
      
      

      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 TABLE  (See DIAGNOSTIC TROUBLE CODE TABLE  )

   A: Go TO NEXT STEP 

2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE OCV) 
   1. Connect an intelligent tester to the DLC3.
   2. Start the engine and turn the tester ON.
   3. Warm up the engine.
   4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1.
   5. Check the engine speed while operating the Oil Control Valve (OCV) using the tester.

      OK 

      TESTER OPERATIONS AND SPECIFIED CONDITIONS
      
      

      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 an intelligent tester 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.
   3. Check that the timing marks of the camshaft timing gears are aligned with the timing marks of the bearing cap.
      Fig 1: Identifying Timing Marks (RH & LH Bank)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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  Fig 1 . 

   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.
   2. Measure the resistance between the terminals of the OCV.

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATIONS
      
      

      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.
      Fig 2: Applying Positive Battery Voltage To Terminal 1 & Negative Battery Voltage To Terminal 2

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY  (See ON-VEHICLE INSPECTION 

   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 
8. CHECK WHETHER DTC OUTPUT RECURS 
   1. Connect an intelligent tester 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