Inspection Procedure

HINT:

• If DTC P0014 or P0015 is displayed, check the exhaust camshaft circuit for the bank 1 VVT system.
• Bank 1 refers to the bank that includes cylinder No. 1.
• If DTC P0024 or P0025 is displayed, check the exhaust camshaft circuit for the bank 2 VVT system.
• Bank 2 refers to the bank that does not include cylinder No. 1.
• Read freeze frame data using the intelligent 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 (See FREEZE FRAME DATA ).

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0014, P0015, P0024 OR P0025) 
   1. Connect the intelligent tester to the DLC3.
   2. Turn the engine switch on (IG) and turn the tester on.
   3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
   4. Read the DTCs.

      Result 

      RESULT REFERENCE
      
      

      Display (DTC output)	Proceed to
      P0014, P0015, P0024 or P0025	A
      P0014, P0015, P0024 or P0025 and other DTCs	B

      HINT:

      If any DTCs other than P0014, P0015, P0024 or P0025 are output, troubleshoot those DTCs first.

   B: GO TO  DIAGNOSTIC TROUBLE CODE TABLE 

   A: Go to Next Step 

2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE OCV) 
   1. Connect the intelligent tester to the DLC3.
   2. Start the engine and turn the tester on.
   3. Warm up the engine.
   4. Enter the following menus: 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 SPECIFICATION
      
      

      Tester Operation	Specified Condition
      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 P0014, P0015, P0024 OR P0025) 
   1. Connect the intelligent tester to the DLC3.
   2. Turn the engine switch on (IG) and turn the tester on.
   3. Clear the 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 the DTCs using the tester.

      OK: 

      No DTC output. 

   NG: Go to step   4 

   OK: END 

4. CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN) 
   1. Remove the cylinder head covers RH and LH.
   2. Turn the crankshaft pulley, and align its groove with the timing mark "0" of the timing chain cover.
   Fig 1: Identifying Matchmarks Of Crankshaft & Camshaft Pulley
   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.

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

      OK: 

      The timing marks on the crankshaft timing gears are aligned. 

   4. Reinstall the cylinder head covers.

   NG: ADJUST VALVE TIMING 

   OK: Go to Next Step 

5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OCV FOR EXHAUST CAMSHAFT) 
   1. Remove the OCV.
   2. Measure the resistance between the terminals of the OCV.

      Standard resistance 

      RESISTANCE REFERENCE
      
      

      Tester Connection	Condition	Specified Condition
      1 - 2	20°C (68°F)	6.9 to 7.9 Ω

      Fig 2: Measuring Resistance Between Terminals Of OCV

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Apply 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 AND PIPE 
   1. Remove the oil pipe No. 1 or No. 2.
   2. Remove the oil control valve filter.
      Fig 3: Identifying Oil Pipe Assembly Bolts

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Check that the filter and pipe are not clogged.

      OK: 

      Filter is not clogged. 

   NG: CLEAN OIL CONTROL VALVE FILTER AND PIPE 

   OK: Go to Next Step 

7. REPLACE EXHAUST CAMSHAFT 
8. CHECK WHETHER DTC OUTPUT RECURS 
   1. Clear the DTCs.
      1. Operate the intelligent tester, or disconnect the EFI and ETCS fuses more than 60 seconds to erase the codes.
   2. Start the engine and warm up the engine.
   3. Switch the ECM from normal mode to check mode using the intelligent tester (See CHECK MODE PROCEDURE ).
   4. Drive the vehicle for more than 10 minutes or more.
   5. Read the output DTCs using the intelligent tester.

      OK: 

      No DTC output. 

      HINT:

      DTC P0014, P0015, P0024 or P0025 is output when foreign objects in engine oil are caught in some parts of the system. These codes will stay output even if the system returns to normal after a short time. These foreign objects are then captured by the oil, thus eliminating the source of the problem.

   OK: SYSTEM IS OK 

   NG: REPLACE ECM (See  REMOVAL  )