Inspection Procedure

HINT:

• If DTC P0014 or P0015 is displayed, check the bank 1 VVT system for exhaust side circuit.
• Bank 1 refers to the bank that includes No. 1 cylinder.
• If DTC P0024 or P0025 is displayed, check the bank 2 VVT system for exhaust side circuit.
• Bank 2 refers to the bank that does not include No. 1 cylinder.
• Read freeze frame data using the Techstream. Freeze frame data records 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 P0014, P0015, P0024 OR P0025) 
   1. Connect the Techstream to the DLC3.
   2. Turn the engine switch on (IG) and turn the Techstream ON.
   3. Enter the following menus: Powertrain / Engine / Trouble Codes.
   4. Read DTCs.

      Result 

      RESULT CHART
      
      

      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 POOH, P0015, P0024 or P0025 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 BY TECHSTREAM (OCV FOR EXHAUST SIDE OPERATION) 
   1. Connect the Techstream to the DLC3.
   2. Start the engine and turn the Techstream ON.
   3. Warm up the engine.
   4. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT Exhaust Linear (Bank 1) or Control the VVT Exhaust Linear (Bank 2).
   5. Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream.

      OK 

      TESTER OPERATION REFERENCE
      
      

      Tester Operation	Engine Condition
      0%	Normal engine speed
      127%	Engine idles roughly

   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 Techstream to the DLC3.
   2. Turn the engine switch on (IG) and turn the Techstream 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 Techstream (see CHECK MODE PROCEDURE ).
   6. With the engine warmed up, idle it for 1 minute. Then drive the vehicle for 5 minutes.
   7. Read DTCs using the Techstream.

      OK: No DTC output. 

   OK: END 

   NG: Go to next step 

4. CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)  (See INSPECTION PROCEDURE  )

   NG: ADJUST VALVE TIMING  (See INSTALLATION )

   OK: Go to next step 

5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY 
   1. Remove the OCV (see REMOVAL ).
   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

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

      Fig 1: Checking Camshaft Oil Control Valve Operation

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Apply the positive battery voltage to terminal 1 and negative battery voltage to terminal 2. Check the valve operation.

      OK: Valve moves quickly. 

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

   OK: Go to next step 

6. INSPECT OIL CONTROL VALVE FILTER 
   1. Remove the cylinder head cover sub-assembly (see DISASSEMBLY ).
   2. Remove the OCV filter (see DISASSEMBLY ).
   3. Inspect the OCV filter.

      OK: Filter is not clogged. 

   NG: REPLACE OIL CONTROL VALVE FILTER  (See DISASSEMBLY )

   OK: Go to next step 

7. REPLACE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY 
   1. Replace the camshaft timing exhaust gear assembly (see REMOVAL ).
8. CHECK WHETHER DTC OUTPUT RECURS 
   1. Connect the Techstream to the DLC3.
   2. Turn the engine switch on (IG) and turn the Techstream ON.
   3. Clear DTCs (see DTC CHECK / CLEAR ).
   4. Start the engine and warm up.
   5. Switch the ECM from normal mode to check mode using the Techstream (see CHECK MODE PROCEDURE ).
   6. With the engine warmed up, idle it for 1 minute. Then drive the vehicle for 5 minutes.
   7. Read output DTCs using the Techstream.

      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 registered 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 OK 

   NG: REPLACE ECM  (See REMOVAL )