Inspection Procedure

HINT:

• If DTC P0011 or P0012 is displayed, check the VVT system circuit.
• Read freeze frame data using the hand-held tester or the OBDII scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

Hand-held tester: 

1. CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TOOTH OF TIMING CHAIN) (See  REPLACEMENT  ) 
   • NG : ADJUST VALVE TIMING (See  REPLACEMENT  ) 
   • OK : GO to next step 
2. PERFORM ACTIVE TEST BY HAND-HELD TESTER (OPERATE OCV) 
   1. Connect the hand-held tester to the DLC3.
   2. Start the engine and warm it up.
   3. Turn the ignition switch ON and push the hand-held tester main switch ON.
   4. Select the item "DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1".
   5. Check the engine speed when operating the OCV by the hand-held tester.

      Standard: 

      TESTER OPERATION AND SPECIFIED CONDITION
      
      

      Tester Operation	Specified Condition
      OCV is OFF	Normal engine speed
      OCV is ON	Rough idle or engine stall

   • NG : Go to step   4 
   • OK : Go to next step 
3. CHECK IF DTC OUTPUTS REOCCUR 
   1. Clear the DTCs.
      1. Operate the hand-held tester to erase the codes, or disconnect the battery terminal or remove the EFI fuse for more than 60 seconds.
   2. Start and warm up the engine.
   3. Drive the vehicle around for 10 minutes or more.
   4. Read output DTCs using the hand-held tester.

      Standard: No DTC output. 

      HINT:

      *: DTC P0011 or P0012 is output when a foreign object in engine oil is caught in some part 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.

   5. Reconnect the battery terminal or install the EFI fuse.
   • OK: VVT SYSTEM OK 
   • NG : GO to next step 
4. INSPECT ECM (OCV SIGNAL) 
   Fig 1: Identifying ECM OCV Signal Waveform Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Inspect using the oscilloscope.
   2. During idling, check the waveform between the terminals of the E3 ECM connector.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      OCV+ (E3-15) - OCV - (E3-14)	Correct waveform is as shown

   • NG : REPLACE ECM (See  REPLACEMENT  ) 
   • OK : GO to next step 
5. INSPECT OIL CONTROL VALVE FILTER 
   • NG : REPLACE OIL CONTROL VALVE FILTER 
   • OK : GO to next step. 
6. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY (OCV) (See  INSPECTION  ) 
   • OK : Go to step   8 
   • NG : GO to next step 
7. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSY (OCV) 
   • GO to next step 
8. INSPECT CAMSHAFT TIMING GEAR ASSY (See  REPLACEMENT  ) 
   • OK : Go to step   a 
   • NG : GO to next step 
9. REPLACE CAMSHAFT TIMING GEAR ASSY 
   • GO to next step 
10. CHECK FOR BLOCKAGE (OCV, OIL CHECK VALVE AND OIL HOLE) 
    • NG : REPAIR OR REPLACE 
    • OK : GO to next step. 
11. CHECK IF DTC OUTPUTS REOCCUR 
    1. Clear the DTCs.
       1. Operate the hand-held tester to erase the codes, or disconnect the battery terminal or remove the EFI fuse for more than 60 seconds.
    2. Start and warm up the engine.
    3. Drive the vehicle around for 10 minutes or more.
    4. Read output DTC using the hand-held tester.

       Standard: No DTC output. 

       HINT:

       *: DTC P0011 or P0012 is output when a foreign object in engine oil is caught in some part 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.

    5. Reconnect the battery terminal or install the EFI fuse.

    OBDII scan tool (excluding hand-held tester): 

    • OK : VVT SYSTEM OK 
    • NG : GO to next step 

REPLACE ECM (See  REPLACEMENT  ) 

1. CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TOOTH OF TIMING CHAIN) (See  REPLACEMENT  ) 
   • NG : ADJUST VALVE TIMING (See  REPLACEMENT  ) 
   • OK : GO to next step. 
2. CHECK OPERATION OF OCV 
   Fig 2: Identifying Camshaft Timing Oil Control Valve Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Start the engine.
   2. Check the engine speed at (1) and (2).
      1. Disconnect the C2 camshaft timing oil control valve connector.
      2. Apply battery positive voltage between the terminals of the camshaft timing oil control valve.

         Result: 

         RESULT REFERENCE
         
         

         Proceed to	Check (1)	Check (2)
         A	Normal engine speed	Rough idle or engine stall
         B	Conditions other than A

      3. Reconnect the camshaft timing oil control valve connector.
   • B : Go to step   4 
   • A : Go to next Step 
3. CHECK IF DTC OUTPUTS REOCCUR (CHECK IF DTC OUTPUT RECURS) 
   1. Clear the DTCs.
      1. Operating the OBD II scan tool to erase the codes, or disconnect the battery terminal or remove the EFI fuse for more than 60 seconds.
   2. Start and warm up the engine.
   3. Drive the vehicle around for 10 minutes or more.
   4. Read output DTCs using the OBD II scan tool.

      Standard: No DTC output. 

      HINT:

      *: DTC P0011 or P0012 is output when a foreign object in engine oil is caught in some part 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: VVT SYSTEM OK 
   • NG : GO to next step 
4. INSPECT ECM (OCV SIGNAL) 
   Fig 3: Identifying ECM OCV Signal Waveform Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Inspect using the oscilloscope.
   2. During idling, check the waveform between the terminals of the E3 ECM connector.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      OCV+(E3-15)-OCV-(E3-14)	Correct waveform is as shown

   • NG : REPLACE ECM (See  REPLACEMENT  ) 
   • OK : GO to next step 
5. INSPECT OIL CONTROL VALVE FILTER 
   • NG : REPLACE OIL CONTROL VALVE FILTER 
   • OK : GO to next step. 
6. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY (OCV) (See  INSPECTION  ) 
   • OK : Go to step   8 
   • NG : GO to next step 
7. REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSY (OCV) 
   • GO to next step 
8. INSPECT CAMSHAFT TIMING GEAR ASSY (See  REPLACEMENT  ) 
   • OK : Go to step   10 
   • NG : GO to next step 
9. REPLACE CAMSHAFT TIMING GEAR ASSY 
   • GO to next step 
10. CHECK FOR BLOCKAGE (OCV, OIL CHECK VALVE AND OIL HOLE) 
    • NG : REPAIR OR REPLACE 
    • OK : GO to next step 
11. CHECK IF DTC OUTPUTS REOCCUR 
    1. Clear the DTCs.
       1. Operate the OBD II scan tool to erase the codes, or disconnect the battery terminal or remove the EFI fuse for more than 60 seconds.
    2. Start and warm up the engine.
    3. Drive the vehicle around for 10 minutes or more.
    4. Read output DTCs using the OBD II scan tool.

       Standard: No DTC output. 

       HINT:

       *: DTC P0011 or P0012 is output when a foreign object in engine oil is caught in some part 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.

    5. Reconnect the battery terminal or install the EFI fuse.
    • OK : VVT SYSTEM OK 
    • NG : GO to next step 

REPLACE ECM (See  REPLACEMENT  )