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Home >> Lexus >> 2010 >> GS 350 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 171 (Engine Control System (DTCS P0010 - P0368)) >> SFI System >> DTC P0014: Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1); DTC P0015: Camshaft Position "B" - Timing Over-Retarded (Bank 1); DTC P0024: Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 2); DTC P0025: Camshaft Position "B" - Timing Over-Retarded (Bank 2) >> Procedure

DTC P0014: Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1); DTC P0015: Camshaft Position "B" - Timing Over-Retarded (Bank 1); DTC P0024: Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 2); DTC P0025: Camshaft Position "B" - Timing Over-Retarded (Bank 2): Procedure

WARNING: This page is about a different car, the 2009 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0014, P0015, P0024 OR P0025) 
    1. Connect Techstream to the DLC3.
    2. Turn the engine switch on (IG) and turn the tester on.
    3. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
    4. Read DTCs.

      Result

      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 DTC CHART 

    A: Go to next step 

  2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV) 
    1. Connect Techstream to the DLC3.
    2. Start the engine and turn the tester on.
    3. Warm up the engine.
    4. Enter the following menus: Powertrain / Engine and ECT / 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 tester.

      OK

      Tester Operation Specified Condition
      -128% (Oil control valve OFF) Normal engine speed
      127% (Oil control valve ON) Engine idles roughly or stalls (soon after OCV switched from OFF to ON)

    NG → See step   4 

    OK: Go to next step 

  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0014, P0015, P0024 OR P0025) 
    1. Connect Techstream to the DLC3.
    2. Turn the engine switch on (IG) and turn the tester on.
    3. Clear DTCs. Refer to DTC CHECK / CLEAR .
    4. Start the engine and warm it up.
    5. Switch the ECM from normal mode to check mode using the tester. Refer to CHECK MODE PROCEDURE .
    6. Drive the vehicle for more than 10 minutes.
    7. Read DTCs using the tester.

      OK

      No DTC output.

    NG → See 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.
      Fig 1: Checking Timing Marks Of Camshaft Timing Gears
      GTY145286Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 as shown in the illustration.

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

      OK

      Timing marks on crankshaft timing gears are aligned as shown in the illustration.

    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.
      Fig 2: Measuring Resistance Between Terminals Of OCV
      GTY104559Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance between the terminals of the OCV.

      Standard resistance

      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.
      Fig 3: Checking Operation Of OCV
      GTY104565Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      Valve moves quickly.

    4. Reinstall the OCV.

    NG → REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY 

    OK: Go to next step 

  6. INSPECT OIL CONTROL VALVE FILTER AND PIPE 
    1. Remove the oil pipe No. 1 or No. 2.
      Fig 4: Locating Oil Control Valve Filter & Pipe
      GTY145287Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the oil control valve filter.
    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 CAMSHAFT TIMING GEAR ASSEMBLY (FOR EXHAUST CAMSHAFT) 

    NEXT: Go to next step 

  8. CHECK WHETHER DTC OUTPUT RECURS 
    1. Clear the DTCs.
      1. Operate Techstream, or disconnect the EFI and ETCS fuses more than 60 sec. to erase the codes.
    2. Start the engine and warm up the engine.
    3. Switch the ECM from normal mode to check mode using Techstream. Refer to CHECK MODE PROCEDURE .
    4. Drive the vehicle for more than 10 minutes or more.
    5. Read output DTCs using 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 IS OK 

    NG → REPLACE ECM 

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