Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

RETARDED CAMSHAFT TIMING REFERENCE

Abnormal bank	Advanced timing over (Valve timing is out of specified range)	Retarded timing over (Valve timing is out of specified range)
Bank 1	P0011	P0012
Bank 2	P0021	P0022

If DTC P0011 or P0012 is displayed, check the right bank VVT system for intake camshaft circuit (bank 1).
Bank 1 refers to the bank that includes cylinder No. 1.
If DTC P0021 or P0022 is displayed, check the left bank VVT system for intake camshaft circuit (bank 2).
Bank 2 refers to the bank that does not include cylinder No. 1.
Read freeze frame data using Techstream. 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 ).

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011, P0012, P0021 OR P0022)

Connect Techstream to the DLC3.
Turn the engine switch on (IG) and turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Read DTCs.

Result

RESULT REFERENCE CHART

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 CHART

A: Go to Next Step

PERFORM ACTIVE TEST BY TECHSTREAM (OPERATE OCV)

Connect Techstream to the DLC3.
Start the engine and turn the tester on.
Warm up the engine.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2).

Check the engine speed while operating the Oil Control Valve (OCV) using the tester.

TESTER OPERATION SPECIFIED CONDITION CHART

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

CHECK WHETHER DTC OUTPUT RECURS (DTC P0011, P0012, P0021 OR P0022)
1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the tester on.
3. Clear DTCs.
4. Start the engine and warm it up.
5. Switch the ECM from normal mode to check mode using the tester.
6. Drive the vehicle for more than 10 minutes.
7. Read DTCs using the tester.
  OK:
  
  No DTC output.
NG: Go to step 4

OK: END
CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)
1. Remove the cylinder head cover RH and LH.
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 camshaft timing gears are aligned as shown in the illustration.
4. Reinstall the cylinder head cover.
NG: ADJUST VALVE TIMING

OK: Go to Next Step
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OCV)
1. Remove the OCV.
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 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 And Negative Battery Voltage To Terminal 2
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

OK: Go to Next Step
INSPECT OIL CONTROL VALVE FILTER AND PIPE
1. Remove the No. 1 and No. 2 oil pipes.
2. Remove the oil control valve filter.
3. Check that the filter and pipe are not clogged.
  OK:
  
  The filter and pipe are not clogged.
  
  Fig 3: Locating Oil Control Valve Filter And Pipe
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: CLEAN OIL CONTROL VALVE FILTER AND PIPE

OK: Go to Next Step
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY
CHECK WHETHER DTC OUTPUT RECURS
1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the tester on.
3. Clear DTCs.
4. Start the engine and warm up.
5. Switch the ECM from normal mode using the check mode using the tester.
6. Driver the vehicle for more than 10 minutes.
7. Read output DTCs using Techstream.
  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 IS OK

NG: REPLACE ECM