Inspection Procedure

VALVE TIMING SPECIFIED RANGE

Abnormal bank	Advanced timing over (Valve timing is out of specified range)	Retarded timing over (Valve timing is out of specified range)
Bank 1	P0014	P0015
Bank 2	P0024	P0025

HINT:

If DTC P0014 or P0015 is displayed, check the bank 1 VVT system circuit.
Bank 1 refers to the bank that includes cylinder No. 1.
If DTC P0024 or P0025 is displayed, check the bank 2 VVT system circuit.
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.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0014, P0015, P0024 OR P0025)

Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position and turn the tester on.
Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

Read the DTCs.

Result

RESULT CHART

Display (DTC Output)	Proceed to
P0014, P0015, P0024 or P0025	A
POOH, 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 (See DIAGNOSTIC TROUBLE CODE CHART )

A: Go to Next Step

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE OCV)

Connect the intelligent tester to the DLC3.
Start the engine and turn the tester on.
Warm up the engine.
Select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST/ VVT EXB1 or VVT EXB2.

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

ACTIVE TEST CHART

Tester Operation	Specified Condition
OCV OFF	Normal engine idle 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 P0014, P0015, P0024 OR P0025)
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position and turn the tester on.
3. Clear the DTCs (See DTC CHECK/CLEAR ).
4. Start the engine and warm it up.
5. Select the 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 outputs.
NG: Go to step 4

OK: END
CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMP TEETH ON TIMING CHAIN)
1. Remove the cylinder head covers RH and LH.
2. Turn the crankshaft to align the matchmarks of the crankshaft.
3. Align the notch of the crankshaft pulley to the "0" position.
4. Check if the matchmarks of the camshaft pulley and camshaft bearing cap align.
5. Turn the crankshaft clockwise by 360° if the matchmarks do not align. Check if they align once again.
  OK:
  
  The matchmarks of the camshaft pulley and the camshaft bearing cap align when the notch of the crankshaft pulley is in the "0" position.
NG: ADJUST VALVE TIMING

Fig 1: Identifying Matchmarks Of Crankshaft And Camshaft Pulley
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Fig 2: Inspecting Camshaft Timing Oil Control Valve Assembly (OCV)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step
CHECK OIL PIPE AND OIL CONTROL VALVE FILTER
1. Remove the oil pipe No. 1 or oil pipe assembly.
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.
NG: REPLACE OIL PIPE OR OIL CONTROL VALVE FILTER

Fig 3: Locating Oil Pipe Assembly Bolts
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY
CHECK WHETHER DTC OUTPUT RECURS
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position and turn the tester on.
3. Clear the DTCs (See DTC CHECK/CLEAR ).
4. Start the engine and warm it up.
5. Select the check mode using the tester (See CHECK MODE PROCEDURE ).
6. Drive the vehicle for more than 10 minutes.
7. Confirm that no DTC is set using the 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 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.
NG: REPLACE ECM (See REMOVAL )

OK: END