Inspection Procedure

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

HINT

INSPECTION PROCEDURE CHART

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

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 the 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 the No. 1 cylinder
Read freeze frame data using the 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.

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

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

Read the DTCs

Result

RESULT CHART

Result	Proceed to
DTC P0014, P0015, P0024 or P0025 is output	A
DTC P0014, P0015, P0024 or P0025 and other DTCs are output	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 USING TECHSTREAM (OIL CONTROL VALVE FOR EXHAUST SIDE OPERATION)

Connect the Techstream to the DLC3
Start the engine and turn the Techstream ON
Warm up the engine
Enter the following menus. Powertrain / Engine / Active Test / Control the VVT Exhaust Linear (Bank 1) or Control the VVT Exhaust Linear (Bank 2)

Check the engine speed while operating the oil control valve using the Techstream

ENGINE CONDITION TESTER OPERATION CHART

Tester Operation	Engine Condition
0%	Normal engine speed
100%	Engine idles roughly

NG: Go to step 4

OK: Go to next step

CHECK WHETHER DTC OUTPUT RECURS (DTC P0014, P0015, P0024 OR P0025)

Connect the Techstream to the DLC3
Turn the engine switch on (IG) and turn the Techstream ON
Clear DTCs (See DTC CHECK/CLEAR )
Start the engine and warm it up.
Switch the ECM from normal mode to check mode using the Techstream (See CHECK MODE PROCEDURE ).
With the engine warmed up, idle it for 1 minute Then drive the vehicle for 5 minutes

Read the DTCs using the Techstream

Result

RESULT CHART

Result	Proceed to
DTC is not output	A
DTC P0014, P0015, P0024 or P0025 is output	B

B: Go to step 4

A: CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT PROBLEMS )

INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST SIDE)

Remove the camshaft timing oil control valve assembly for bank 1 and/or bank 2 (See REMOVAL )

Measure the resistance according to the value(s) in the table below

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

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

Fig 1: Measuring Oil Control Valve Assembly Terminals Resistance

Connect a lead from the positive battery terminal to terminal 1, and a lead from the negative battery terminal to terminal 2. Check the valve operation
OK: Valve moves quickly.
Reinstall the camshaft timing oil control valve assembly

Fig 2: Checking Valve Operation

NG: REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (BANK 1 AND/OR BANK 2) (See REMOVAL )

OK: Go to next step

INSPECT OIL CONTROL VALVE FILTER (BANK 1 AND/OR BANK 2)
1. Remove the cylinder head cover sub-assembly (See DISASSEMBLY ).
2. Remove the camshaft timing oil control valve filter (See DISASSEMBLY )
3. Inspect the camshaft timing oil control valve filter
  OK: Filter is not clogged.
4. Reinstall the camshaft timing oil control valve filter (See REASSEMBLY )
5. Reinstall the cylinder head cover sub-assembly (See REASSEMBLY )
NG: REPLACE OIL CONTROL VALVE FILTER (See DISASSEMBLY )

OK: Go to next step
CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN) (See DTC P0017 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELATION (BANK 1 SENSOR B); DTC P0019 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELATION (BANK 2 SENSOR B) )
NG: ADJUST VALVE TIMING (See REASSEMBLY )

OK: Go to next step
REPLACE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY (BANK 1 AND/OR BANK 2)
1. Replace the camshaft timing exhaust gear assembly for bank 1 and/or bank 2 (See REMOVAL ).

CHECK WHETHER DTC OUTPUT RECURS

Connect the Techstream to the DLC3
Turn the engine switch on (IG) and turn the Techstream ON
Clear DTCs (See DTC CHECK/CLEAR )
Start the engine and warm up
Switch the ECM from normal mode to check mode using the Techstream (See CHECK MODE PROCEDURE ).
With the engine warmed up, idle it for 1 minute Then drive the vehicle for 5 minutes

Read output DTCs using the Techstream.

Result

RESULT CHART

Result	Proceed to
DTC is not output	A
DTC P0014, P0015, P0024 or P0025 is output	B

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

B: REPLACE ECM (See REMOVAL )

A: END