SFI SYSTEM, Diagnostic DTC:P0014, P0015, P0024, P0025

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

DESCRIPTION

Refer to DTC P0013 Click here.

DTC No.	DTC Detection Condition	Trouble Area
P0014 P0024	Exhaust valve timing is stuck at a certain value when in the advance range (2 trip detection logic).	Valve timing Camshaft timing oil control valve assembly (for exhaust camshaft of bank 1, 2) Oil control valve filter (RH, LH) Oil pipe Camshaft timing exhaust gear assembly (bank 1, 2) ECM
P0015 P0025	Exhaust valve timing is stuck at a certain value when in the retard range (1 trip detection logic).

DTC No.

DTC Detection Condition

Trouble Area

P0014

P0024

Exhaust valve timing is stuck at a certain value when in the advance range (2 trip detection logic).

Valve timing
Camshaft timing oil control valve assembly (for exhaust camshaft of bank 1, 2)
Oil control valve filter (RH, LH)
Oil pipe
Camshaft timing exhaust gear assembly (bank 1, 2)
ECM

P0015

P0025

Exhaust valve timing is stuck at a certain value when in the retard range (1 trip detection logic).

MONITOR DESCRIPTION

The ECM optimizes the exhaust valve timing using the Variable Valve Timing (VVT) system to control the exhaust camshaft. The VVT system includes the ECM, the camshaft timing oil control valve assembly (for exhaust camshaft) and the VVT controller (camshaft timing exhaust gear assembly). The ECM sends a target duty-cycle control signal to the camshaft timing oil control valve assembly (for exhaust camshaft). This control signal regulates the oil pressure supplied to the VVT controller. The VVT controller can advance or retard the exhaust camshaft.

If the difference between the target and actual exhaust valve timing is large, and changes in the actual exhaust valve timing are small, the ECM interprets this as a VVT controller stuck malfunction and stores a DTC.

Example:

A DTC is stored when the following conditions "A" and "B" are met (DTCs P0014 and P0024):

(a) It takes 5 seconds or more to change the valve timing by 5°CA (Condition "A").
(b) After the above condition "A" is met, the camshaft timing oil control valve assembly is forcibly activated 63 times or more (when the vehicle is idling, this takes approximately 100 seconds) (Condition "B").

A DTC is stored when the following conditions "A" and "B" are met (DTCs P0015 and P0025):

(a) It takes 5 seconds or more to change the valve timing by 5°CA (Condition "A").
(b) After the above condition "A" is met, the camshaft timing oil control valve assembly is forcibly activated 14 times or more (when the vehicle is idling, this takes approximately 100 seconds) (Condition "B").

DTCs P0014 and P0024 (Advanced Cam Timing) are subject to 2 trip detection logic.
DTCs P0015 and P0025 (Retarded Cam Timing) are subject to 1 trip detection logic.
These DTCs indicate that the VVT controller cannot operate properly due to a camshaft timing oil control valve assembly (for exhaust camshaft) malfunction or the presence of foreign objects in the camshaft timing oil control valve assembly (for exhaust camshaft).

MONITOR STRATEGY

Required Sensors/Components (Main)

Camshaft timing oil control valve assembly (for exhaust camshaft)

Camshaft timing exhaust gear assembly

Required Sensors/Components (Related)

Crankshaft position sensor

VVT sensor

Engine coolant temperature sensor

Frequency of Operation

Continuous

CONFIRMATION DRIVING PATTERN

Connect the GTS to the DLC3.
Turn the engine switch on (IG) and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG) and turn the GTS on [A].
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].
Drive the vehicle at approximately 60 km/h (37 mph) for 10 minutes or more [C].

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Idle the engine for 3 minutes or more [D].
Enter the following menus: Powertrain / Engine / Trouble Codes [E].
Read the pending DTCs.
Tech Tips
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P0014, P0015, P0024 or P0025.

Check the DTC judgment result.

GTS Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

Tech Tips

If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform steps [F] through [H].

Repeat the pattern of accelerating the vehicle from rest to approximately 60 km/h (37 mph) and then decelerating the vehicle 10 to 15 times [F].

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

Tech Tips

Depress the accelerator pedal by a large amount.
Idle the engine for 3 minutes or more [G].
Enter the following menus: Powertrain / Engine / Trouble Codes [H].
Read the pending DTCs.
Tech Tips
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Check the DTC judgment result again.
Tech Tips
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.

WIRING DIAGRAM

Refer to DTC P0013 Click here.

CAUTION / NOTICE / HINT

Tech Tips

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

Abnormal Bank

Timing Over Advanced

(Valve timing is out of specified range)

Timing Over Retarded

(Valve timing is out of specified range)

Bank 1

P0014

P0015

Bank 2

P0024

P0025

If DTC P0014 or P0015 is output, check the VVT system (for exhaust camshaft of bank 1) circuit.
If DTC P0024 or P0025 is output, check the VVT system (for exhaust camshaft of bank 2) circuit.
Bank 1 refers to the bank that includes the No. 1 cylinder*.

*: The No. 1 cylinder is the cylinder which is farthest from the transaxle.
Bank 2 refers to the bank that does not include the No. 1 cylinder.
DTC P0014, P0015, P0024 or P0025 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain stored even if the system returns to normal after a short time. Those foreign objects may then be captured by the oil filter.
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

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

Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Read the DTCs.

Result
Result	Proceed to
DTC P0014, P0015, P0024 or P0025 is output	A
DTC P0014, P0015, P0024 or P0025 and other DTCs are output	B

Tech Tips

If any DTCs other than P0014, P0015, P0024 or P0025 are output, troubleshoot those DTCs first.

GO TO DTC CHART Click here

PERFORM ACTIVE TEST USING GTS (CONTROL THE VVT EXHAUST LINEAR)

Connect the GTS to the DLC3.
Start the engine.
Turn the GTS on.
Turn the A/C switch on.
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 camshaft timing oil control valve assembly (for exhaust camshaft) using the GTS.

OK
GTS Operation	Engine Condition
0%	Normal engine speed
100%	Engine idles roughly or stalls

Tech Tips

Refer to "Data List / Active Test" [VVT Ex OCV Duty #1, VVT Ex Chg Angle #1, VVT Ex OCV Duty #2 and VVT Ex Chg Angle #2] Click here.

CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH) Click here

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

Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTCs Click here.
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG).
Turn the GTS on.
Start the engine and warm it up.
Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.

Read the pending DTCs.

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

Tech Tips

DTC P0014, P0015, P0024 or P0025 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain stored even if the system returns to normal after a short time. Those foreign objects may then be captured by the oil filter.

CHECK FOR INTERMITTENT PROBLEMS Click here

CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)

Remove the cylinder head cover sub-assemblies RH and LH Click here.
Turn the crankshaft pulley, and align its groove with the "0" timing mark of the timing chain cover.

Check that the timing marks of the camshaft timing gear assemblies and camshaft timing exhaust gear assemblies are aligned with the timing marks of the bearing cap as shown in the illustration.

Tech Tips

If the timing marks are not as shown, turn the crankshaft one revolution clockwise.

OK
The timing marks on the camshaft timing gear assemblies and camshaft timing exhaust gear assemblies are aligned as shown in the illustration.

Text in Illustration
*1	Timing Mark

ADJUST VALVE TIMING Click here

INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT)
1. Inspect the camshaft timing oil control valve assembly (for exhaust camshaft) Click here.
NG
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT) Click here

OK

INSPECT OIL CONTROL VALVE FILTER AND OIL PIPE

Text in Illustration
*1	Bank 1
*2	Bank 2
*a	Oil Pipe
*b	No. 1 Oil Pipe

Remove the oil pipe or No. 1 oil pipe Click here.

Remove the oil control valve filter RH or oil control valve filter LH.
Check that the oil control valve filter and oil pipe are not clogged.

OK

The oil control valve filter or oil pipe is not clogged.

OK
The oil control valve filter or oil pipe is not clogged.

REPLACE OIL CONTROL VALVE FILTER OR OIL PIPE Click here

REPLACE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY
1. Replace the camshaft timing exhaust gear assembly (bank 1 or bank 2) Click here.
  
  Tech Tips
  
  Perform "Inspection After Repair" after replacing the camshaft timing exhaust gear assembly Click here.
NEXT

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

Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTCs Click here.
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG).
Turn the GTS on.
Start the engine and warm it up.
Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.

Read the pending DTCs.

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

END

REPLACE ECM Click here