Toyota Tundra (2015 year). Manual — part 1104
DTC
NO.
DTC DETECTION CONDITION
TROUBLE AREA
P0014
P0024
Exhaust valve timing is not adjusted in valve
timing advance range
(2 trip detection logic)
Valve timing
Oil control valve (OCV) (for exhaust side
Camshaft timing exhaust gear assembly
ECM
P0015
P0025
Exhaust valve timing is not adjusted in valve
timing retard range
(1 trip detection logic)
Valve timing
Camshaft timing exhaust gear assembly
ECM
MONITOR DESCRIPTION
The ECM optimizes the exhaust valve timing using the VVT (Variable Valve Timing) system to control
the exhaust camshaft. The VVT system includes the ECM, Oil Control Valve (OCV) and VVT controller.
1.
The ECM sends a target duty-cycle control signal to the OCV. This control signal regulates the oil
pressure supplied to the VVT controller. The VVT controller can advance or retard the exhaust
2.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0014,P0015,...
camshaft.
If the difference between the target and actual exhaust valve timing is large, and changes in
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 1 and 2 are met:
1. It takes 5 seconds or more to change the valve timing by 5°CA.
2. After the above condition 1 is met, the camshaft timing oil control valve is forcibly activated
for 10 seconds.
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 OCV malfunctions or the presence of
foreign objects in the OCV.
MONITOR STRATEGY
Related DTCs
P0014: Advanced camshaft timing (for Bank 1)
P0015: Retarded camshaft timing (for Bank 1)
P0024: Advanced camshaft timing (for Bank 2)
P0025: Retarded camshaft timing (for Bank 2)
Required sensors/Components
(Main)
VVT OCV and VVT Actuator
Required sensors/Components
(Related)
Crankshaft position sensor, Camshaft position sensor and Engine coolant
temperature sensor
Duration
Within 10 seconds
MIL operation
Advanced camshaft timing: 2 driving cycles
Retarded camshaft timing: Immediate
TYPICAL ENABLING CONDITIONS
Monitor runs whenever following DTCs are not
present
P0013, P0023 (Exhaust VVT oil control valve)
P0017, P0019 (Exhaust VVT system - Misalignment)
P0102, P0103 (Mass air flow meter)
P0107, P0108 (Manifold absolute pressure)
P0115, P0117, P0118 (Engine coolant temperature sensor)
P0125 (Insufficient coolant temperature for closed loop fuel
control)
P0335, P0337, P0338 (Crankshaft position sensor)
P0340, P0365, P1340 (Camshaft position sensor)
P0342, P0343, P0345, P0347, P0348 (VVT sensor)
P0367, P0368, P0390, P0392, P0393 (Exhaust VVT sensor)
Battery voltage
11 V or more
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0014,P0015,...
Engine RPM
500 to 4000 rpm
Engine coolant temperature
75 to 100°C (167 to 212°F)
TYPICAL MALFUNCTION THRESHOLDS
Advanced Camshaft Timing
Both conditions are met:
-
More than 5°CA (Crankshaft Angle) for 5 seconds or more after the VVT
hold duty ratio learned value reaches the upper or lower limit.
Valve timing
No change at advanced valve timing
Retarded Camshaft Timing
Both conditions are met:
-
More than 5°CA (Crankshaft Angle) for 5 seconds or more after the VVT
hold duty ratio learned value reaches the upper or lower limit.
Valve timing
No change at retarded valve timing
CONFIRMATION DRIVING PATTERN
Connect the Techstream to the DLC3.
1.
Turn the ignition switch to ON and turn the Techstream on.
2.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).
3.
Turn the ignition switch off and wait for at least 30 seconds.
4.
Turn the ignition switch to ON and turn the Techstream on [A].
5.
Start the engine and warm it up until the ECT reaches 75°C (167°F) or higher [B].
6.
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.
7.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0014,P0015,...
Idle the engine for 3 minutes or more [D].
8.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [E].
9.
Read the pending DTCs.
HINT:
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
10.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
11.
Input the DTC: P0014, P0015, P0024 or P0025.
12.
Check the DTC judgment result.
TECHSTREAM
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
HINT:
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].
13.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
Depress the accelerator pedal by a target amount.
14.
Idle the engine for 3 minutes or more [G].
15.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [H].
16.
Read the pending DTCs.
HINT:
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
17.
Check the DTC judgment result again.
HINT:
If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
18.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0014,P0015,...
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