Toyota Tundra. Manual — part 1514

Standard resistance

RESISTANCE SPECIFIED CONDITION

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE ECM (See REMOVAL )

DTC P0014 CAMSHAFT POSITION "B" - TIMING OVER-ADVANCED OR SYSTEM
PERFORMANCE (BANK 1); DTC P0015 CAMSHAFT POSITION "B" - TIMING OVER-RETARDED
(BANK 1); DTC P0024 CAMSHAFT POSITION "B" - TIMING OVER-ADVANCED OR SYSTEM
PERFORMANCE (BANK 2); DTC P0025 CAMSHAFT POSITION "B" - TIMING OVER-RETARDED
(BANK 2)

DESCRIPTION

HINT:

If DTC P0014, P0015, P0024 or P0025 is present, check the VVT (Variable Valve Timing) system. The
Variable Valve Timing (VVT) system includes the ECM, OCV and VVT controller. The ECM sends a target
duty-cycle control signal to the OCV. This control signal regulates the oil pressure supplied to the VVT
controller. Camshaft timing control is performed according to engine operating conditions such as the intake air
volume, throttle valve position and engine coolant temperature. The ECM controls the OCV based on the
signals transmitted by several sensors. The VVT controller regulates the exhaust camshaft angle using oil
pressure through the OCV. As a result, the relative positions of the camshaft and crankshaft are optimized, the
engine torque and fuel economy improve, and the exhaust emissions decrease under overall driving conditions.
The ECM detects the actual exhaust valve timing using signals from the camshaft and crankshaft position
sensors, and performs feedback control. This is how the target exhaust valve timing is verified by the ECM.

Tester Connection

Condition Specified Condition

D44-1 - D74-56 (OE1+)

Always

Below 1 ohms

D44-2 - D74-55 (OE1-)

Always

Below 1 ohms

D45-1 - D74-50 (OE2+)

Always

Below 1 ohms

D45-2 - D74-49 (OE2-)

Always

Below 1 ohms

D44-1 or D74-56 (OE1+) - Body ground Always

10 kohms or higher

D44-2 or D74-55 (OE1-) - Body ground

Always

10 kohms or higher

D45-1 or D74-50 (OE2+) - Body ground Always

10 kohms or higher

D45-2 or D74-49 (OE2-) - Body ground

Always

10 kohms or higher

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Fig. 48: Camshaft Position System Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE CHART

MONITOR DESCRIPTION

1. 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.

2. 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 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 the VVT controller stuck malfunction and stores a
DTC.

Example:

A DTC is stored when the following conditions 1 and 2 are met for 10 seconds or more:

DTC

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 camshaft



OCV filter



Camshaft timing exhaust
gear



ECM

P0015
P0025

Exhaust valve timing is not
adjusted in valve timing retard
range (1 trip detection logic)



Valve timing



OCV for exhaust camshaft



OCV filter



Camshaft timing exhaust
gear



ECM

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

1. The difference between the target and actual exhaust valve timing is more than 5°CA (Crankshaft

Angle) and the condition continues for more than 5 seconds.

2. It takes 5 seconds or more to change the valve timing by 5°CA.

3. DTCs P0014 and P0024 (Advanced Cam Timing) are subject to 2 trip detection logic.

4. 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.

5. The monitor will not run unless the following conditions are met:

a. The engine is warm (the engine coolant temperature is 75°C [167°F] or more).

b. The vehicle has been driven at more than 64 km/h (40 mph) for 3 minutes.

c. The engine has idled for 3 minutes.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

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

Frequency of operation

Once per driving cycle

Duration

Within 10 seconds

MIL operation

Advanced camshaft timing: 2 driving cycles
Retarded camshaft timing: Immediate

Sequence of operation

None

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 Sensor)
P0115, P0117, P0118 (Engine Coolant Temperature
Sensor)
P0125 (Insufficient Coolant Temperature for Closed Loop
Fuel Control)
P0335 (Crankshaft Position Sensor)
P1340 (Camshaft Position Sensor)

Battery voltage

11 V or more

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

TYPICAL MALFUNCTION THRESHOLDS

Advanced camshaft timing:

TYPICAL MALFUNCTION THRESHOLDS - ADVANCED CAMSHAFT TIMING

Retarded camshaft timing:

RETARDED CAMSHAFT TIMING REFERENCE

WIRING DIAGRAM

Refer to DTC P0013 .

INSPECTION PROCEDURE

HINT:

ADVANCED TIMING OVER REFERENCE



If DTC P0014 or P0015 is displayed, check the bank 1 VVT system for exhaust camshaft circuit.



Bank 1 refers to the bank that includes No. 1 cylinder.



If DTC P0024 or P0025 is displayed, check the bank 2 VVT system for exhaust camshaft circuit.



Bank 2 refers to the bank that does not include 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 (see DTC CHECK/CLEAR ).

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

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch to ON and turn the Techstream ON.

Engine speed

500 to 4000 RPM

Engine coolant temperature

75 to 100°C (167 to 212°F)

Valve timing

No change

Valve timing

Advanced position

Valve timing

No change

Valve timing

Retarded position

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

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra