Toyota Tundra. Manual — part 1197

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VV1 + and VV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.

WAVEFORM REFERENCE

MONITOR DESCRIPTION

If no signal is transmitted by the VVT sensor despite the engine revolving, or the rotations of the camshaft and
the crankshaft are not synchronized, the ECM interprets this as a malfunction of the sensor.

MONITOR STRATEGY

MONITOR STRATEGY

Item

Content

Terminal

NE+ - NE-

VV1+ - VV1-
VV2+ - VV2-

Equipment Setting 5 V/DIV. 20 msec./DIV.

Condition

Cranking or idling

Related DTCs

P0340: VVT sensor (Bank 1) range check
P0340: Camshaft position/Crankshaft position misalignment (Bank 1)
P0340: VVT sensor (Bank 1) range check (fluctuating)
P0342: VVT sensor (Bank 1) range check (low voltage)
P0343: VVT sensor (Bank 1) range check (high voltage)
P0345: VVT sensor (Bank 2) range check (while starting engine)
P0345: VVT sensor (Bank 2) range check (after starting engine)
P0345: VVT sensor (Bank 2) range check (fluctuating)
P0347: VVT sensor (Bank 2) range check (low voltage)
P0348: VVT sensor (Bank 2) range check (high voltage)

Required
Sensors/Components
(Main)

VVT sensors (Banks 1 and 2)

Required
Sensors/Components
(Related)

Crankshaft position sensor

Frequency of Operation

Continuous

Duration

4 seconds:
P0340 (VVT sensor (Bank 1) range check and VVT sensor (Bank 1) range
check [fluctuating]), P0342, P0343 and P0345 (VVT sensor range check
[while starting engine])
5 seconds:
Others

MIL Operation

2 driving cycles: P0340 (cranking), P0345 (cranking)
MIL Operation P0340 (VVT sensor range check), P0345 (VVT sensor range
check [while starting engine])
Immediate: Others

Sequence of Operation

None

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

TYPICAL ENABLING CONDITIONS

All:

TYPICAL ENABLING CONDITIONS

VVT Sensor Range Check:

TYPICAL ENABLING CONDITIONS

Camshaft Position/Crankshaft Position Misalignment:

TYPICAL ENABLING CONDITIONS

VVT Sensor Range Check (Fluctuating, Low voltage, High voltage)

TYPICAL ENABLING CONDITIONS

VVT Sensor Range Check (While starting engine)

TYPICAL ENABLING CONDITIONS

VVT Sensor Range Check (After starting engine)

TYPICAL ENABLING CONDITIONS

VVT Sensor Range Check (Fluctuating, Low voltage, High voltage)

TYPICAL ENABLING CONDITIONS

Monitor runs whenever following DTCs are not present

None

Starter

ON

Minimum battery voltage while starter ON

Less than 11 V

Engine RPM

600 RPM or more

Starter

OFF

Starter

OFF

Ignition switch ON and time after ignition switch changed from OFF to ON

2 seconds or more

Starter

ON

Battery voltage while starter ON once at least

Less than 11 V

Engine RPM

600 RPM or more

Starter

OFF

Battery voltage

8 V or more

Ignition switch

ON

Starter

OFF

Ignition switch ON and time after ignition switch changed from OFF to ON

2 seconds or more

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

TYPICAL MALFUNCTION THRESHOLDS

VVT Sensor Range Check:

TYPICAL MALFUNCTION THRESHOLDS

Camshaft Position/Crankshaft Position Misalignment:

TYPICAL MALFUNCTION THRESHOLDS

VVT Sensor Range Check (Fluctuating)

TYPICAL MALFUNCTION THRESHOLDS

VVT Sensor Range Check (Low voltage)

TYPICAL MALFUNCTION THRESHOLDS

VVT Sensor Range Check (High voltage)

TYPICAL MALFUNCTION THRESHOLDS

VVT Sensor Range Check (While starting engine)

TYPICAL MALFUNCTION THRESHOLDS

VVT Sensor Range Check (After starting engine)

TYPICAL MALFUNCTION THRESHOLDS

VVT Sensor Range Check (Fluctuating)

TYPICAL MALFUNCTION THRESHOLDS

Battery voltage

8 V or more

VVT sensor signal No signal

No signal

Camshaft position and crankshaft position phases

Misaligned

VVT sensor voltage

Less than 0.3 V, or more than 4.7 V

VVT sensor voltage

Less than 0.3 V

VVT sensor voltage

More than 4.7 V

VVT sensor signal

No signal

VVT sensor voltage

No signal

VVT sensor voltage

Less than 0.3 V, or more than 4.7 V

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

VVT Sensor Range Check (Low voltage)

TYPICAL MALFUNCTION THRESHOLDS

VVT Sensor Range Check (High voltage)

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

COMPONENT OPERATING RANGE

WIRING DIAGRAM

Fig. 125: Camshaft Position Sensor Wiring Diagram

INSPECTION PROCEDURE

HINT:

Read freeze frame data using the Techstream. Freeze frame data records the engine condition when
malfunctions are detected. 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.

VVT sensor voltage

Less than 0.3 V

VVT sensor voltage

More than 4.7 V

VVT sensor voltage

0.3 to 4.7 V

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra