Toyota 2GR-FE Manual page 393

Reference: Inspection using an oscilloscope
HINT:
• The correct waveform is as shown.
• VV1+ and VV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.
Item
Terminals
Equipment Settings
Conditions
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
Related DTCs
Required Sensors/Components (Main)
Required Sensors/Components (Sub)
Frequency of Operation
Duration
MIL Operation
Sequence of Operation
TYPICAL ENABLING CONDITIONS
All:
Monitor runs whenever following DTCs are not present
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
VV1, VV2 and NE Signal Waveforms
5 V/DIV.
NE
VV1
VV2
Content
NE+ - NE-
VV1+ - VV1-
VV2+ - VV2-
5 V/DIV.
20 ms./DIV.
Cranking or idling
GND
GND
GND
20 ms./DIV.
A107148E09
P0340: VVT sensor (Bank 1) open/short
P0340: VVT position/Crankshaft position misalignment (Bank 1)
P0342: VVT position sensor (Bank 1) range check (low voltage)
P0343: VVT position sensor (Bank 1) range check (high voltage)
P0345: VVT sensor (Bank 2) open/short
P0345: VVT position/Crankshaft position misalignment (Bank 2)
P0347: VVT position sensor (Bank 2) range check (low voltage)
P0348: VVT position sensor (Bank 2) range check (high voltage)
VVT position sensor (Bank 1 and 2)
Crankshaft position sensor
Continuous
5 seconds
2 driving cycles: P0340 (cranking), P0345 (cranking)
Immediate: Others
None
None
ES–237
ES