Toyota Tundra. Manual — part 1195
DTC TROUBLE DETECTION CONDITION CHART
Reference: Inspection using an oscilloscope.
Fig. 119: Identifying VV1, VV2 & NE Signal Waveforms
HINT:
The correct waveform is as shown.
VV1+ and VV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.
Grounding failure of the shielded wire may cause noise in waveforms.
WAVEFORM REFERENCES
DTC
No.
DTC Detection Condition
Trouble Area
P0335
When either condition below is met:
No CKP sensor signal to ECM while cranking (1 trip
detection logic)
No CKP sensor signal to ECM at engine speed of 600 RPM
or more (1 trip detection logic)
Open or short in CKP
sensor circuit
CKP sensor
CKP sensor plate
ECM
P0339
Under conditions (a), (b) and (c), no CKP sensor signal to ECM for
0.05 seconds or more (1 trip detection logic):
a. Engine speed 1000 RPM or more
b. Starter signal OFF
c. 3 seconds or more have elapsed since starter signal switched
from ON to OFF
Open or short in CKP
sensor circuit
CKP sensor
CKP sensor plate
ECM
Item
Content
Terminal
VV1+ - VV1-
VV2+ - VV2-
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
MONITOR DESCRIPTION
If there is no signal from the CKP sensor despite the engine revolving, the ECM interprets this as a malfunction
of the sensor.
If the malfunction is not repaired successfully, a DTC is set 10 seconds after the engine is next started.
MONITOR STRATEGY
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
TYPICAL ENABLING CONDITIONS
Case 1:
TYPICAL ENABLING CONDITIONS
Case 2:
TYPICAL ENABLING CONDITIONS
NE+ - NE-
Equipment Setting 5 V/DIV., 20 msec./DIV.
Condition
Cranking or idling
Related DTCs
P0335: CKP sensor range check or rationality
Required Sensors/Components (Main)
CKP sensor
Required Sensors/Components (Related)
VVT sensor
Frequency of Operation
Continuous
Duration
3 times
MIL Operation
Immediate
Sequence of Operation
None
Monitor runs whenever following DTCs not present
None
Time after starter OFF to ON
0.3 seconds or more
Number of VVT sensor signal pulse
6 times
Battery voltage
7 V or more
Ignition switch
ON
Starter
OFF
Engine speed
600 RPM or more
Time after starter from ON to OFF
3 seconds or more
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
TYPICAL MALFUNCTION THRESHOLDS
Case 1:
TYPICAL MALFUNCTION THRESHOLDS
Case 2:
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
COMPONENT OPERATING RANGE
WIRING DIAGRAM
Fig. 120: Crankshaft Position Sensor Wiring Diagram
INSPECTION PROCEDURE
HINT:
If no problem is found through this diagnostic troubleshooting procedure, troubleshoot the engine
mechanical systems.
Check the engine speed. The engine speed can be checked by using the Techstream. To check, follow the
operation below:
a. Connect the Techstream to the DLC3.
b. Start the engine.
c. Turn the Techstream ON.
Number of CKP sensor signal pulse
132 or less, and 174 or more
Engine speed signal
No signal
CKP sensor
CKP sensor output voltage fluctuates while crankshaft revolving
34 CKP sensor signals per crankshaft revolution
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
d. Enter the following menus: Powertrain/Engine and ECT/Data List/All Data/Engine Speed. The
engine speed may be indicated as zero despite the engine revolving normally. This is caused by a
lack of NE signals from the Crankshaft Position (CKP) sensor. Alternatively, the engine speed may
be indicated as lower than the actual engine speed if the CKP sensor output voltage is insufficient.
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.
1. READ VALUE USING TECHSTREAM (ENGINE SPEED)
a. Connect the Techstream to the DLC3.
b. Turn the ignition switch ON.
c. Turn the Techstream ON.
d. Enter the following menus: Powertrain/Engine and ECT/Data List/All Data/Engine Speed.
e. Start the engine.
f. Read the values displayed on the Techstream while the engine is running.
Standard:
Correct values are displayed.
HINT:
To check the engine speed change, display the graph on the Techstream.
If the engine does not start, check the engine speed while cranking.
If the engine speed indicated on the Techstream remains at zero (0), there may be an open or
short in the Crankshaft Position (CKP) sensor circuit.
NG : Go to step 2
OK : CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT
PROBLEMS )
2. INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE)
a. Disconnect the D4 Crankshaft Position (CKP) sensor connector.
b. Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION
Tester Connection Condition Specified Condition
1 - 2
Cold
985 to 1600 ohms
1 - 2
Hot
1265 to 1890 ohms
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
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