Toyota Tundra. Manual — part 1371

Reference: Inspection using an oscilloscope.

Fig. 124: Signal Waveforms Graph

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 REFERENCE

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 450
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-

NE+ - NE-

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-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 - ALL

Case 1:

TYPICAL ENABLING CONDITIONS - CASE 1

Case 2:

TYPICAL ENABLING CONDITIONS - CASE 2

Equipment Setting

2 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)

CMP 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 CMP sensor signal pulse

6 times

Battery voltage

7 V or higher

CMP sensor circuit failure

Not detected

Ignition switch

ON

Starter

OFF

Engine speed

450 RPM or more

Time after starter from ON to OFF

3 seconds or more

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

TYPICAL MALFUNCTION THRESHOLDS

Case 1:

TYPICAL MALFUNCTION THRESHOLDS - CASE 1

Case 2:

TYPICAL MALFUNCTION THRESHOLDS - CASE 2

COMPONENT OPERATING RANGE

COMPONENT OPERATING RANGE

WIRING DIAGRAM

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 (2UZ-FE) - Tundra

Fig. 125: 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.

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

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra