Toyota Tundra. Manual — part 1307

b. WAVEFORM 1:

Camshaft timing oil control valve (OCV)

CAMSHAFT TIMING OIL CONTROL VALVE - WAVEFORM REFERENCE

81 (E1)

system

D74-53 (ARP2)

- D74-81 (E1)

P-L - BR Air pump control

Ignition switch ON

11 to 14 V

D74-29 (AID2)

- D74-81 (E1)

G - BR

Diagnostic information
signal for air injection
system

Air injection system
operates

Pulse generation

(See o,

waveform 15)

A24-53 (AIP2)

- D74-97

(ETHW)

G - BR

Secondary air injection
system pressure signal

Ignition switch ON

3.0 to 3.6 V

D74-90 (G2) -
D74- 89 (G2-)

R - G

Camshaft position sensor Idling

Pulse generation

(See n,

waveform 14)

A24-18 (DI) -

D74-81 (E1)

L - BR

Fuel pump control

Ignition switch ON

0 to 3.0 V

A24-14

(STSW) - D74-

81 (E1)

BR - BR Starter switch

Shift lever position P or
N, Cranking

6.0 V or higher

A24-41

(ACCR) - D74-

81 (E1)

BR - BR ACC relay control signal

Ignition switch ON -->
Cranking

11 to 14 V -->

Below 1 V

D74-16

(STAR) - D74-

81 (E1)

L - BR

Starter relay control

Ignition switch ON

Below 1.5 V

Cranking

5.5 V or higher

D74-72 (PSP) -

D74-81 (E1)

G - BR

Power steering oil
pressure sensor

Ignition switch ON

0.5 to 4.5 V

HINT:
*: The ECM terminal voltage is constant regardless of the output voltage from the sensor.

Item

Content

Terminal No. (Symbols)

Between OC1+ and OC1-
Between OC2+ and OC2-

Tool Setting

5 V/DIV., 1 msec./DIV.

Condition

Idling

2008 Toyota Tundra

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

Fig. 16: Camshaft Timing Oil Control Valve - Waveform Graph

c. WAVEFORM 2:

Heated oxygen sensor

HEATED OXYGEN SENSOR - WAVEFORM REFERENCE

HINT:

In DATA LIST, item O2S B1 S2 shows the ECM input values from the heated oxygen sensor.

Fig. 17: Heated Oxygen Sensor - Waveform Graph

d. WAVEFORM 3:

Injector No. 1 (to No. 8) injection signal

INJECTOR NO. 1 (TO NO. 8) INJECTION SIGNAL - WAVEFORM REFERENCE

Item

Content

Terminal No.

(Symbols)

Between OX1B and EX1B
Between OX2B and EX2B

Tool Setting

0.2 V/DIV., 200 msec./DIV.

Condition

Engine speed maintained at 2500 RPM for 2 minutes after warming up

sensor

Item

Content

Terminal No. (Symbols) Between #10 (to #80) and E01

2008 Toyota Tundra

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

HINT:

The wavelength becomes shorter as the engine RPM increases.

Fig. 18: Injector No. 1 (To No. 8) Injection Signal - Waveform Graph

e. WAVEFORM 4:

Knock sensor

KNOCK SENSOR - WAVEFORM REFERENCE

HINT:



The wavelength becomes shorter as the engine RPM increases.



The waveforms and amplitudes displayed differ slightly depending on the vehicle.

Fig. 19: Knock Sensor - Waveform Graph

Tool Setting

20 V/DIV., 20 msec./DIV.

Condition

Idling

Item

Content

Terminal No. (Symbols)

Between KNK1 and EKNK

Between KNK2 and EKN2

Tool Setting

1 V/DIV., 1 msec./DIV.

Condition

Engine speed maintained at 4000 RPM after warming up engine

2008 Toyota Tundra

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

f. WAVEFORM 5:

Variable Valve Timing (VVT) sensor (for bank 1, 2) and Crankshaft position sensor

VARIABLE VALVE TIMING SENSOR AND CRANKSHAFT POSITION SENSOR -
WAVEFORM REFERENCE

HINT:

The wavelength becomes shorter as engine RPM increases.

Fig. 20: Variable Valve Timing Sensor (For Bank 1, 2) & Crankshaft Position Sensor -
Waveform Graph

g. WAVEFORM 6:

Igniter IGT signal (from ECM to igniter) and Igniter IGF signal (from igniter to ECM)

IGNITER IGT SIGNAL AND IGNITER IGF SIGNAL - WAVEFORM REFERENCE

HINT:

Item

Content

Terminal No. (Symbols)

CH1: Between VV1+ and VV1-
CH2: Between VV2+ and VV2-

CH3: Between NE+ and NE-

Tool Setting

2 V/DIV., 20 msec./DIV.

Condition

Idle after engine warmed-up

Item

Content

Terminal No. (Symbols)

a. Between IGT1 (to IGT8) and E1

b. Between IGF1 (IGF2) and E1

Tool Setting

2 V/DIV., 20 msec./DIV.

Condition

Idling

2008 Toyota Tundra

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