Toyota Tundra. Manual — part 1308

The wavelength becomes shorter as engine RPM increases.

Fig. 21: Igniter IGT Signal (From ECM To Igniter) & Igniter IGF Signal (From Igniter To
ECM) - Waveform Graph

h. WAVEFORM 7:

Purge VSV

PURGE VSV - WAVEFORM REFERENCE

HINT:

If the waveform is not similar to the illustration, check the waveform again after idling for 10
minutes or more.

Fig. 22: Purge VSV - Waveform Graph

i. WAVEFORM 8:

Item

Content

Terminal No. (Symbols)

Between PRG and E1

Tool Setting

10 V/DIV., 10 to 100 msec./DIV.

Condition

Idling

2008 Toyota Tundra

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

Vehicle speed signal

VEHICLE SPEED SIGNAL - WAVEFORM REFERENCE

HINT:

The wavelength becomes shorter as the vehicle speed increases.

Fig. 23: Vehicle Speed Signal - Waveform Graph

j. WAVEFORM 9:

Throttle actuator positive terminal

THROTTLE ACTUATOR POSITIVE TERMINAL - WAVEFORM REFERENCE

HINT:

The duty ratio varies depending on the throttle actuator operation.

Item

Content

Terminal No. (Symbols)

Between SPD and E1

Tool Setting

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

Condition

Driving at 20 km/h (12 mph)

Item

Content

Terminal No. (Symbols) Between M+ and ME01

Tool Setting

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

Condition

Idling with warm engine

2008 Toyota Tundra

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

Fig. 24: Throttle Actuator Positive Terminal - Waveform Graph

k. WAVEFORM 10:

Throttle actuator negative terminal

THROTTLE ACTUATOR NEGATIVE TERMINAL - WAVEFORM REFERENCE

HINT:

The duty ratio varies depending on the throttle actuator operation.

Fig. 25: Throttle Actuator Negative Terminal - Waveform Graph

l. WAVEFORM 11:

Engine speed signal

ENGINE SPEED SIGNAL - WAVEFORM REFERENCE

Item

Content

Terminal No. (Symbols) Between M- and ME01

Tool Setting

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

Condition

Idling with warm engine

Item

Content

Terminal No. (Symbols) Between TACH and E1

Tool Setting

5 V/DIV., 10msec./DIV.

Condition

Idling

2008 Toyota Tundra

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

HINT:

The wavelength becomes shorter as the engine RPM increases.

Fig. 26: Engine Speed Signal - Waveform Graph

m. WAVEFORM 12:

CAN communication signal

CAN COMMUNICATION SIGNAL - WAVEFORM REFERENCE

HINT:

The waveform varies depending on the CAN communication signal.

Fig. 27: CAN Communication Signal - Waveform Graph

n. WAVEFORM 13:

CAN communication signal

Item

Content

Terminal No. (Symbols)

Between CANH and E1

Tool Setting

1 V/DIV., 10 µsec./DIV.

Condition

Engine stops and ignition switch ON

2008 Toyota Tundra

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