Toyota Tundra. Manual — part 1486

HINT:

The wavelength becomes shorter as engine speed increases.

h. WAVEFORM 7:

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. 23: Identifying Waveform 7
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

i. WAVEFORM 8:

Vehicle speed signal

WAVEFORM REFERENCE

HINT:

The wavelength becomes shorter as the vehicle speed increases.

(a) D74-36 (IGT6) - D74-81 (E1) 2 V/DIV., 20 msec./DIV.

Idling

(a) D74-38 (IGT7) - D74-81 (E1) 2 V/DIV., 20 msec./DIV.

Idling

(a) D74-39 (IGT8) - D74-81 (E1) 2 V/DIV., 20 msec./DIV.

Idling

(b) D74-104 (IGF1) - D74-81 (E1) 2V/DIV., 20 msec./DIV.

Idling

(b) D74-105 (IGF2) - D74-81 (E1) 2 V/DIV., 20 msec./DIV.

Idling

Terminal No. (Symbols)

Tool Setting

Condition

D74-63 (PRG) - D74-81 (E1) 10 V/DIV., 10 to 100 msec./DIV.

Idling

Terminal No. (Symbols)

Tool Setting

Condition

A24-13 (SPD) - D74-81 (E1) 2 V/DIV., 20 msec./DIV. Driving at 20 km/h (12 mph)

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Fig. 24: Identifying Waveform 8
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

j. WAVEFORM 9:

Throttle actuator positive terminal

WAVEFORM REFERENCE

HINT:

The duty ratio varies depending on the throttle actuator operation.

Fig. 25: Identifying Waveform 9
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Terminal No. (Symbols)

Tool Setting

Condition

D74-19 (M+) - D74-82 (ME01) 5 V/DIV., 1 msec./DIV. Idling with warm engine

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

k. WAVEFORM 10:

Throttle actuator negative terminal

WAVEFORM REFERENCE

HINT:

The duty ratio varies depending on the throttle actuator operation.

Fig. 26: Identifying Waveform 10
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

l. WAVEFORM 11:

Engine speed signal

WAVEFORM REFERENCE

HINT:

The wavelength becomes shorter as the engine speed increases.

Terminal No. (Symbols)

Tool Setting

Condition

D74-18 (M-) - D74-82 (ME01) 5 V/DIV., 1 msec./DIV. Idling with warm engine

Terminal No. (Symbols)

Tool Setting

Condition

A24-15 (TACH) - D74-81 (E1) 5 V/DIV., 10 msec./DIV.

Idling

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Fig. 27: Identifying Waveform 11
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

m. WAVEFORM 12:

CAN communication signal

WAVEFORM REFERENCE

HINT:

The waveform varies depending on the CAN communication signal.

Fig. 28: Identifying Waveform 12
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

n. WAVEFORM 13:

CAN communication signal

WAVEFORM REFERENCE

Terminal No. (Symbols)

Tool Setting

Condition

A24-10 (CANH) - D74-81 (E1) 1 V/DIV., 10 µsec./DIV. Engine stops and ignition switch ON

Terminal No. (Symbols)

Tool Setting

Condition

A24-11 (CANL) - D74-81 (E1) 1 V/DIV., 10 µsec./DIV. Engine stops and ignition switch ON

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra