Toyota Tundra. Manual — part 1133

WAVEFORM REFERENCE 5

HINT:

The wavelength becomes shorter as the engine RPM increases.

Fig. 21: Identifying Waveform 5 Reference

6. WAVEFORM 6

a. Igniter IGT signal (from ECM to igniter)

b. Igniter IGF signal (from igniter to ECM)

WAVEFORM REFERENCE 6

HINT:

The wavelength becomes shorter as the engine RPM increases.

ECM Terminal Name

a. Between NE+ and NE-

b. Between VV1+ and VV1- or VV2+ and VV2-

Tester Range

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

Condition

Idling

ECM Terminal Name

a. Between IGT (1 to 6) and E1

b. Between IGF1 and E1

Tester Ranges

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

Condition

Idling

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Fig. 22: Identifying Waveform 6 Reference

7. WAVEFORM 7

Purge VSV

WAVEFORM REFERENCE 7

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 Reference

8. WAVEFORM 8

Vehicle speed signal

WAVEFORM REFERENCE 8

ECM Terminal Name Between PRG and E1

Tester Range

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

Condition

Idling

ECM Terminal Name Between SPD and E1

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

HINT:

The wavelength becomes shorter as the vehicle speed increases.

Fig. 24: Identifying Waveform 8 Reference

9. WAVEFORM 9

Throttle actuator positive terminal

WAVEFORM REFERENCE 9

HINT:

The duty ratio varies depending on the throttle actuator operation.

Fig. 25: Identifying Waveform 9 Reference

10. WAVEFORM 10

Throttle actuator negative terminal

Tester Range

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

Condition

Ignition switch ON, Rotate driving wheel slowly

ECM Terminal Name Between M+ and ME01

Tester Range

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

Condition

Idling with warm engine

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

WAVEFORM REFERENCE 10

HINT:

The duty ratio varies depending on the throttle actuator operation.

Fig. 26: Identifying Waveform 10 Reference

11. WAVEFORM 11

Engine speed signal

WAVEFORM REFERENCE 11

HINT:

The wavelength becomes shorter as the engine RPM increases.

Fig. 27: Identifying Waveform 11 Reference

12. WAVEFORM 12

ECM Terminal Name Between M- and ME01

Tester Range

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

Condition

Idling with warm engine

ECM Terminal Name Between TACH and E1

Tester Range

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

Condition

Idling

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra