toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Engine Controls - Techstream(R) ECU Re-Flash Procedure|Page 3604 > < Engine Controls - Techstream(R) ECU Re-Flash Procedure|Page 3602
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HINT: The wavelength becomes shorter as the engine rpm increases.

(g) WAVEFORM 7

(1) Purge VSV for EVAP system operation signal

HINT: If the waveform is not similar to that shown in the illustration, check the waveform again after idling for 10 minutes or more.

(h) WAVEFORM 8

(1) Vehicle speed signal

HINT:
-

The wavelength becomes shorter as the vehicle speed increases.

-

Depending on the vehicle, the output waveform voltage may rise to 12 V if influenced by optionally installed systems.

(i) WAVEFORM 9

(1) Throttle drive motor operation signal (positive terminal)

HINT: The duty ratio varies depending on the throttle actuator operation.

(j) WAVEFORM 10

Engine Controls - Techstream(R) ECU Re-Flash Procedure|Page 3604 > < Engine Controls - Techstream(R) ECU Re-Flash Procedure|Page 3602