toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Engine Control Module|Testing and Inspection > < Engine Controls - Techstream(R) ECU Re-Flash Procedure|Page 3945
Page 10
background image

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

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

(k) WAVEFORM 11

(1) Engine speed signal

HINT: The wavelength becomes shorter as the engine rpm increases.

(l) WAVEFORM 12

(1) CAN communication signal

HINT: The wavelength varies depending on the CAN communication signal.

(m)WAVEFORM 13

(1) CAN communication signal

HINT: The wavelength varies depending on the CAN communication signal.

Engine Control Module|Testing and Inspection > < Engine Controls - Techstream(R) ECU Re-Flash Procedure|Page 3945