lexus Workshop Repair Guides

Lexus Workshop Service and Repair Manuals

Component Tests and General Diagnostics|Page 3017 > < Component Tests and General Diagnostics|Page 3015
Page 7
background image

(1) Igniter IGT signal (from ECM to igniter) and igniter IGF signal (from igniter to ECM)

HINT
The wavelength becomes shorter as the engine speed 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) Throttle actuator operation signal (positive terminal)

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

(i) WAVEFORM 9

Component Tests and General Diagnostics|Page 3017 > < Component Tests and General Diagnostics|Page 3015