Testing and Inspection of Ignition Key In Signal for Highlander 4WD 2AZ-FE
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Ignition Key In Signal: Testing and Inspection
Ignition Switch Circuit
CIRCUIT DESCRIPTION
When the ignition switch is turned to the ACC position, battery positive voltage is applied to terminal ACC of the ECU. Also, if the ignition switch is
turned to the ON position, battery positive voltage is applied to terminals ACC and IG of the ECU. When the battery positive voltage is applied to
terminal ACC of the ECU while the theft deterrent system is operating, the warning stops. Furthermore, power supplied from terminals ACC and IG of
the ECU is used as power for the door courtesy switch and position switch, etc.
Wiring Diagram
Step 1