Corolla CE Sedan 4-Door L4-1587cc 1.6L DOHC MFI (1997)
Ignition Key In Signal: Testing and Inspection
Diagnostic Procedures
IGNITION SWITCH CIRCUIT
CIRCUIT DESCRIPTION
When the ignition switch is turned to the ACC position, battery positive voltage is applied to the terminal ACC of the ECU. Also, if the ignition switch is
turned to the ON position, battery positive voltage is applied to the terminals ACC and IG of the ECU.
When the battery positive voltage is applied to the terminal ACC of the ECU while the theft deterrent system is activated, the warning stops.
Furthermore, power supplied from the terminals ACC and IG of the ECU is used as power for the door courtesy switch, and position switch, etc.
Ignition Switch Circuit (With Theft Deterrent System)
WIRING DIAGRAM
Inspection Procedure / Ignition Switch Circuit (1 Of 2)
