Toyota Corolla (E120): Circuit description

The cruise control ecu assy power source supplies power to the actuator and sensors, etc., When terminal gnd and the case of the cruise control ecu assy are grounded.

Wiring diagram

Inspection procedure

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    Circuit description
    When the ignition switch is turned on, battery positive voltage is applied to the coilwhich closes the contacts of the efi main relay (marked: efi) and supplies power to terminal +b of the ecm. This signal causes current to flow to the coil, closing the contacts of the efi relay and supplyin ...

    If the shift lever cannot be shifted from P (except vehicles with a manual transmission)
    If the shift lever cannot be shifted with your foot on the brake pedal, there may be a problem with the shift lock system (a system to prevent accidental operation of the shift lever). Have the vehicle inspected by your Toyota dealer immediately. The following steps may be used as an emergency ...

    Shift lock system (atm)
    On–vehicle inspection 1. Check shift lock operation  shift the shift lever to p position.  turn the ignition switch to lock.  check that the shift lever cannot be shifted to any other positions other than p.  turn the ignition switch to on, depress the brake pedal ...