Toyota Corolla (E120): Circuit description

When driving uphill under cruise control, in order to reduce the number of shifting due to on–off overdrive operation and to provide smooth driving, when down shifting in the electronically controlled transmission occurs, a signal to prevent upshift until the end of the uphill slope is sent from the cruise control ecu assy to the electronically controlled transmission.

Terminal ect of the cruise control ecu assy detects the shift change signal (output to electronically controlled transmission no.2 Solenoid) from the ecm.

If the vehicle slows down, also when terminal ect of the cruise control ecu assy receives down shifting signal, it sends a signal from terminal od to ecm to cut overdrive until the end of the uphill slope, and the number of gear shifts are reduced and gear shift points in the electronically controlled transmission are changed.

Wiring diagram

Inspection procedure

    Share this page:

    Other materials:

    Steering wheel audio switches
    Some audio features can be controlled using the switches on the steering wheel. Operation may differ depending on the type of multimedia system or navigation system. For details, refer to the manual provided with the multimedia system or navigation system. Operating the multimedia system using ...

    Cargo and luggage
    Take notice of the following information about storage precautions, cargo capacity and load: Capacity and distribution Cargo capacity depends on the total weight of the occupants. (Cargo capacity) = (Total load capacity) - (Total weight of occupants) Steps for Determining Correct Load Limit - (1) L ...

    Overhaul
    1. Precaution 2. Disconnect battery negative terminal 3. Inspect place front wheels facing straight ahead 4. Remove horn button assy Notice: if the airbag connector is disconnected with the ignition switch being at on, dtcs will be recorded.  using a torx socket wrench, loosen the ...