Toyota Corolla (E120): Circuit description

When the brake pedal is depressed, the stop lamp switch assy sends a signal to the cruise control ecu assy.

When the cruise control ecu assy receives this signal, it cancels the cruise control.

A fail–safe function is provided so that cancel functions normally, even if there is a malfunction in the stop light switch circuit.

The cancel conditions are: battery positive voltage at terminal stp–.

When the brake pedal is depressed, normal battery positive voltage normally is applied through the stop fuse and stop lamp switch assy to terminal stp– of the cruise control ecu assy, and the cruise control ecu assy turns the cruise control to off.

If the harness connected to terminal stp– has an open circuit, terminal stp– will have battery positive voltage and the cruise control will be turned off.

Also, when the brake pedal is depressed, the magnetic clutch circuit is cut mechanically by the stop lamp switch assy, turning the cruise control off.

Wiring diagram

Inspection procedure

    Share this page:

    Other materials:

    Overhaul
    1. Drain clutch fluid 2. Remove brake master cylinder sub–assy 3. Remove brake booster assy 4. Disconnect clutch reservoir tube Loosen the clip and disconnect the clutch reservoir tube from the clutch master cylinder assy. Hint: use a container to catch the fluid. 5. Disconnect ...

    Radio receiver assy
    Replacement Рint: components: 1. Remove floor shift shift lever knob sub–assy (m/t transaxle) 2. Remove console panel upper 3. Remove heater control knob 4. Remove instrument cluster finish panel 5. Remove instrument cluster finish panel sub–assy center Remove the 4 screws. & ...

    Handling of hose clamps
    Before removing the hose, check the depth of the inserting portion and the clamp position in order to restore it surely.  change a deformed or dented clamp for a new one.  in case of reusing the hose, install the clamp on the hose where it has a clamp track.  for a ...