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:

    Starting the engine
    1 Check that the parking brake is set. ► Vehicles without a multi-information display 2 Continuously variable transmission: Check that the shift lever is set in P. Firmly depress the brake pedal. Manual transmission: Check that the shift lever is set in N. Firmly depress the clutch peda ...

    Calibrating the compass
    The direction display deviates from the true direction determined by the earth’s magnetic field. The amount of deviation varies according to the geographic position of the vehicle. If you cross over a map boundary shown in illustration, the compass will deviate. To obtain higher precision or ...

    Valve clearance
    Adjustment 1. Remove cylinder head cover no.2 Remove the 2 nuts, 2 clips and cylinder head cover. 2. Disconnect engine wire Remove the 5 clamps from the 5 clamp brackets. Disconnect the 4 ignition coil connectors. Remove the bolt and nut installing the engine wire ...