Toyota Corolla (E120): Circuit description

The purpose of this circuit is to prevent the engine from stalling while driving in lock–up condition, when brakes are suddenly applied.

When the brake pedal is depressed, this switch sends a signals to the ecm. Then the ecm cancels the operation of the lock–up clutch while braking is in progress.

Monitor description

Monitor description

The circuit prevents the engine from stopping when the vehicle is stopped by sudden braking when the torque converter clutch is in the ”lock–up” mode. The ecm receives the signal from the stop light switch at the time brake pedal is depressed. Then, the ecm sends the signal to the lock–up solenoid valve not to be in lock–up condition. When the stop light switch remains on during ”stop and go” driving, the ecm interprets this as a fault in the stop light switch and the mil comes on. The vehicle must stop and go (3 km/h (2 mph) to 30 km/h (19 mph)) ten times for two driving cycles in order to detect malfunction.

Monitor strategy

Typical enabling condition

Typical enabling condition

Typical malfunction thresholds

Typical malfunction thresholds

Wiring diagram

Wiring diagram

Inspection procedure

    Share this page:

    Other materials:

    Foamed material application areas
    If an increase in temperature or other condition damages the foamed material when repairing or replacing the panel, fill in the insufficient areas with urethane foam. The following illustration shows the areas for one side, but the foamed material must be applied equally to both the left and r ...

    Turn signal lever
    Operating instructions Right turn Lane change to the right (move the lever partway and release it) The right hand signals will flash 3 times. Lane change to the left (move the lever partway and release it) The left hand signals will flash 3 times. Left turn ■Turn signals can be oper ...

    Maintenance data (fuel, oil level, etc.)
    Dimensions and weight *1:Unladen vehicles *2:Vehicles without 18-inch tires *3:Vehicles with 18-inch tires for Guam and Saipan *4:Vehicles with 18-inch tires except for Guam and Saipan *5:For Guam and Saipan Seating capacity Vehicle identification ■ Vehicle identification number The vehicle iden ...