Toyota Corolla (E120): Circuit description

This circuit turns on the magnetic clutch inside the actuator during cruise control operation according to the signal from the ecu. If a malfunction occurs in the actuator or speed sensor, etc. During cruise control operation, the rotor shaft between the motor and control plate is released.

When the brake pedal is depressed, the stop lamp switch assy turns on, supplying electrical power to the stop light. Power supply to the magnetic clutch is mechanically cut and the magnetic clutch is turned off.

When driving downhill, if the vehicle speed exceeds the set speed by 8 km/h (5 mph), the ecu turns the safety magnet clutch off. If the vehicle speed later drops to within 5 km/h (3 mph) above the set speed, then cruise control at the set speed is resumed.

Wiring diagram

Wiring diagram

Inspection procedure

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    On–vehicle inspection
    1. Check fuel pump operation Connect the hand–held tester to the dlc3.  turn the ignition switch on and hand–held tester main switch on. Notice: do not start the engine.  select the active test mode on the hand–held tester.  please refer to the hand–held te ...

    Cruise control system
    On–vehicle inspection 1. Check play of accelerator auto drive cable assy Push the wire into the cable so as not to move the throttle link and put a mark on the position shown in the illustration. Pull the wire and check the moved distance of the mark. 2. Adjust play in acce ...

    Stopping
    ► Automatic transmission or continuously variable transmission 1 With the shift lever in D, depress the brake pedal. 2 If necessary, set the parking brake. If the vehicle is to be stopped for an extended period of time, shift the shift lever to P or N. (, 174, 176) ►  Manual ...