Toyota COROLLA2004 Electrical Wiring Diagram page 150

Cruise Control
System Outline
The current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW.
With the ignition SW turned to on, the current flows through the MAIN fuse to AM2 fuse to ignition SW (IG2) to TERMINAL 32
of the combination meter and the current through the ECU–IG fuse flows to TERMINAL 2 of the cruise control ECU.
When the ignition SW is on and the CRUISE SW is turned on, a signal is input from TERMINAL 2 of the cruise control SW to
TERMINAL 1 of the cruise control ECU. As a result, the cruise control ECU functions and the current flows from the ECU–IG
fuse to TERMINAL 2 of the cruise control ECU to TERMINAL 16 of the cruise control ECU to GROUND, and the cruise
control system is in a condition ready for operation.
At the same time, the current flows through the MAIN fuse to AM2 fuse to ignition SW (IG2) to TERMINAL 32 of the cruise
indicator light to TERMINAL 23 to TERMINAL 5 of the cruise control ECU to TERMINAL 16 to GROUND, causing the cruise
indicator light to light up, indicating that cruise control is ready for operation.
1. Set Operation
When the CRUISE SW is turned on and the SET SW is pushed with the vehicle speed within the set limit (Approx. 40 km/h,
25 mph to 200 km/h, 124 mph), a signal is input to TERMINAL 11 of the cruise control ECU, and the vehicle speed at the
time the SET SW is released is memorized in the ECU as the set speed.
2. Set Speed Control
During cruise control driving, the ECU compares the set speed memorized in the ECU with the actual vehicle speed input
into TERMINAL 12 of the cruise control ECU from the combination meter, and controls the cruise control actuator to maintain
the set speed.
When the actual speed is lower than the set speed, the ECU causes the current to the cruise control actuator to flow from
TERMINAL 15 of the cruise control ECU to TERMINAL 1 of the cruise control actuator to TERMINAL 2 to TERMINAL 7 of
the cruise control ECU. As a result, the motor in the cruise control actuator is rotated to open the throttle valve and the
throttle cable is pulled to increase the vehicle speed. When the actual driving speed is higher than the set speed, the current
to the cruise control actuator flows from TERMINAL 7 of the ECU to TERMINAL 2 of the cruise control actuator to
TERMINAL 1 to TERMINAL 15 of the cruise control ECU.
This causes the motor in the cruise control actuator to rotate to close the throttle valve and return the throttle cable to
decrease the vehicle speed.
3. Coast Control
During cruise control driving, while the COAST SW is on, the cruise control actuator returns the throttle cable to close the
throttle valve and decrease the driving speed. The vehicle speed when the COAST SW is turned off is memorized, and the
vehicle continues at the new set speed.
4. Accel Control
During cruise control driving, while the ACC SW is turned on, the cruise control actuator pulls the throttle cable to open the
throttle valve and increase the driving speed.
The vehicle speed when the ACC SW is turned off is memorized and the vehicle continues at the new set speed.
5. Resume Control
Unless the vehicle speed falls below the minimum speed limit (Approx. 40km/h, 25mph) after canceling the set speed by the
CANCEL SW, pushing the RES SW will cause the vehicle to resume the speed set before cancellation.
6. Manual Cancel Mechanism
If any of the following operations occurs during cruise control operation, the magnetic clutch of the actuator turns off and the
motor rotates to close the throttle valve and the cruise control is released.
∗ Placing the shift lever to positions except "D" position (Park/Neutral position SW except "D" position)(A/T), depressing the
clutch pedal (Cruise control clutch SW off)(M/T). "Signal is not input to TERMINAL 4 of the ECU"
∗ Depressing the brake pedal (Stop light SW on). "Signal input to TERMINAL 3 of the ECU"
∗ Pushing the CANCEL SW (CANCEL SW on). "Signal input to TERMINAL 1 of the ECU"
∗ Pushing the CRUISE SW off "signal input to TERMINAL 1 of the ECU".
7. Tap–Up Control Function
When the difference between the actual vehicle speed and the set speed is less than 5 km/h (3 mph), the set speed can be
increased 1.6 km/h (1 mph) each time by operating the RES/ACC SW quickly within 0.6 seconds.
8. Tap–Down Control Function
When the difference between the actual vehicle speed and the set speed is less than 5 km/h (3 mph), the set speed can be
lowered 1.6 km/h (1 mph) each time by operating the SET COAST SW quickly within 0.6 seconds.
150
2004 COROLLA (EWD533U)