Cruise Control System Description - Toyota Hilux Surf 1993 Owner's Manual

BE–60
Standby Operation
• When the ignition switch is turned ON (IG), current flows from the battery to terminal 6 of the Cruise
Control ECU (hereafter called ECU).
• When the ignition switch is turned ON (IG), current flows from the battery to terminal 2 of the Main
Relay.
Operation
1. MAIN SWITCH OPERATION
When the main switch is pushed ON, current flows from terminal 2 of the main relay R terminal 4 Rtermi-
nal 4!6 of the slip ring–i terminal 3I5–terminal 3/5 R of the cruise control switch (hereafter called
SCS)–i terminal 1/2 R terminal 1 of the main switch–terminal 2 R/terminal 2I2 of the SCS R ter–
minal 4I5 R terminal 4/5 of the slip ring R terminal 5/6 R ground.
As a result, the main relay turned ON R current flows to terminal 12 of ECU.
After that, current flows through the "CRUISE" indicator light to terminal 4 of the ECU.
Therefore, the main switch remains on and continues to supply current to terminal 12 of the ECU.
2. SPEED CONTROL SWITCH OPERATION
The cruise control switch controls the SET, COAST, RESUME, ACCEL and CANCEL functions.
When the each speed control switch is pushed ON, sends a signal (each voltage) from terminal 2I5 of
the SCS R terminal 2l5 of the slip ring R terminal 6/6 R terminal 19 of the ECU.
Then, the vehicle speed at the moment the switch (SET position) is released is registered in memory.
3. SPEED CONTROL OPERATION
When the vehicle speed is set by the cruise control switch, the ECU send a signal from terminal 3 of
the ECU terminal 2 of the stop light switch R terminal 4 R terminal 1 of the actuator (release valve
side).
At the same time, the ECU sends a signal from terminal 5 of the ECU R terminal 2 of the actuator
(control valve side).
Then, the actuator increases or decreases the throttle valve opening angle in accordance with the sig–
nal from the ECU.
4. CANCEL OPERATION
The Cruise Control System is provided with several types of the cancel, such as the cruise control
switch (CANCEL), the stop light switch, the parking brake switch and the park/neutral position switch
(AM or clutch switch (M/T).
(a) Cruise Control Switch (CANCEL)
When the cruise control switch (CANCEL) is pushed ON, sends a cancellation signal from terminal
2/5 of the SCS R terminal 2I5 of the slip ring R terminal 6/6 R terminal 9 of the ECU.
(b) Parking Brake Switch
When the parking brake lever is pulled, the parking brake switch turned ON R Sends a cancella–
tion signal (ground voltage) to terminal 14 of the ECU.
(c) Park/Neutral Position Switch (A/T)
When the shift lever is set to the "N" or "P" position, the park/neutral position switch turned ON
R sends a cancellation signal (ground voltage) to terminal 14 of the ECU.
(d) Clutch Switch (M/T)
When the clutch pedal is depressed, the clutch switch is turned ON R sends a cancellation signal
(ground voltage) to terminal 13 of the ECU.
(e) Stop Light Switch
When the brake pedal is depressed, the SW B of stop light switch is turned OFF R the release
valve (in actuator) is opened, and the SW A of stop light switch is turned ON R sends a cancel–
lation signal to terminal 17 of the ECU.
Therefore, the operation of the cruise control system is canceled and the actuator is shut off due to the
operation of these switches.
BODY ELECTRICAL SYSTEM
System Description
– Cruise Control System