Toyota Supra 2015 Wiring Diagram Manual page 165

CRUISE CONTROL
SYSTEM OUTLINE
CURRENT IS APPLIED AT ALL TIMES THROUGH STOP FUSE TO TERMINAL 1 OF THE CRUISE CONTROL ECU,
TERMINAL 2 OF THE STOP LIGHT SW, AND ALSO THROUGH THE ECU-B FUSE TO TERMINAL 15 OF THE CRUISE
CONTROL ECU.
WITH THE IGNITION SW TURNED TO ON, THE CURRENT FLOWS THROUGH GAUGE FUSE TO TERMINAL (A) 9 OF
THE COMBINATION METER AND THE CURRENT THROUGH ECU-IG FUSE FLOWS TO TERMINAL 14 OF THE CRUISE
CONTROL ECU.
WHEN THE IGNITION SW IS ON AND THE CRUISE CONTROL MAIN SWITCH IS TURNED ON, A SIGNAL IS INPUT FROM
TERMINAL 15 OF CRUISE CONTROL MAIN SW TO TERMINAL 19 OF THE CRUISE CONTROL ECU. AS A RESULT, THE
CRUISE CONTROL ECU FUNCTIONS AND THE CURRENT FLOWS THROUGH TERMINAL 14 OF THE CRUISE
CONTROL ECU TO TERMINAL 13 OF THE CRUISE CONTROL ECU → GROUND, AND THE CRUISE CONTROL SYSTEM
IS IN A CONDITION READY FOR OPERATION.
AT THE SAME TIME, THE CURRENT THROUGH THE GAUGE FUSE FLOWS TO TERMINAL (A) 9 OF THE CRUISE
CONTROL INDICATOR LIGHT → TERMINAL (B) 6 → TERMINAL 7 OF THE CRUISE CONTROL ECU → TERMINAL 13 →
GROUND, CAUSING THE CRUISE CONTROL INDICATOR LIGHT TO LIGHT UP, INDICATING THAT THE CRUISE
CONTROL IS READY FOR OPERATION.
1. SET OPERATION
WHEN THE CRUISE CONTROL MAIN 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 18 OF THE CRUISE CONTROL ECU AND THE VEHICLE SPEED AT THE TIME THE SET SW IS
RELEASED, WHICH I 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 INPUTS INTO TERMINAL 20 OF THE CRUISE CONTROL ECU FROM THE SPEED
SENSOR, 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 12 → TERMINAL 1 OF THE CRUISE CONTROL
ACTUATOR → TERMINAL 2 → TERMINAL 11 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 CRUISE CONTROL ACTUATOR FLOWS FROM TERMINAL 11 OF THE ECU →
TERMINAL 2 OF THE CRUISE CONTROL ACTUATOR → TERMINAL 1 → TERMINAL 12 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 THE 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 SWITCH IS TURNED OFF IS MEMORIZED AND THE VEHICLE CONTINUES AT
THE NEW SET SPEED.
4. ACCEL CONTROL
DURING CRUISE CONTROL DRIVING, WHILE THE ACCEL 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 ACCEL 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. 40 KM/H, 25 MPH) AFTER
CANCELING THE SET SPEED BY THE CANCEL SW, PUSHING THE RESUME SW WILL CAUSE THE VEHICLE TO
RESUME THE SPEED SET BEFORE THE CANCELLATION.
6. MANUAL CANCEL MECHANISM
IF ANY OF THE FOLLOWING OPERATIONS OCCUR 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 IN EXCEPT "D" POSITION (PARK/NEUTRAL POSITION SW EXCEPT "D" POSITION).
"SIGNAL IS NOT INPUT TO TERMINAL 2 OF THE ECU" (A/T)
∗ DEPRESSING THE BRAKE PEDAL (STOP LIGHT SW ON). "SIGNAL IS INPUT TO TERMINAL 16 OF THE ECU"
∗ PUSHING THE CANCEL SWITCH (CANCEL SW ON). "SIGNAL IS INPUT TO TERMINAL 18 OF THE ECU"
∗ DEPRESSING THE CLUTCH PEDAL (CRUISE CONTROL CLUTCH SW OFF). "SIGNAL IS NOT INPUT TO TERMINAL
2 OF THE ECU"
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