Toyota Supra 2015 Wiring Diagram Manual page 166

7. AUTO CANCEL FUNCTION
A) IF ANY OF THE FOLLOWING OPERATING CONDITIONS OCCUR DURING CRUISE CONTROL OPERATION, THE SET
SPEED IS ERASED, CURRENT FLOW TO MAGNETIC CLUTCH IS STOPPED AND THE CRUISE CONTROL IS
RELEASED. (MAIN SW TURNS OFF).
WHEN THIS OCCURS, THE IGNITION SW MUST BE TURNED OFF ONCE BEFORE THE MAIN SW WILL TURN ON.
∗ OVER CURRENT TO TRANSISTOR DRIVING MOTOR AND/OR MAGNETIC CLUTCH.
∗ WHEN CURRENT CONTINUED TO FLOW TO THE MOTOR INSIDE THE ACTUATOR IN THE THROTTLE VALVE
"OPEN" DIRECTION.
∗ OPEN CIRCUIT IN MAGNETIC CLUTCH.
∗ MOMENTARY INTERRUPTION OF VEHICLE SPEED SIGNAL.
∗ SHORT CIRCUIT IN CRUISE CONTROL SW.
∗ MOTOR DOES NOT OPERATE DESPITE THE MOTOR DRIVE SIGNAL BEING OUTPUT.
B) IF ANY OF THE FOLLOWING CONDITIONS OCCUR DURING CRUISE CONTROL OPERATION, THE SET SPEED IS
ERASED AND THE CRUISE CONTROL IS RELEASED. (THE POWER OF MAGNETIC CLUTCH IS CUT OFF UNTIL
THE SET SW IS "ON" AGAIN.)
∗ WHEN THE VEHICLE SPEED FALLS BELOW THE MINIMUM SPEED LIMIT, APPROX. 40 KM/H (25 MPH)
∗ WHEN THE VEHICLE SPEED FALLS MORE THAN 16 KM/H (10 MPH) BELOW THE SET SPEED, E.G. ON AN
UPWARD SLOPE.
∗ WHEN POWER TO THE CRUISE CONTROL SYSTEM IS MOMENTARILY CUT OFF.
8. AUTOMATIC TRANSMISSION CONTROL FUNCTION
∗ IN OVERDRIVE. IF THE VEHICLE SPEED BECOMES LOWER THAN THE OVERDRIVE CUT SPEED (SET SPEED
MINUS APPROX. 4 KM/H, 2.5 MPH) DURING CRUISE CONTROL OPERATION, SUCH AS DRIVING UP A HILL, THE
OVERDRIVE IS RELEASED AND THE POWER INCREASED TO PREVENT A REDUCTION IN VEHICLE SPEED.
∗ AFTER RELEASING THE OVERDRIVE, VEHICLE SPEED BECOMES HIGHER THAN THE OVERDRIVE RETURN
SPEED (SET SPEED MINUS APPROX, 2 KM/H, 1.2 MPH) AND THE ECU JUDGES BY THE SIGNALS FROM
POTENTIOMETER OF THE ACTUATOR THAT THE UPWARD SLOPE HAS FINISHED, OVERDRIVE IS RESUMED
AFTER APPROXIMATELY 2 SECONDS.
∗ DURING CRUISE CONTROL DRIVING, THE CRUISE CONTROL OPERATION SIGNAL IS OUTPUT FROM THE
CRUISE CONTROL ECU TO THE ENGINE CONTROL MODULE. UPON RECEIVING THIS SIGNAL, THE ENGINE
CONTROL MODULE CHANGES THE SHIFT PATTERN TO NORMAL. TO MAINTAIN SMOOTH CRUISE CONTROL
OPERATION (ON A DOWNWARD SLOPE ETC.), LOCK-UP RELEASE OF THE TRANSMISSION WHEN THE IDLING
POINT OF THE THROTTLE POSITION IS "ON" IS FORBIDDEN.
SERVICE HINTS
CRUISE CONTROL ACTUATOR
C 4
3-4 : APPROX. 38.5
CRUISE CONTROL SW [COMB. SW]
C14
15-17 : CONTINUITY WITH THE MAIN SW ON
5-17 : APPROX. 418
APPROX. 68
APPROX. 198
CRUISE CONTROL ECU
C16
14-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
15-GROUND : ALWAYS APPROX. 12 VOLTS
20-GROUND : 4 PULSE WITH 1 ROTATION OF ROTOR SHAFT
18-GROUND : APPROX. 418
APPROX. 198
APPROX. 68
13-GROUND : ALWAYS CONTINUITY
WITH THE CANCEL SW ON
WITH THE RESUME/ACCEL SW ON
WITH THE SET/COAST SW ON
WITH THE CANCEL SW ON IN CONTROL SW
WITH THE SET/COAST SW ON IN CONTROL SW
WITH THE RESUME/ACCEL SW ON IN CONTROL SW
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