Toyota Supra 2015 Wiring Diagram Manual page 71

ENGINE CONTROL (2JZ-GTE)
SYSTEM OUTLINE
THE ENGINE CONTROL SYSTEM UTILIZES A MICROCOMPUTER AND MAINTAINS OVERALL CONTROL OF THE
ENGINE, TRANSMISSION ETC. AN OUTLINE OF THE ENGINE CONTROL IS GIVEN HERE.
1. INPUT SIGNALS
(1) ENGINE COOLANT TEMP. SIGNAL CIRCUIT
THE ENGINE COOLANT TEMP. SENSOR DETECTS THE ENGINE COOLANT TEMP. WHICH IS INPUT INTO
TERMINAL THW OF THE ENGINE CONTROL MODULE AS A CONTROL SIGNAL.
(2) INTAKE AIR TEMP. SIGNAL CIRCUIT
THE INTAKE AIR TEMP. SENSOR IS INSTALLED IN THE MASS AIR FLOW METER AND DETECTS THE INTAKE AIR
TEMP. WHICH IS INPUT AS A CONTROL SIGNAL TO TERMINAL THA OF THE ENGINE CONTROL MODULE.
(3) OXYGEN DENSITY SIGNAL CIRCUIT
THE OXYGEN DENSITY IN THE EXHAUST EMISSION IS DETECTED BY THE HEATED OXYGEN SENSOR SIDE AND
INPUT AS A CONTROL SIGNAL TO TERMINAL OX1, OXS OF THE ENGINE CONTROL MODULE.
(4) RPM SIGNAL CIRCUIT
CRANKSHAFT POSITION IS DETECTED BY THE CRANKSHAFT POSITION SENSOR. CRANKSHAFT POSITION IS
INPUT AS A CONTROL SIGNAL TO TERMINAL NE OF THE ENGINE CONTROL MODULE.
(5) THROTTLE POSITION SIGNAL CIRCUIT
THE THROTTLE POSITION SENSOR DETECTS THE THROTTLE VALVE OPENING ANGLE AS A CONTROL SIGNAL,
WHICH IS INPUT INTO TERMINAL VTA1 OF THE ENGINE CONTROL MODULE. WHEN THE VALVE IS COMPLETELY
CLOSED, THE CONTROL SIGNAL IS INPUT INTO TERMINAL IDL1.
(6) VEHICLE SPEED CIRCUIT
THE VEHICLE SPEED IS DETECTED BY VEHICLE SPEED SENSOR NO. 1 INSTALLED IN THE TRANSMISSION AND
THE SIGNAL IS INPUT TO TERMINAL SP1 OF THE ENGINE CONTROL MODULE VIA THE COMBINATION METER.
(7) NEUTRAL POSITION SIGNAL CIRCUIT
THE PARK/NEUTRAL POSITION SW DETECTS WHETHER THE SHIFT POSITION IS IN "N" AND " P" OR NOT, AND
THE SIGNAL IS INPUT INTO TERMINAL NSW OF THE ENGINE CONTROL MODULE.
(8) A/C SW SIGNAL CIRCUIT
THE OPERATING VOLTAGE OF THE A/C MAGNETIC CLUTCH IS DETECTED AND THE SIGNAL IS INPUT INTO
TERMINAL ACMG OF ENGINE CONTROL MODULE AS A CONTROL SIGNAL.
(9) BATTERY SIGNAL CIRCUIT
VOLTAGE IS CONSTANTLY APPLIED TO TERMINAL BATT OF THE ENGINE CONTROL MODULE.
IGNITION SW TURNED ON, THE VOLTAGE FOR ENGINE CONTROL MODULE START-UP POWER SUPPLY IS
APPLIED TO TERMINAL +B OF THE ENGINE CONTROL MODULE VIA EFI MAIN RELAY.
THE CURRENT FLOWING THROUGH THE IGN FUSE FLOWS TO TERMINAL IGSW OF THE ENGINE CONTROL
MODULE.
(10) INTAKE AIR VOLUME SIGNAL CIRCUIT
INTAKE AIR VOLUME IS DETECTED BY THE MASS AIR FLOW METER AND THE SIGNAL IS INPUT TO TERMINAL
VG OF THE ENGINE CONTROL MODULE AS A CONTROL SIGNAL.
(11) STOP LIGHT SW SIGNAL CIRCUIT
THE STOP LIGHT SW IS USED TO DETECT WHETHER THE VEHICLE IS BRAKING OR NOT AND THE SIGNAL IS
INPUT INTO TERMINAL STP OF THE ENGINE CONTROL MODULE AS A CONTROL SIGNAL.
(12) STARTER SIGNAL CIRCUIT
TO CONFIRM WHETHER THE ENGINE IS CRANKING THE VOLTAGE APPLIED TO THE STARTER MOTOR DURING
CRANKING IS DETECTED AND THE SIGNAL IS INPUT IN TERMINAL STA OF THE ENGINE CONTROL MODULE AS
A CONTROL SIGNAL.
(13) ENGINE KNOCK SIGNAL CIRCUIT
ENGINE KNOCKING IS DETECTED BY KNOCK SENSOR FRONT AND REAR SIDE AND THE SIGNAL IS INPUT
TERMINALS KNK1 AND KNK2 AS A CONTROL SIGNAL.
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