1986 TOYOTA SUPRA engine coolant

26
ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
[2JZ±GE]
A 1 A/C Ambient Temp. Sensor E 2 Electronically Controlled Transmission Solenoid
A 3 A/C Dual Pressure SW E 3 Engine Coolant Temp. Sensor (EFI Water Temp.
A 4 A/C Magnetic Clutch and Lock Sensor Sensor)
A 5 A/T Fluid Temp. Sensor E 4 Engine Coolant Temp. Sender (Water Temp.
A 6 ABS Actuator Sender)
A 7 ABS Actuator E 6 Engine Hood Courtesy SW
A 8 ABS Relay E 7 Engine Oil Level Sensor
A 9 ABS Relay
A 10 ABS Speed Sensor Front LH F 1 Front Airbag Sensor LH
A 11 ABS Speed Sensor Front RH F 2 Front Airbag Sensor RH
F 3 Front Fog Light and Parking Light LH
B 1 Back-Up Light SW (for M/T) F 4 Front Fog Light and Parking Light RH
B 2 Brake Fluid Level Warning SW F 5 Front Side Marker Light LH
F 6 Front Side Marker Light RH
C 4 Cruise Control Actuator F 7 Front Turn Signal Light LH
F 8 Front Turn Signal Light RH
D 1 Data Link Connector 1 (Check Connector) F 9 Front Wiper Motor
D 4 Distributor
G 1 Generator (Alternator)
E 1 EGR Gas Temp. Sensor G 2 Generator (Alternator)

29
Position of Parts in Instrument Panel
E 8 Electronically Controlled Transmission Pattern O 5 O/D Main SW and A/T Indicator Light (for Shift
Select SW Lever)
E 9 Engine Control Module (Engine and Electronically
Controlled Transmission ECU) P 4 PPS ECU
E 10 Engine Control Module (Engine and Electronically P 5 Parking Brake SW
Controlled Transmission ECU)
E 11 Engine Coolant Temp. Sensor (Water Temp. Sensor) R 4 Radio and Player (w/o Stereo Power Amplifier)
(for A/C System) R 5 Radio and Player (w/o Stereo Power Amplifier)
R 6 Radio and Player (w/ Stereo Power Amplifier)
F 10 Front Tweeter (Speaker) LH R 7 Remote Control Mirror SW
F 11 Front Tweeter (Speaker) RH R 8Rheostat
G 3 Glove Box Light S 6 Seat Heater SW
G 4 Glove Box Light SW S 7 Shift Lock ECU
S 8 Stereo Power Amplifier
H 10 Hazard SW S 9 Stereo Power Amplifier
H 11 Heated Oxygen Sensor (Sub) S 10 Stereo Power Amplifier
H 12 Heater Control SW S 11 Stop Light SW
H 13 Heater Control SW S 16 Sub Heated Oxygen Sensor
(for California)
I 18 Ignition Key Cylinder Light
I 19 Ignition SW T 5 Telltale Light LH
I 20 Integration Relay T 6 Telltale Light RH
T 7 Theft Deterrent ECU
J 1 Junction Connector T 8 TRAC Off SW
J 2 Junction Connector T 9 Traction ECU
T 10 Traction ECU
K 3 Key Interlock Solenoid T 13 Theft Deterrent ECU
K 4 Kick Down SW
U 1 Unlock Warning SW
N 2 Noise Filter

48
POWER SOURCE (Current Flow Chart)*1: (FOR CANADA)
*2: (FOR USA)
*Page Nos. of
Related Systems
Parts
Code or
Location
CB or Fuse
Location
96
164
220
Daytime Running Light
Relay (Main)
D6
* These are the page numbers of the first page on which the related system is shown.
The part indicated is located somewhere in the system, not necessarily on the page indicated here.


7.5A HTR
7.5A IGN
7.5A RAD No. 2
7.5A ST
7.5A TURN
10A ECU±B
10A ECU±IG
10A GAUGE
10A MIR±HTR
10A PANEL
10A TAIL
15A CIG
15A SEAT±HTR
15A STOP
20A WIPER
30A DEFOG
30A DOOR
7.5A ALT±S
7.5A DOME
7.5A DRL
7.5A TRAC
15A FOG
15A HAZ±HORN
15A HEAD (LH) *2
15A HEAD (LH±LWR) *1
15A HEAD (LH±UPR) *1
15A HEAD (RH) *2
15A HEAD (RH±LWR) *1
15A HEAD (RH±UPR) *1
20A RAD No. 1
30A ABS No. 2
30A EFI No. 1
30A EFI No. 2
30A FAN
50A HTR
50A MAIN
60A ABS No. 1
60A POWERD7 D8 D10 D11 D12 E2 E4 E5 E7 E8 E9 E10 F3 F4 F5 F6 F7 F8 F9 11 870
82118 118 118 140 220 228 220 112 60
70
140 64
82
150
70
82
140
150
228102
106102
106102 102 111 111 126
Diode (for Interior Light)
Diode (for Idle±Up)
Door Courtesy SW LH
Door Courtesy SW RH
Door Key Lock and
Unlock SW LH
Electronically Controlled
Transmission Solenoid
Engine Coolant Temp. Sender
(Water Temp. Sender)
Engine Coolant Temp. SW
(Water Temp. SW)
Engine Oil Level Sensor
Electronically Controlled
Transmission Pattern
Select SW
Engine Control Module
(Engine and Electronically
Controlled Transmission
ECU)
Front Fog Light and Parking
Light LH
Front Fog Light and Parking
Light RH
Front Side Marker Light LH
Front Side Marker Light RH
Front Turn Signal Light LH
Front Turn Signal Light RH
Front Wiper Motor
[LOCATION](1): J/B No. 1 (See page 20)(2): R/B No. 2 (See page 19)(3): R/B No. 4 (See page 23)
20 22
23

70
ENGINE CONTROL (FOR 2JZ±GTE)
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. (WATER TEMP.) SIGNAL CIRCUIT
THE ENGINE COOLANT TEMP. SENSOR (EFI WATER TEMP. SENSOR) DETECTS THE ENGINE COOLANT TEMP. (WATER TEMP.)
AND HAS A BUILT±IN THERMISTOR WITH A RESISTANCE, WHICH VARIES ACCORDING TO THE ENGINE COOLANT TEMP.
(WATER TEMP.) WHICH IS INPUT INTO TERMINAL THW OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU) AS A CONTROL SIGNAL.
(2) INTAKE AIR TEMP. SIGNAL CIRCUIT
THE INTAKE AIR TEMP. SENSOR IS INSTALLED IN THE MASS AIR FLOW (AIR FLOW METER) AND DETECTS THE INTAKE AlR
TEMP. WHICH IS INPUT AS A CONTROL SIGNAL TO TERMINAL THA OF THE ENGINE CONTROL MODULE (ENGINE AND
ELECTRONICALLY CONTROLLED TRANSMISSION ECU).
(3) OXYGEN DENSITY SIGNAL CIRCUIT
THE OXYGEN DENSITY IN THE EXHAUST EMISSION IS DETECTED BY THE HEATED OXYGEN SENSORS SIDE AND INPUT AS A
CONTROL SIGNAL TO TERMINALS OX1, OX2 OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU).
(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 (ENGINE AND ELECTRONICALLY CONTROLLED
TRANSMISSION ECU).
(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 (ENGINE AND ELECTRONICALLY CONTROLLED
TRANSMISSION ECU). 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 (SPEED SENSOR) NO.1 INSTALLED IN THE TRANSMISSION
AND THE SIGNAL IS INPUT TO TERMINAL SP1 OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU) VIA THE COMBINATION METER.
(7) NEUTRAL POSITION SIGNAL CIRCUIT
THE PARK/NEUTRAL POSITION SW (NEUTRAL START SW) DETECTS WHETHER THE SHIFT POSITION IS IN ªNº AND ªPº OR NOT,
AND THE SIGNAL IS INPUT INTO TERMINAL NSW OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU).
(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 (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) AS A CONTROL SIGNAL.
(9) BATTERY SIGNAL CIRCUIT
VOLTAGE IS CONSTANTLY APPLIED TO TERMINAL BATT OF THE ENGINE CONTROL MODULE. (ENGINE AND
ELECTRONICALLY CONTROLLED TRANSMISSION ECU). WITH THE IGNITION SW TURNED ON, THE VOLTAGE FOR ENGINE
CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) START±UP POWER SUPPLY IS
APPLIED TO TERMINAL +B OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED
TRANSMISSION ECU) VIA EFI MAIN RELAY.
THE CURRENT FLOWING THROUGH THE IGN FUSE FLOWS TO TERMINAL IGSW OF THE ENGINE CONTROL MODULE (ENGINE
AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU).
(10) INTAKE AIR VOLUME SIGNAL CIRCUIT
INTAKE AIR VOLUME IS DETECTED BY THE MASS AIR FLOW (AIR FLOW METER) AND THE SIGNAL IS INPUT TO TERMINAL VG
OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) 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 (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) AS
A CONTROL SIGNAL.
(12) STARTER SIGNAL CIRCUIT
TO CONFIRM WHETHER THE ENGINE IS CRANKING, THE VOLTAGE IS APPLIED TO THE STARTER MOTOR DURING CRANKING
IS DETECTED AND THE SIGNAL IS INPUT INTO TERMINAL STA OF THE ENGINE CONTROL MODULE (ENGINE AND
ELECTRONICALLY CONTROLLED TRANSMISSION ECU) 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 INTO TERMINALS
KNK1 AND KNK2 AS A CONTROL SIGNAL.
SYSTEM OUTLINE

75
*
1 : ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU
2 1
2 1
2 1
E14E16 E16 E16 E16
E16E16
B 46 B 24 B 44 B 63 B 42 B 41 B43 B64
B 27 B 7 B 5 B 25 B 6 B 26 1234 4321
12 13 A A A
A
A
13 8 4
15
19 A A A
A
A
+B FPE1 G1 G1± G2 G2± NE± NE
B LG Y±L L±R BR±BBR±B BR±B BR±B
GR±R BR±B
L±R
L±R B±R
B±RBR R±LBRWR±L
L±RBR
WL±R
Y
R
Y±L
GR±R
L±Y
O
BR±YBR±B BR±BBR±B GR±RY±L BR±BRY
OX2 OX1TE1 VF1 VCC VTA1 IDL1 VTA2 IDL2 THW OIL THG
(
SHIELDED)(
SHIELDED)
(
SHIELDED) (
SHIELDED)
(
SH IELD ED) (
SHIELDED)
E1 A5 E3
EGR GAS TEMP. SENSOR A/T FLUID TEMP. SENSOR ENGINE COOLANT TEMP. SENSOR
(
EFI WATER TEMP. SENSOR)
D1
DATA LINK CONNECTOR 1
(
CHECK CONNECTOR)IG± ENGINE CONTROL MODULE(
*1) A E9 ,E10B
TO TRACTION
ECUL±R
THROTTLE POSITION
SENSOR T2
SUB THROTTLE
POSITION SENSOR S5
BRE13
B±R
JUNCTION
CONNECTOR J2
BRI17
2 1
2 112 (
SHIELDED)
(
SHIELDED)
(
SHIELDED)
BRL B±WW
B±R B±RBR L
CAMSHAFT POSITION
SENSOR NO. 1
CAMSHAFT POSITION
SENSOR NO. 2CRANKSHAFT POSITION
SENSOR C1
C2 C3 O
O
BR
BR
BR E16R
TO TRACTION
ECU
(
A/T)(
A/T)
A 16II1 29
B±W B±W
TACO
FROM COMBINATION
METER

78
ENGINE CONTROL (FOR 2JZ±GTE)
EFI MAIN RELAY
(2) 3± (2) 5 : CLOSED WITH IGNITION SW AT ON POSITION
EFI NO. 2 RELAY
(2) 3± (2) 5 : CLOSED WITH IGNITION SW AT ON POSITION
E 3 ENGINE COOLANT TEMP. SENSOR (EFI WATER TEMP. SENSOR)
1± 2:10±20 K (±20°C, ±4°F)
4± 7 K ( 0°C, 32°F)
2± 3 K (20°C, 68°F)
0.9±1.3 K (40°C, 104°F)
0.4±0.7 K (60°C, 140°F)
0.2±0.4 K (80°C, 176°F)
I 1 IDLE AIR CONTROL VALVE (ISC VALVE)
1, 3± 2: APPROX. 10±30 
4, 6± 5: APPROX. 10±30 
I12, I13, I14, I15, I16, I17 INJECTOR
1± 2: APPROX. 13±8 
T 2 THROTTLE POSITION SENSOR
1± 4: APPROX. 4±9 K
1± 3:3.3± 10.0 K WITH THROTTLE VALVE FULLY OPENED POSITION
0.2± 0.8 K WITH CLEARANCE BETWEEN LEVER AND STOP SCREW 0 MM (0 IN.)
1± 2:0±2.3 K WITH CLEARANCE BETWEEN LEVER AND STOP SCREW 0.45 MM (0.0177 IN.)
INFINITY WITH CLEARANCE BETWEEN LEVER AND STOP SCREW 0.55 MM (0.0216 IN.)
E 9(B), E10(A) ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU)
(VOLTAGE AT ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) WIRING CONNECTORS)
BATT±E1 : ALWAYS 9±14 VOLTS
IGSW±E1 : 9±14 VOLTS WITH IGNITION SW ON
M±REL±E1 : 9±14 VOLTS WITH IGNITION SW ON
+B±E1 : 9±14 VOLTS WITH IGNITION SW ON
IDL1±E2 : 9±14 VOLTS WITH IGNITION SW ON AND THROTTLE VALVE FULLY OPEN
:0 ±1.5 VOLTS WITH IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED
VTA1±E2 :0.3± 0.8 VOLTS WITH IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED
:3.2±4.9 VOLTS WITH IGNITION SW ON AND THROTTLE VALVE OPEN
#10, #20, #30±E01, E02 : PULSE GENERATION (ENGINE IDLING)
#40, #50, #60±E01, E02 : PULSE GENERATION (ENGINE IDLING)
THA±E2 : 0.5±3.4 VOLTS WITH IGNITION SW ON AND INTAKE AIR TEMP. 20°C (68°F)
THW±E2 : 0.2±1.0 VOLTS WITH IGNITION SW ON AND COOLANT TEMP. 80°C (176°F)
STA±E1 : 6±14 VOLTS WITH ENGINE CRANKING
ISC1, ISC2, ISC3, ISC4±E1 : PULSE GENERATION (ENGINE IDLING)
W±E1 :9±14 VOLTS WITH ENGINE IDLING
IGF±E1 : PULSE GENERATION (ENGINE IDLING)
NSW±E1 :0±3 VOLTS WITH IGNITION SW ON AND SHIFT LEVER P OR N POSITION
9±14 VOLTS WITH IGNITION SW ON AND SHIFT LEVER EXCEPT P OR N POSITION
SP1 : PULSE GENERATION
TE1, TE2±E1 :9±14 VOLTS WITH IGNITION SW ON
A/C±E1 :0±1.5 VOLTS WITH IGNITION SW ON AND A/C OFF
7.5±14 VOLTS WITH IGNITION SW ON AND A/C ON
ELS±E1 : 9±14 VOLTS WITH TAILLIGHT ON, DEFOGGER ON
0±1.5 VOLTS WITH TAILLIGHT OFF, DEFOGGER OFF
STP±E1 :7.5±14 VOLTS WITH STOP LIGHT SW ON (BRAKE PEDAL DEPRESSED)
0±1.5 VOLTS WITH STOP LIGHT SW OFF
(RESISTANCE OF ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) WIRING CONNECTORS)
IDL1±E2 : INFINITY WITH THROTTLE VALVE OPEN
:0±2.3 KWITH THROTTLE VALVE FULLY CLOSED
VTA1±E2 :3.3 K10.0KWITH THROTTLE VALVE FULLY OPEN
:200  ±800  WITH THROTTLE VALVE FULLY CLOSED
VCC±E2 : 4 K±9 K
THA±E2 : 2 K±3 KWITH INTAKE AIR TEMP. 20°C (68°F)
THW±E2 : 200 ±400  WITH COOLANT TEMP. 80°C (176°F)
ISC1, ISC2, ISC3, ISC4± +B :10±30 
#10, #20, #30, #40, #50, #60± +B : 13.2 ±14.2 
SERVICE HINTS

82
ENGINE CONTROL (FOR 2JZ±GE)
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. (WATER TEMP.) SIGNAL CIRCUIT
THE ENGINE COOLANT TEMP. SENSOR (EFI WATER TEMP. SENSOR) DETECTS THE ENGINE COOLANT TEMP. (WATER TEMP.)
AND HAS A BUILT±IN THERMISTOR WITH A RESISTANCE, WHICH VARIES ACCORDING TO THE ENGINE COOLANT TEMP.
(WATER TEMP.) WHICH IS INPUT INTO TERMINAL THW OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU) AS A CONTROL SIGNAL.
(2) INTAKE AIR TEMP. SIGNAL CIRCUIT
THE INTAKE AIR TEMP. SENSOR IS INSTALLED IN THE VOLUME AIR FLOW (AIR FLOW METER) AND DETECTS THE INTAKE AlR
TEMP. WHICH IS INPUT AS A CONTROL SIGNAL TO TERMINAL THA OF THE ENGINE CONTROL MODULE (ENGINE AND
ELECTRONICALLY CONTROLLED TRANSMISSION ECU).
(3) OXYGEN DENSITY SIGNAL CIRCUIT
(EXCEPT CALIFORNIA)
THE OXYGEN DENSITY IN THE EXHAUST EMISSION IS DETECTED BY THE OXYGEN SENSOR FRONT AND REAR SIDE AND
INPUT AS A CONTROL SIGNAL TO TERMINALS OX1, OX2 OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU).
(FOR CALIFORNIA)
THE OXYGEN DENSITY IN THE EXHAUST EMISSION IS DETECTED BY THE HEATED OXYGEN SENSOR FRONT AND REAR SIDE
AND INPUT AS A CONTROL SIGNAL TO TERMINALS OX1, OX2, OX3 OF THE ENGINE CONTROL MODULE (ENGINE AND
ELECTRONICALLY CONTROLLED TRANSMISSION ECU).
(4) RPM SIGNAL CIRCUIT
CRANKSHAFT POSITION IS DETECTED BY THE PICK±UP COIL INSTALLED INSIDE THE DISTRIBUTOR. CRANKSHAFT POSITION
IS INPUT AS A CONTROL SIGNAL TO TERMINALS G1 AND G2 OF THE ENGINE CONTROL MODULE (ENGINE AND
ELECTRONICALLY CONTROLLED TRANSMISSION ECU), AND ENGINE SPEED IS INPUT TO TERMINAL NE.
(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 (ENGINE AND ELECTRONICALLY CONTROLLED
TRANSMISSION ECU). 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 (SPEED SENSOR) NO.1 INSTALLED IN THE TRANSMISSION
AND THE SIGNAL IS INPUT TO TERMINAL SP1 OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU) VIA THE COMBINATION METER.
(7) NEUTRAL POSITION SIGNAL CIRCUIT
THE PARK/NEUTRAL POSITION SW (NEUTRAL START SW) DETECTS WHETHER THE SHIFT POSITION IS IN ªNº OR ªPº OR NOT,
AND THE SIGNAL IS INPUT INTO TERMINAL NSW OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU).
(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 (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) AS A CONTROL SIGNAL.
(9) BATTERY SIGNAL CIRCUIT
VOLTAGE IS CONSTANTLY APPLIED TO TERMINAL BATT OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU). WITH THE IGNITION SW TURNED ON, THE VOLTAGE FOR ENGINE CONTROL MODULE
(ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) START±UP POWER SUPPLY IS APPLIED TO TERMINALS
+B OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) VIA EFI MAIN
RELAY.
THE CURRENT FLOWING THROUGH THE IGN FUSE FLOWS TO TERMINAL IGSW OF THE ENGINE CONTROL MODULE (ENGINE
AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU).
(10) INTAKE AIR VOLUME SIGNAL CIRCUIT
INTAKE AIR VOLUME IS DETECTED BY THE VOLUME AIR FLOW (AIR FLOW METER) AND THE SIGNAL IS INPUT TO TERMINAL
KS OF THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) 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 (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) AS
A CONTROL SIGNAL.
(12) STARTER SIGNAL CIRCUIT
TO CONFIRM WHETHER THE ENGINE IS CRANKING, THE VOLTAGE IS APPLIED TO THE STARTER MOTOR DURING CRANKING
IS DETECTED AND THE SIGNAL IS INPUT INTO TERMINAL STA OF THE ENGINE CONTROL MODULE (ENGINE AND
ELECTRONICALLY CONTROLLED TRANSMISSION ECU) AS A CONTROL SIGNAL.
SYSTEM OUTLINE

87
* 1 : CALIFORNIA
*
2 : EXCEPT CALIFORNIA
* 3 : ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU
1 2
2 1
2 1
1 1
E23E27
E23E28 I17 I17 I17E28 E28 E27
B 64 B 43 B44 B24 B46
B 48 B73 B72 B 47
4 2 4 2 432
1 3 1 3 1
(
SHIELDED)
(
SHIELDED) (
SHIELDED) (
SHIELDED)
(
SHIELDED)
(
SHIELDED)
(
SHIELDED)
(
SHIELDED)
BR
B±R
BR
B± W
L±RBR L±R B±WB± RR±L R±L
BR
B±R W BR±B BR±B BR±B
BR B±RBR B±R WW W
B±L
R±L
B±Y B±YR±LBR±YO L±Y RY
R Y L±R
BR±B
BR±B
BR±B
BR±B
R
OX1HT1
OX2HT2
+B E +B E VTA1
IDL1 THW OIL THG
HT OX HT OX
(
*1)
THROTTLE POSITION
SENSOR T2
TO CRUISE
CONTROL ECU
ENGINE COOLANT TEMP. SENSOR
(
EFI WATER TEMP. SENSOR)
A/T FLUID TEMP. SENSOR
EGR GAS TEMP. SENSOR E3
A5
E1 OXYGEN SENSOR
(
EXCEPT CALIFORNIA
ON FRONT SIDE)
OXYGEN SENSOR
(
EXCEPT CALIFORNIA
ON REAR SIDE) O3
O4(
*1)
(
*2)
MAIN HEATED
OXYGEN SENSOR
(
FOR CALI FORNIA
ON REAR SIDE) M3
(
*1)
(
*1)
(
*2) ENGINE CONTROL MODULE
(
*3)A E9 ,E10B
W
E26
EDB±R
BR
B± R 10A
MIR±HTR10A
PANEL15A
STOP
1 2
IJ1 11 II1 321I 10 1E 6 1H 4
A 15 A4 23 1
G±WR±Y R±Y
G± W WG±OL±R
STP ELS FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
IF1 3
L±RSTOP
LIGHT
SW DIODE
(
FOR IDLE±UP) D8
S11
L±R
(
A/ T) (
A/T) (
*1) (
*1)
(
*1)
MAIN HEATED
OXYGEN SENSOR
(
FOR CALIFORNIA
ON FRONT SIDE) M2
(
*1)
(
*1)(
*1)(
*1)