1986 TOYOTA SUPRA wiring

90
ENGINE CONTROL (FOR 2JZ±GE)
EFI MAIN 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) 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 
ACIS± +B : 38.5 ±44.5 
SERVICE HINTS

197
SRS (SUPPLEMENTAL RESTRAINT SYSTEM)
NOTICE: When inspecting or repairing the SRS (supplemental restraint system), perform the operation in
accordance with the following precautionary instructions and the procedure and precautions in the Repair
Manual for the applicable model year.

Malfunction symptoms of the supplemental restraint system are difficult to confirm, so the diagnostic trouble
codes become the most important source of information when troubleshooting.
When troubleshooting the supplemental restraint system, always inspect the diagnostic trouble codes before
disconnecting the battery.

Work must be started after 90 seconds from the time the Ignition SW is set to the ªLOCKº position and the
negative (±) terminal cable is disconnected from the battery.
(The supplemental restraint system is equipped with a back±up power source so that if work is started within
90 seconds of disconnecting the negative (±) terminal cable of the battery, the SRS may be activated.)
When the negative (±) terminal cable is disconnected from the battery, memory of the clock and audio systems
will be cancelled. So before starting work, make a record of the contents memorized by each memory system.
When work is finished, reset the clock and audio system as before and adjust the clock.
To avoid erasing the memory of each memory system, never use a back±up power supply from outside the
vehicle.

When removing the steering wheel pad or handling a new steering wheel pad, keep the pad upper surface
facing upward. Also, lock the lock lever of the twin lock type connector at the rear of the pad and take care
not to damage the connector.
(Storing the pad with its metallic surface up may lead to a serious accident if the SRS inflates for some reason.)

Always store a removed or new front passenger airbag assembly with the airbag door facing up. Storing the
airbag assembly with the airbag door facing down could cause a serious accident if the airbag inflates.

Store the steering wheel pad where the ambient temperature remains below 93°C (200°F), without high
humidity and away from electrical noise.

Never use SRS parts from another vehicle. When replacing SRS parts, replace them with new parts.

Never disassemble and repair the steering wheel pad, front passenger airbag assembly, center airbag sensor
assembly or front airbag sensors.

Before repairing the body, remove the airbag sensors if during repair shocks are likely to be applied to the
sensors due to vibration of the body or direct tapping with tools or other parts.

Do not reuse a steering wheel pad or front airbag sensors.
After evaluating whether the center airbag sensor assembly is damaged or not, decide whether or not to reuse
it. (See the Repair Manual for the method for evaluating the center airbag sensor assembly.)

When troubleshooting the supplemental restraint system, use a high±impedance (Min. 10k
/V) tester.

The wire harness of the supplemental restraint system is integrated with the cowl No. 2 wire harness
assembly.
The vehicle wiring harness exclusively for the airbag system is distinguished by corrugated yellow tubing, as
are the connectors.

Do not measure the resistance of the airbag squibs.
(It is possible this will deploy the airbag and is very dangerous.)

If the wire harness used in the supplemental restraint system is damaged, replace the whole wire harness
assembly.
When the connector to the front airbag sensors can be repaired alone (when there is no damage to the wire
harness), use the repair wire specially designed for the purpose.
(Refer to the Repair Manual for the applicable Model year for details of the replacement method.)

INFORMATION LABELS (NOTICES) are attached to the periphery of the SRS components. Follow the
instructions on the notices.

246
HOW TO USE THIS MANUAL
OVERALL ELECTRICAL WIRING DIAGRAM

Junction Block (The number in the circle is the
J/B No. and connector code is shown beside
it). Junction Blocks are shaded to clearly
separate them from other parts (different junc-
tion blocks are shaded differently for further
clarification.).
Example:
Indicates related system.
Indicates the wiring harness and wiring har-
ness connector. The wiring harness with male
terminal is shown with arrows
Outside numerals are pin numbers.
is used to indicate different wiring and
connector, etc. when the vehicle model, engine
type, or specification is different.
Indicates a shielded cable.
Indicates and located on ground point.
The same code occuring on the next page
indicates that the wire harness is continuous. System Title
Indicates the wiring color.
Wire colors are indicated by an alphabetical code.
B = Black L = Blue R = Red
BR = Brown LG = Light Green V = Violet
G = Green O = Orange W = White
GR = Gray P = Pink Y = Yellow
The first letter indicates the basic wire color and
the second letter indicates the color of the stripe.
Indicates the connector to be connected to a
part (the numeral indicates the pin No.)
The position of the parts is the same as shown
in the wiring diagram and wire routing.
Indicates the pin number of the connector.
The numbering system is different for female
and male connectors.
The numbering system for the overall wiring dia-
gram is the same as above.
Indicates a Relay Block. No Shading is used and
only the Relay Block No. is shown to distinguish
it from the J/B.
247

Remote Control MirrorSeat Heater (for Canada)SRS (Supplemental
Restraint System)Shift LockStartingTheft Deterrent and
Door Lock ControlTurn Signal and Hazard
Warning LightUnlock and Seat Belt
Warning
HeadlightHornIlluminationInterior LightLight Auto Turn OffPower SeatPower SourcePower WindowPPS (Progressive
Power Steering)Radio and Player
ABS (Anti±Lock Brake
System)Auto AntennaABS and Traction ControlBack±Up LightChargingCigarette LighterCombination MeterCruise ControlElectronically Controlled
Transmission and A/T
IndicatorEngine ControlFog Light
5±417±325±321±11±416±8 (for 2JZ±GE)24±418±319±3
23±3 (w/ Stereo
Power Amplifier)
24±2 (w/o Stereo
Power Amplifier)1~26±120±312±212±411±28±310±3
13±321±29±214±31±27±4
Taillight
11±421±47±210±2
SYSTEM INDEX
Stop Light
248
Clock
20±315±8 (for 2JZ±GTE)
Electric Tension Reducer
20±416±3 (for 2JZ±GE)15±3 (for 2JZ±GTE)
Front Wiper and Washer
22±44±3 (for 2JZ±GE)3±3 (for 2JZ±GTE)
6±3 (for Canada)5±3 (for USA)
Ignition
9±42±4 (for 2JZ±GE)2±2 (for 2JZ±GTE)
Radiator Fan and
Automatic Air
Conditioning
26±3
Remote Window Defogger
and Mirror Heater
20±2
Rear Wiper and Washer
22±2
OVERALL ELECTRICAL WIRING DIAGRAM

OVERALL ELECTRICAL WIRING DIAGRAM
1
234
2SUPRA
2IG2AM2 3
IJ11IJ19
4IB1
2
2A2 1
2 1
2 1
2 1
2 1
2 1
2A 6B 5B 4B 10B 11B 12B
1A 1B 2B 3B 9B 8B 4A3A 7B2 1
2 1
ECEC +B IGC1 IGC2 IGC3 IGC4 IGC5 IGC6
TACH IGT1 IGT2 IGT3 IGT4 IGT5 IGT6 IGF+B
IGTEXT
IGFC±
N E G1 G2 G± IGNITER
I6
IGNITION COIL NO. 1 I7
IGNITION COIL NO. 2 I8
IGNITION COIL NO. 3 I9
IGNITION COIL NO. 4 I10
IGNITION COIL NO. 5 I11
IGNITION COIL NO. 6
IGNITER
D4
DI STRI B UT OR
N1
NOI S E
FIL TER
To Dat a Link Connector 1
(
Chec k Connector)
< 3±3>
To Engine Contr ol Module
(
Engine and Electronically
Controlled Transmission ECU)
<3±5>I5
IGNITION
COIL
N1
NOISE
FILTER
To Engine Contr ol Module
(
Engine and Elec tronically
Controlled Transmission ECU)
<4±7> To Tachometer
[Comb. Meter]
< 25±6>To Engine Control Module
(
Engine and Electr onic ally
Cont rolled Transmission ECU)
<4±7>
Fr ont side of
intake manifoldFront side of
intake manifold
BR BR B R W
R±Y
R± WBR
BR
R±Y
L±O
P± B
GR±G
GR±B
B± O
R± W
G
B± OL±YY Y± B Y± G Y±R
B B±O
B±O
B±O
B±O
B±O
B±OB±WB±R
B± O
B± OG B± O
B± O
W±R W±R B±O
B
B±O B±O(
2J Z±GE)
B± O B± O(
2J Z±GE)
B±O
B±O B± O B±O B±O B±O B± OB± O
B±OB±O I19
IGNI TION SW
IGNITER
12
34A I2 BLACK
1 23456
789 111210 B I3 BLACK
(
2JZ±GTE)
1234
30A
AM2
BATTERYGND21
B±O
I2 A ,I3 B
112345C I4 BLACK3C 4C 5C
2C 1C I4 C
B±W
To A/C Amplifier
< 26±5>
B±W
1 2
To
Data Link
Connec tor 1
(
Check Connec tor)
< 4±2>B±W
Power Source
Ignition(
for 2JZ±GTE)
Ignition(
for 2JZ±GE)

OVERALL ELECTRICAL WIRING DIAGRAM
1
234
3SUPRA(
Cont. next pa ge)
7ACC
IG1
ST1
IG2 AM1 4
8
3 2AM2
2 1
5 3 5
2 1
2
2 1J 4
22 22
224EA18EA15EA2
11IC2 12IC2 7IC2
2 BP15 4
M 6 BP1 9IJ1
4IB1
4 IJ1 12 IJ1 8 IJ1 IC210IJ16
IJ15
IJ117
IJ113
IF17
EA22 1B 4
22 22
EB BI1 2
1 2
1 2
1 2
1 2
1 2
Left quarter pillar Fr ont side of
left fender
120A ALT30A EFI NO. 2 30A EFI NO. 1
30A AM2
50A AM1(
for USA)
60A AM1(
for Canada)
15 II113 I I1 13 I J2 1J 51J31J6
1E 12
IJ118
ED Rear side of
intake manifold10A GAUGE7. 5A IGN7. 5A ST
B±O
B±RL±O
W± B
B±R L±RO W P±B V±G
L±BBRLG P± GY± L GR±R
L±RY±L
P±G
LG
L±B
B±R W± B8 562
15 16 22 1523 8 12 9 110 174 14
128 3 7 2
1 5
L±R
G
V± W
LW±BV± WGR± L YL
Y±LLG
L±R
G
V±W
L±OV± GB±Y B±YB±R
B±R B±R
B±O
B±Y
GR
B±W
B±YGR
B± Y
L±O
W± R W±R
WWB±OB± Y B±Y B±R
B± O
B± YW±B
3EFI NO. 2 REL AYEFI MAIN RELAY
(
Shor t Pin) EFPCDIFP
AB
OX2 TS
WA WB
F1 4
FUEL PUMP
D5
DA TA L I NK
CONNECTOR 2
(
TDCL)
D1
DA TA LI NK
CONNE CTOR 1
(
CHECK
CONNE CTOR)From ABS
Solenoid
Rel a y
< 19±2> ECT A/D TRC TC ABSFrom O/D Ma in
SW< 15±5>
Fr om Cr uise
Cont rol ECU
< 17±2>
From Traction
ECU< 19±4> From ABS and Traction
ECU< 19±7>
From Cr uise Control
ECU< 17±2>
From Center Air bag
Sens or As smbly< 13±3> Fr om ABS and Trac tion
ECU< 19±8>
W E1 ENGTE2 TE1TT
I19
IGNITION SW
F15
FUEL PUMP ECU +B
AB
234876 1
L BRR G B± YWR±B
R
R± W
R± G
R± Y
R± L
W± B
W± B
W± B
B B± R V±WG#10 #20 #30 #40 #50 #60S1
SFI RESISTOR(
EFI RESISTOR)I12
INJECTOR NO. 1 I13
INJECTOR NO. 2 I14
INJECTOR NO. 3 I15
INJECTOR NO. 4 I16
INJECTOR NO. 5 I17
INJECTOR NO. 6 (
SHI EL DED)
BATTERY+BFrom Center
Airbag Sens or
Assembly
< 13±3>
193
42LG P± GY± L GR±R(
A/T) B±R B±OGR B±W(
A/T) B±YW
BR BRBR
BR
W L±BL±BBR BR
B±OB
B T5
MAL FUNCT I ON I NDI CA TOR
LAMP(
CHECK ENGINE
WARNI NG LIGHT)
GR ±RY±L P±GLG
IG±(
SHI EL DED)
3 TE1 +B OX1
(
SHI ELDED)
(
SHI ELDED) R± L R± Y R± G R±WR R± B B± R V± WG L±B R± LBR
BR L±BBR
From Igniter
<2±2>
From ABS and
Trac tion ECU
< 19±7>
FP E1 1
1 111 2
222 2B±Y
B E 9 DARK GRAYA E1 0 DARK GRAY ENGINE CONTROL MODULE
(
Engine and Electr onic ally
Controlled Transmission ECU) 1E 81K4 5IB1
2A 1
From Center Airbag
Sensor Assembly< 13±3>
From ABS an d
Traction ECU< 19±8>
From Cruis e
Con t r o l E CU< 1 7± 1> P±B
11TC
From ABS and
Trac tion
ECU< 19±4>
13
VF 1
B± R Y
B±Y
2 2W
(
A/T)
Engine Control(
for 2JZ±GTE)
Power Source
(
A/T)

OVERALL ELECTRICAL WIRING DIAGRAM
1
234
4 SUPRA
(Cont. next page
)
7ACC
IG1
ST1
IG2 AM1 4
8
3 2AM2
1J 41E 8
22 2
2
2 4EA18EA13EA3
11 IC2 12 IC2
2BP17IC26IJ1
4IB1
4IJ1 12IJ1
9IJ18IJ1 6BP1
5IJ117 1J113 IJ1 7 IF1 1J 3
2 1
3 5
22IC210
IB15
5 4
M
1 2
1 2
1 2
1 2
1 2
1 2
BI EB4IC1 12IC1
18 IJ1 4 IJ2 14 IJ2 20 I J1 5 IJ 2 1J 5
8IC11E 12
ED II1 1510 IC1 9 IC1 1B 4I19
IGNITION SW
F1 5
FUEL PUMP ECUD5
DATA LI NK CONNECTOR 2
(
TDCL) Fr om ABS ECU< 18±4>
From O/D Main SW
< 16±5>
From Center Airbag
Sen sor As sembl y
< 13±3>
7. 5A IGN
50A AM1 EFI MAIN RELAY
30A AM2
120A ALT30A EFI NO. 1
BATTERY I12 INJECTOR NO. 1I13 INJECTOR NO. 2
I14 INJECTOR NO. 3 I15 INJECTOR NO. 4 I16 INJECTOR NO. 5
I17 INJECTOR NO. 6
To ABS
Relay< 18±1>
From Center Airbag
Sensor Assembly
< 13±3>
Fr om Cr uise
Control ECU< 17±1>
Fr om Center Air bag
Sens or Ass embly
< 13±3>
Fr om ABS ECU< 18±2> D1
DATA L I NK CONNE CTOR 1
(
CHE CK CONNE CTOR)AB TC I G± TS OX2 OX1 E1VF1 VF2 TE1 +B FP +B
FP E DI FPCTC AB ECT A/ D TT
E1 W ENG TE2 TE1
From Cr uise Control
ECU< 17±2>
From Center Air bag
Sens or Ass embly< 13±3>
From ABS ECU< 18±2>From ABS ECU
< 18±2>
From ABS
ECU< 18±3>
F14
FUEL PUMP
(
Shor t Pin)10A
GAUGE
E1 +B
OX
T5
MALFUNCTION INDICATOR LAMP
(
CHECK E NGI NE WA RNI NG L I GHT)
ENGI NE CONTROL MODUL E
(
Engine and Elect ronically
Controlled Transmission ECU)
10
30
50
70 1
21
41
612
22
42
623
23
43
634
24
44
645
25
45
656
26
46
667
27
47
678
28
48
689
29
49
6911
31
51
7120
40
60
80 19
39
59
79 18
38
58
78 17
37
57
77 16
36
56
76 15
35
55
75 14
34
54
74 13
33
53
73 12
32
52
72 B DRA K GRA Y
(
SHIELDED)(
SHI ELDED)
(
SHI ELDED)
(
SHIELDED) R± L R± Y R± G R±WR R± B V± WG R± LW L±B R± L(
*1) BR BR
L±B
BRL±OY±L P±GLG GR±R(
A/ T) B±YGR B± W BR±W(
*1) B±OB± R
L±B GRB±O B±WB±Y
B±R
L±R
LG
P± G
Y± L
W±B
W± R
WWW± R GRV± WG W± B
V±WG L L±R L±R L±RY± L P±G LG L±B GR±R
O
V±G
V±G
B±Y
B± R
B±R B±R B±YW±B
B±Y B± Y B±R B±R
B± O V±WG W±B W±B L
B±RY±LLG
Y± L P± G LG L±B BR GR±R
B±O
B±O B±O B±O
B±O
B±O
B±O
R± L R± Y R± G R±WR R± B
BW±B W±B B± R B±Y
P±B B±WY R± LW BRL±B L±BR± L R±L R±L
BR BR
BR B±RBR±W
YY B±R BR±W
B±Y B± R BR± W
L±O
B± R B± R
BR B±O
B± RP±B B±O
4
2 2
22412 914 10 5
11222 8 13 14 24
HT 21
1
11 1321 5 12783
23 511191615 4 3 33
W± BBR
10
20
30
40 1
11
21
312
12
22
323
13
23
334
14
24
345
15
25
356
16
26
367
17
27
378
18
28
389
19
29
39 ADARKGRAY
B±O B±O B±O B±OWB B±R
WA Fr om Cr uise
Control ECU< 17±2>
E1 0 E9
Rear side of
intake manifold
From Igniter
<2±4>
Fro nt s i de o f
left f ender Left quart er pillar 2A 12 2
W (
A/T)(
A/ T) (
*1)(
*1)(
*1)
(
*1)(
*1)
*1 : California
(
*1)(
*1)(
*1)(
*1)(
*1)(
*1)
(
*1)
Engine Control(
for 2JZ± GE) Power
Source
ABS