1986 TOYOTA SUPRA Service Repair Manual

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

91
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A 526 (2JZ±GE)I 127 (2JZ±GE)O 327
C 928I 427O 427
C10A28I1227 (2JZ±GE)P 227 (2JZ±GE)
C12B28I1327 (2JZ±GE)S1129
D 126 (2JZ±GE)I1427 (2JZ±GE)S1629
D 426I1527 (2JZ±GE)T 227 (2JZ±GE)
D 528I1627 (2JZ±GE)T 529
D 828I1727 (2JZ±GE)T 629
E 126 (2JZ±GE)I1929V 127
E 326 (2JZ±GE)J 229V 227 (2JZ±GE)
E 9B29K 127 (2JZ±GE)V 327 (2JZ±GE)
E10A29K 227 (2JZ±GE)V 627 (2JZ±GE)
F1430M 227V1027 (2JZ±GE)
F1530M 327V1227
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
222R/B NO. 2 (ENGINE COMPARTMENT LEFT)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1B20ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1H
1I20COWL WIRE AND J/B NO 1 (LEFT KICK PANEL)1J20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1K
2A22BATTERY AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
EA134 (2JZ±GE)ENGINE WIRE AND ENGINE ROOM MAIN WIRE (NEAR THE R/B NO 2)EA334ENGINE WIRE AND ENGINE ROOM MAIN WIRE (NEAR THE R/B NO. 2)
IB136ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IC136FLOOR NO 2 WIRE AND COWL WIRE (LEFT KICK PANEL)IC236FLOOR NO. 2 WIRE AND COWL WIRE (LEFT KICK PANEL)
IF136INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
IJ138ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)IJ238ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)
BP140FUEL GAUGE WIRE AND FLOOR NO. 2 WIRE (LUGGAGE ROOM FRONT LH)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EB34 (2JZ±GE)FRONT SIDE OF LEFT FENDER
ED34 (2JZ±GE)REAR SIDE OF INTAKE MANIFOLD
IF36LEFT KICK PANEL
BI40LEFT QUARTER PILLAR
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E2034ENGINE ROOM MAIN WIREI 538INSTRUMENT PANEL WIREE23I 838INSTRUMENT PANEL WIRE
E24I1138COWL WIRE
E2534ENGINE WIREI1438INSTRUMENT PANEL WIRE
E2634ENGINE WIREI1738ENGINE WIRE
E27I2038COWL WIRE
E28B 640FLOOR NO. 2 WIRE
I 438COWL WIRE

92
ENGINE CONTROL (FOR 2JZ±GE)

93

94
HEADLIGHT (FOR USA)*2:2JZ±GE *1:2JZ±GTE
1 2
1 2
1 2
1 2 2222
22
IE 1K 5
1J 1
EA 13 142 6 31
211
12 4
11 9 123 22
7
COMBINATION
SW BATTERY
INTEGRATION
RELAY
HIGH BEAM
INDICATOR LIGHT
[COMB. METER]
HEADLIGHT HI RH
HEADLIGHT LO RH
HEADLIGHT HI LH
HEADLIGHT LO LH
15A
HEAD(
LH) 15A
HE AD(
RH)
HRLY
H
LIGHT
CONTROL
SW DIMMER
SW
OFF
TAIL
HE AD
LO W
HIGH
FLASH
C13
C12
H2
H4
H1
H3I20
W±B
W±B
R±L
R±L
R±L R±L
W±BB
R
R±L
W±B W±BR±LR±W R±YR±Y R±YR±Y
R
R
R±Y
R
R
W±BI2 IB2 13
IF1 14 IB17
I2 IB1 2
IF1 6
R±W R±W R±W
R±W
R±W
R±B
R±B R±L
2A 1E2:*1
E18 : * 2
E9:*1
E21 : * 2
E2:*1
E18 : * 2 HEADLIGHT
RELAY
50A
MAIN

95
HEADLIGHT RELAY
2 1± : CLOSED WITH LIGHT CONTROL SW AT HEAD POSITION OR DIMMER SW AT FLASH POSITION
C13 LIGHT CONTROL SW [COMB. SW]
13±11 : CLOSED WITH LIGHT CONTROL SW AT HEAD POSITION
C13 DIMMER SW [COMB. SW]
14±9 : CLOSED WITH DIMMER SW AT FLASH POSITION
12±9 : CLOSED WITH DIMMER SW AT HIGH OR FLASH POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C1228H224 (2JZ±GTE)H427 (2JZ±GTE)
C1328H 227 (2JZ±GE)H 427 (2JZ±GE)
H124 (2JZ±GTE)H324 (2JZ±GTE)I2029H 127 (2JZ±GE)H 327 (2JZ±GE)
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
222R/B NO. 2 (ENGINE COMPARTMENT LEFT)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1J20COWL WIRE AND J/B NO 1 (LEFT KICK LEFT)1K20COWL WIRE AND J/B NO. 1 (LEFT KICK LEFT)
2A22BATTERY AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IB136ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)IB236ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IF136INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EA32 (2JZ±GTE)FRONT SIDE OF RIGHT FENDEREA34 (2JZ±GE)FRONT SIDE OF RIGHT FENDER
IE36LEFT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E 232E2134ENGINE ROOM MAIN WIRE
E 932ENGINE ROOM MAIN WIREI 238COWL WIRE
E1834
ENGINE ROOM MAIN WIRE
X X 3 2X XX 3 2XXX
9
1112 13 14
12 12
67 12 12 C12C12 C13
H1 H2 H3 H4 I20(
2JZ±GTE)(
2JZ±GE)
BLACK
BLACK BLACK BROWN BROWN
X
SERVICE HINTS

96
HEADLIGHT (FOR CANADA)
1H 12 2
1 1
L
GENERATOR
(
ALTERNATOR)PARKING
BRAKE SW BA TTERYDAYTIME RUNNING
LIGHT RELAY(
MAIN) 10A
GAU GE7. 5A
DOME FROM POWER SOURCESYSTEM(
SEE PAGE 56)
D6
P5 G2
Y
Y±G B
Y±G
BR±W
11 8 2152
22
13
2
1 2450A MAINHEADLIGHT
RELAY
R
R±Y
W
R
R±Y
W
1
2B 1
IF2 7
Y±G
2A 1
II1 341B 5
1H 9
R R

97
2 117 5
6
14 13
12 9 117
13 16 18COMBINATION
SW
OFF
TA IL
HEA D
LOW
FLASH
DIMMER SWLIGHT
CONTROL
SW
C13R
R±W
W±B W±BG±WW±B
G±W
R R±Y
R±YR±Y
R±Y R
R±Y
W
R±Y
HIGH E7
IB3 1
2 1
EBI4
I2
I2 DAYTIME RUNNING
LIGHT RELAY(
MAIN) D6
TO THEFT DETERRENT ECU
R±Y B±W R±W W±B
IG1K 5
1J 1
W±B W±B
R±L
W W
R±Y
B2 DIODE
BRAKE FLUID
LEVEL WARNING SWIB 2 13
R±Y
4
431 2422
22
R±L
DIMMER RELAY
(
DAYTIME RUNNING
LIGHT RELAY NO. 2)
INTEGRATION
RELAY I20
IE