TOYOTA SUPRA 1986 Service Repair Manual

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

98
HEADLIGHT (FOR CANADA)
222 22
222 22
1 2
1 2
E2
EA 15A
HEAD
(
LH±UPR)7. 5A
DRL15A
HE AD
(
RH±UP R)15A
HEA D
(
RH±LWR)15A
HE AD
(
LH±LWR)
HEA DLIGHT
LO RHHE ADLIGHT
LO LH H4 H3 R
R±W
R
R
R R±W
R±B R±G
R±B W±B W±B
W±B
222 22 111 11E7
E7
E2E1
1 2
1 2
B 1B3
B 2B4A1A5A2
A3
3 2IB1 2
IF1 6
E2IF1 14
EA EB IE
TO FOG L I GHT
RELAY W±B
W±B
W±BW±B
W±B
W±B
R±WR±L
R±BR±L R
W±B
IB5 13
W±B
R±L R±W R±W R±WR±L
R±B
R±Y
R±W
R±Y
W±B
W±BHIGH BEAM
INDICATOR LIGHT
[COMB. METER] DA YTIME RUNNING
LIGHT RELAY NO. 3 HEADLIGHT
HI LHHEA DLIGHT
HI RH
C12 H1 H2R±W
R±W
R±W
B D2 ,D3A
R±B
E8

99
VOLTAGE IS ALWAYS APPLIED FROM THE MAIN FUSE, THROUGH THE HEADLIGHT RELAY (COIL SIDE) TO TERMINAL 5 OF THE
DAYTIME RUNNING LIGHT RELAY (MAIN), TERMINAL 6 OF INTEGRATION RELAY, TERMINAL 14 OF DIMMER SW, DIMMER RELAY
(DAYTIME RUNNING LIGHT RELAY NO. 2) (COIL SIDE), TO TERMINAL 17 OF THE DAYTIME RUNNING LIGHT RELAY (MAIN). WHEN THE
IGNITION SW IS TURNED ON, VOLTAGE FROM THE GAUGE FUSE IS APPLIED TO TERMINAL 2 OF THE DAYTIME RUNNING LIGHT
RELAY (MAIN).
1. DAYTIME RUNNING LIGHT OPERATION
WHEN THE ENGINE STARTS, VOLTAGE FROM TERMINAL ªLº OF THE GENERATOR (ALTERNATOR) IS APPLIED TO TERMINAL 11 OF
THE DAYTIME RUNNING LIGHT RELAY (MAIN). IF THE PARKING BRAKE LEVER IS PULLED UP (PARKING BRAKE SW ON) AT THIS
TIME, THE DAYTIME RUNNING LIGHT SYSTEM DOES NOT OPERATE. WHEN THE PARKING BRAKE IS RELEASED (PARKING BRAKE
SW OFF), A SIGNAL IS OUTPUT FROM TERMINAL 1 OF THE PARKING BRAKE SW TO TERMINAL 8 OF THE DAYTIME RUNNING LIGHT
RELAY (MAIN). THIS ACTIVATES THE DAYTIME RUNNING LIGHT RELAY (MAIN), TURNING ON THE DIMMER RELAY (DAYTIME
RUNNING LIGHT RELAY NO. 2). CURRENT ALSO FLOWS FROM THE MAIN FUSE TO DIMMER RELAY (DAYTIME RUNNING LIGHT
RELAY NO. 2) (POINT SIDE) " HEAD (LH±UPR) FUSE " HEADLIGHT HI LH " HEADLIGHT HI RH " TERMINAL (A)5 OF DAYTIME
RUNNING LIGHT RELAY NO. 3 " TERMINAL (A)3 " GROUND, CAUSING THE HEADLIGHTS TO LIGHT UP AT APPROX. 20 % OF THEIR
NORMAL BRIGHTNESS.
ONCE THE DAYTIME RUNNING LIGHT RELAY (MAIN) HAS BEEN ACTIVATED AND THE HEADLIGHTS LIGHT UP, THE HEADLIGHTS
REMAIN ON EVEN IF THE PARKING BRAKE LEVER IS ENGAGED AGAIN (PARKING BRAKE SW ON).
2. HEADLIGHT OPERATION
WHEN THE LIGHT CONTROL SW IS AT HEAD POSITION AND THE DIMMER SW AT LOW POSITION, CURRENT FLOWS FROM THE
HEADLIGHT RELAY (COIL SIDE) TO TERMINAL 6 OF THE INTEGRATION RELAY " TERMINAL 7 " TERMINAL 13 OF LIGHT CONTROL
SW " TERMINAL 11 " GROUND, ACTIVATING THE HEADLIGHT RELAY.
THIS CAUSES CURRENT TO FLOW FROM THE HEADLIGHT RELAY (POINT SIDE) TO THE HEAD LWR FUSE " HEADLIGHT LO "
GROUND, CAUSING THE HEADLIGHTS TO LIGHT UP AT NORMAL BRIGHTNESS. SIMULTANEOUSLY, CURRENT FLOWS FROM THE
DRL FUSE " DAYTIME RUNNING LIGHT RELAY NO. 3 (COIL SIDE) " GROUND, ACTIVATING RELAY NO. 3.
WHEN THE DIMMER SW IS AT HIGH POSITION, TERMINAL 12 OF THE DIMMER SW OUTPUTS A SIGNAL TO TERMINAL 16 OF THE
DAYTIME RUNNING LIGHT RELAY (MAIN) TO ACTIVATE IT. THIS TURNS ON DIMMER RELAY (DAYTIME RUNNING LIGHT RELAY NO. 2).
SO CURRENT FLOWS FROM DIMMER RELAY (DAYTIME RUNNING LIGHT RELAY NO. 2) (POINT SIDE) TO THE HEAD (LH±UPR) FUSE
" HEADLIGHT HI LH " DAYTIME RUNNING LIGHT RELAY NO. 3 (POINT SIDE) " GROUND, AND FROM THE HEAD (RH±UPR) FUSE "
DAYTIME RUNNING LIGHT RELAY NO. 3 (POINT SIDE) " HEADLIGHT HI RH " DAYTIME RUNNING LIGHT RELAY NO. 3 (POINT SIDE)
" GROUND, CAUSING THE HEADLIGHTS TO OPERATE AT HI.
WHEN THE DIMMER SW IS AT FLASH POSITION, CURRENT FROM THE HEADLIGHT RELAY (COIL SIDE) FLOWS TO TERMINAL 14 OF
THE DIMMER SW " TERMINAL 9 " GROUND, ACTIVATING THE RELAY. SIMULTANEOUSLY, CURRENT FROM THE HEADLIGHT RELAY
(POINT SIDE) FLOWS TO HEADLIGHT LO, LIGHTING UP HEADLIGHT LO AND ACTIVATING DAYTIME RUNNING LIGHT RELAY NO. 3.
THEN TERMINAL 12 OF THE DIMMER SW OUTPUTS A SIGNAL TO TERMINAL 16 OF THE DAYTIME RUNNING LIGHT RELAY (MAIN),
ACTIVATING THE DAYTIME RUNNING LIGHT RELAY (MAIN) SO THAT CURRENT FLOWS TO HEADLIGHT HI LIKE IT DOES FOR HIGH
POSITION. THIS CAUSES ALL HEADLIGHTS TO LIGHT UP.
D 6 DAYTIME RUNNING LIGHT RELAY (MAIN)
15±GROUND : ALWAYS APPROX. 12 VOLTS
2±GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
13±GROUND : ALWAYS CONTINUOUS
5±GROUND : APPROX. 12 VOLTS WITH THE DAYTIME RUNNING LIGHT SYSTEM
DOES NOT OPERATE OR LIGHT CONTROL SW AT OFF OR TAIL POSITION
(WITH THE CONNECTOR IS DISCONNECTED, ALWAYS APPROX. 12 VOLTS)
8±GROUND : CONTINUOUS WITH THE PARKING BRAKE LEVER RELEASED
SYSTEM OUTLINE
SERVICE HINTS

100
HEADLIGHT (FOR CANADA)
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
B 224 (2JZ±GTE)D 628H 424 (2JZ±GTE)
C1228G 224 (2JZ±GTE)I2029
C1328H 124 (2JZ±GTE)P 529
D 2A24H 224 (2JZ±GTE)
D 3B24H 324 (2JZ±GTE)
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
222R/B NO. 2 (ENGINE COMPARTMENT LEFT)
423R/B NO. 4 (LEFT KICK PANEL)
: 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)
1H
1J20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1K
20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
2A22BATTERY AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
2B22ENGINE ROOM MAIN WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IB1
IB236ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IB3
36ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IB536ENGINE ROOM MAIN WIRE AND COWL WIRE (RIGHT KICK PANEL)
IF136INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)IF236INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)
II136ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EA32 (2JZ±GTE)FRONT SIDE OF RIGHT FENDER
EB32 (2JZ±GTE)FRONT SIDE OF LEFT FENDER
IE36LEFT KICK PANEL
IG36RIGHT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E 1E 832ENGINE ROOM MAIN WIRE
E 232ENGINE ROOM MAIN WIREI 238COWL WIREE 7
32ENGINE ROOM MAIN WIRE
I 438COWL WIRE

101