1986 TOYOTA SUPRA Service Repair Manual

220
COMBINATION METER
15A
HEAD(
RH)
(
FOR USA)7. 5A
ST
21K4
1E 19 1E14 1H 11 1H7 P
N5
6
2 1
IF2 13 IF1 6IB1 2
IF2 1IF24IF114
IE1 1IE12IE13
BP1 5BP13BP11 II1 24 II1 19 A 2A 16 A15 B6
A 7A6A3A9A8B8A10 A11 A13
II1 29
TRAC
CRUISE
HIGH BEAM
WATER TEMP.
FUEL
FUEL
TACHO
IJ213
IE EC IFI3 FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
IJ29
EXT
F14I4
E10
C9
P2
COMBINATION METER FROM HEADLIGHT HI RH
FUEL SENDERIGNITER
ENGINE CONTROL MODULE
(
ENGINE AND ELECTRONICALLY
CONTROLLED TRANSMISSION ECU)
CLUTCH START
SW
PARK/NEUTRAL POSITION
SW(
NEUTRAL START SW) Y±G
Y±B
BR BRY±B Y±GBR Y±L R±LO W
Y±G
Y±B
BR
B±W B±W
B±W BRBR Y±LR±L W±BW
O TO TRACTION ECU
TO CRUISE CONTROL
ECU
TO DIMMER SW
[COMB. SW]
ENGINE COOLANT TEMP. SENDER
(
WATER TEMP. SENDER)
LH
RH TURN
B
(
A/T)
B
(
M/T)B±W
(
M/T) R±W
(
*1)B±W
G±B
G±Y R±W R±W
R±W
G±B
G±YB±W(
A/T)B
B BR
BR
(
*4)
(
*3) (
*1)(
*2)
BULB
CHECK RELAY
123416FROM TURN SIGNAL SW
[COMB. SW]
2 1
(
*2)
E4
C C10 , C11 , C 1 2BA
(
*3)
1TACO

221
*1 : USA
*
2 : CANADA*3 : 2JZ±GTE
*
4:2JZ±GE
10A
PANEL
1I 3
II1 7 II136 II11II118 II117 II127
C 4C10 C6C7C8C11
A 1C13 B7B5B4A14 B2B1
I2 I2I14
A A
EB IH EC 2 1 1II1 33
II1 34
2 1
IB2 14 IF1 15
D6
P5J1
E7
BRAKE FLUID LEVEL
WARNING SW
DIODE
ENGINE OIL
LEVEL SENSOR
JUNCTION
CONNECTORPARKING BRAKE
SW
DAYTIME RUNNING
LIGHT RELAY
(
MAIN)
OIL
PKBDELAYCOMBINATION METER FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
GR
R±B
L
G± R
LG±R
G±B G±B LG±RG±RL R±BGR BR±W
W±B
W±B
G
L±W
Y±G
R±Y
R±G Y±GG BR W±B W±BBR±W BR±W B±W
BR±W
BR±W R±W W±B
Y±G (
*3)
L±WR±Y
Y±G R±G
BR±W BR±W B±W(
*2 *3) B±W(
*2)G±OG±O
BRAKE
P
R
N
D
2
L
MASTER (
*1) (
*2)
(
*1)
(
*4)
(
*4) (
*1 *3)
(
*2)
TO GENE RATOR
(
ALTERNATOR)
FROM A/T INDICATOR LIGHT SW
[PARK/NEUTRAL POSITION SW
(
NEUTRAL START SW)
]
12
18
8
B2
C C10 , C11 , C 1 2BA
44
R±W
(
*3)
W±B
A

222
COMBINATION METER
10A
GAUGE
I14 I 8 I14 I14I14
I14
SPEED
II1 23
1E 112
1B 57. 5A
DOME 1E 12 IF3 10
I8
B 12 C 3C1B9
B 13 C2C12 B10 B11II1 2 II18
I14
I21
I14
IF II1 5 II138 FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
TO ENGINE CONTROL MODULE
(
ENGINE ECU)
TO CRUISE CONTROL ECUTO PPS ECU
TO A/ C AMPL I FI E R
TO ENGINE CONTROL
MODULE(
ENGINE ECU) TO RHEOSTAT
TO DIODE
(
FOR INTERIOR LIGHT)
IF25 II1 11 VEHICLE SPEED SENSOR
(
SPEED SENSOR)
NO. 1
(
FOR COMBINATION METER)
TELLTALE LIGHT RH
ODO AND TRIP
JUNCTION
CONNECTOR
COMBINATION METERMANU O/D OFF ILLUMINATION J1
V10
T6
B32
510 6 7 1411
BB14 8 1
DOORG±O G±O G±O
G±O
Y
Y
Y Y
G±O
R L±R
W±G
P
BR
R±B
R±GR L±R L±R
R R W±LV±G W±G
V±G
W±L W±G
P P P
BRYY
R W±G
P
P
P
P W±GL±R
Y±G
R±Y
L±W R±G
Y±G
R±Y
L±WYYYY
G±O
G±O
Y
P P
R±BC C10 , C11 , C 1 2BA
2

223
*
1:USA
* 2 : CANADA * 4 : 2JZ±GE*
3:2JZ±GTE
7. 5A
IGN10A
ECU±B
1E 81E13
1G 91E 4II1 15 II125
1E 18
1J 1 IE1 5IF212 IF22 32 210
16 18 12 15 6 1 4 3 5 8 9
B±O
W±R Y±R
V
Y±G
B±Y B±Y
L(
*4)
L(
*3)
L±B
LG±RL L±W
R± Y
L±B
Y±B
LG±R
W±B W± LY V
FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
Y±G
R± Y
L±WY
Y±B
IE 1
TO INTEGRATION
RELAY
TO LIGHT FAILURE
SENSOR
TO CENTER AIRBAG
SENSOR ASSEMBLY
TO ABS ECU
TO ABS AND TRACTION ECU
TO ENGINE CONTROL MODULE
(
ENGINE ECU)
TO TRACTION ECU
OIL PRESSURE
SW TELLTALE LIGHT RHTELLTALE LIGHT LH
FROM THEFT DETERRENT
ECU SEAT BELT
REAR LIGHT
CHRAGE
SRS
OIL LEVEL
ABS
OIL
TRAC OFF
SECURITY
MALFUNCTION
INDICATOR LAMP
(
CHE CK E NG INE)
W± B
O2 T5 T6
(
*3)

224
COMBINATION METER
B 2 BRAKE FLUID LEVEL WARNING SW
1±2 : CLOSED WITH FLOAT DOWN
P 5 PARKING BRAKE SW
1±GROUND : CLOSED WITH PARKING BRAKE LEVER PULLED UP
O 2 OIL PRESSURE SW
1±GROUND : CLOSED WITH OIL PRESSURE ABOVE APPROX. 20 KPA (2.8 PSI, 0.2 KG/CM2)
E 4 ENGINE COOLANT TEMP. SENDER (WATER TEMP. SENDER)
1±GROUND : APPROX. 160±240
(50°C, 122°F)
: APPROX. 17.1±20.4
(120°C, 288°F)
E 7 ENGINE OIL LEVEL SENSOR
1±2 : CLOSED WITH FLOAT UP AND ENGINE OIL TEMP. AT BELOW APPROX. 55°C (131°F)
OPEN WITH FLOAT DOWN AND ENGINE OIL TEMP. AT BELOW APPROX. 60°C (140°F)
F14 FUEL SENDER
1±2 : APPROX. 3
AT FUEL FULL
: APPROX. 11 0
AT FUEL EMPTY
C10(B), C12(A) COMBINATION METER
(B) 9±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
(A)16±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ST POSITION AND SHIFT LEVER AT P OR N POSITION (A/T)
12 VOLTS WITH IGNITION SW AT ST POSITION AND CLUTCH PEDAL DEPRESSED (M/T)
(A) 8±GROUND : ALWAYS CONTINUOUS
(A)11±GROUND : ALWAYS CONTINUOUS
(A) 2±GROUND : ALWAYS APPROX. 12 VOLTS
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
B224 (2JZ±GTE)E 426 (2JZ±GE)O 227 (2JZ±GE)B 226 (2JZ±GE)E724 (2JZ±GTE)P225 (2JZ±GTE)
C 928E 726 (2JZ±GE)P 227 (2JZ±GE)
C10B28E1029P 529
C11C28F1430T 529
C12A28I 427T 629
D 628J 129V1025 (2JZ±GTE)
E 424 (2JZ±GTE)O 225 (2JZ±GTE)V1027 (2JZ±GE)
: 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)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1G
1H
1I20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1J
20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1K
: 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)
IE136INSTRUMENT PANEL WIRE AND FLOOR NO. 2 WIRE (LEFT KICK PANEL)
IF136INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)IF236INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)
IF336INSTRUMENT PANEL WIRE AND COWL WIRE (RIGHT KICK PANEL)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
IJ238ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)
BP140FUEL GAUGE WIRE AND FLOOR NO. 2 WIRE (LUGGAGE ROOM FRONT LH)
SERVICE HINTS

225
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EB32 (2JZ±GTE)FRONT SIDE OF LEFT FENDEREB34 (2JZ±GE)FRONT SIDE OF LEFT FENDER
EC32 (2JZ±GTE)FRONT SIDE OF INTAKE MANIFOLDEC34 (2JZ±GE)FRONT SIDE OF INTAKE MANIFOLD
IE36LEFT KICK PANELIF36LEFT KICK PANEL
IH36RIGHT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I 238COWL WIREI1438INSTRUMENT PANEL WIREI 338INSTRUMENT PANEL WIREI2138INSTRUMENT PANEL WIRE
I 838INSTRUMENT PANEL WIRE

226
COMBINATION METER

228
RADIATOR FAN AND AUTOMATIC AIR CONDITIONING
1. HEATER BLOWER OPERATION
MANNAL BLOWER OPERATION
WHEN THE BLOWER CONTROL SW IS SET TO ANY BLOWER SPEEDS, THE A/C AMPLIFIER OPERATES AND THE CURRENT TO DRIVE
THE BLOWER MOTOR FLOWS FROM TERMINAL BLW OF THE A/C AMPLIFIER TO TERMINAL SI OF THE BLOWER MOTOR CONTROL
RELAY. THE CURRENT ACTIVATES THE RELAY AND THE VOLTAGE APPLIED TO TERMINAL +B OF THE BLOWER MOTOR CONTROL
RELAY IS OUTPUT AT TERMINAL M+ AS THE VOLTAGE FOR THE SELECTED BLOWER SPEED. THE CURRENT THEN FLOWS FROM
TERMINAL M+ OF THE BLOWER MOTOR CONTROL RELAY TO TERMINAL 2 " TERMINAL 1 " TERMINAL M± OF BLOWER MOTOR
CONTROL RELAY " TERMINAL GND " GROUND, AND THE BLOWER MOTOR OPERATES AT THE BLOWER SPEED SELECTED.
AUTO FUNCTION
WHEN THE AUTO SW IS TURNED ON, THE A/C AMPLIFIER CALCULATES THE REQUIRED VENT TEMPERATURE BASED ON THE SET
TEMPERATURE AND INPUT FROM EACH SENSOR. THEN TERMINAL BLW OF THE A/C AMPLIFIER INPUTS CURRENT TO TERMINAL SI
OF THE BLOWER MOTOR CONTROL RELAY IN CONFORMITY WITH THE REQUIRED VENT OUTPUT. THIS CURRENT ACTIVATES THE
BLOWER MOTOR CONTROL RELAY SO THAT CURRENT FLOWS FROM TERMINAL M+ OF THE BLOWER MOTOR CONTROL RELAY "
TERMINAL 2 OF BLOWER MOTOR " TERMINAL 1 " TERMINAL M± OF BLOWER MOTOR CONTROL RELAY " TERMINAL GND "
GROUND, ACTIVATING THE BLOWER MOTOR. THE BLOWER MOTOR THEN OPERATES AT DIFFERENT STEPS IN CONFORMITY WITH
VARIABLE CURRENT FLOW OUTPUT FROM TERMINAL BLW OF THE A/C AMPLIFIER TO TERMINAL SI OF THE BLOWER MOTOR
CONTROL RELAY.
2. OPERATION OF AIR INLET CONTROL SERVO MOTOR
(SWITCHING FROM FRESH TO RECIRC)
WITH IGNITION SW TURNED ON, THE CURRENT FLOWS FROM HTR FUSE TO TERMINAL 2 OF AIR INLET CONTROL SERVO MOTOR
" TERMINAL 5 " TERMINAL AIR OF A/C AMPLIFIER " TERMINAL GND " GROUND, THE MOTOR ROTATES AND THE DAMPER
STOPS AT RECIRC POSITION.
(SWITCH(NG FROM RECIRC TO FRESH)
WITH IGNITION SW TURNED ON, THE CURRENT FLOWS FROM HTR FUSE TO TERMINAL 2 OF AIR INLET CONTROL SERVO MOTOR
" TERMINAL 3 " TERMINAL AIF OF A/C AMPLIFIER " TERMINAL GND " GROUND, THE MOTOR ROTATES AND THE DAMPER
STOPS AT FRESH POSITION.
3. OPERATION OF AIR VENT MODE CONTROL SERVO MOTOR
WITH IGNITION SW TURNED ON, THE CURRENT FLOWS FROM HTR FUSE TO TERMINAL IG OF A/C AMPLIFIER
(SWITCHING FROM DEF TO FACE)
THE CURRENT FROM TERMINAL AOF OF A/C AMPLIFIER " TERMINAL 1 OF AIR VENT MODE CONTROL SERVO MOTOR "
TERMINAL 2 " TERMINAL AOD OF A/C AMPLIFIER " TERMINAL GND " GROUND. THE MOTOR ROTATES AND THE DAMPER
MOVES TO FACE SIDE. WHEN THE DAMPER OPERATES WITH THE A/C SW AT FACE POSITION, THE DAMPER POSITION SIGNAL IS
INPUT FROM TERMINAL 3 OF THE SERVO MOTOR TO THE TERMINAL TPO OF THE A/C AMPLIFIER. AS A RESULT, CURRENT TO THE
SERVO MOTOR CIRCUIT IS CUT OFF BY THE AMPLIFIER, SO THE DAMPER STOPS AT THAT POSITION.
(SWITCHING FROM FACE TO DEF)
THE CURRENT FLOWS FROM TERMINAL AOD OF A/C AMPLIFIER " TERMINAL 2 OF AIR VENT MODE CONTROL SERVO MOTOR "
TERMINAL 1 " TERMINAL AOF OF A/C AMPLIFIER " TERMINAL GND " GROUND, THE MOTOR ROTATES AND THE DAMPER STOPS
AT THAT POSITION.
4. OPERATION OF AIR MIX CONTROL SERVO MOTOR
WHEN THE TEMPERATURE SW IS TURNED TO THE ªCOOLº SIDE, THE CURRENT FLOWS FROM TERMINAL AMC OF A/C AMPLIFIER
" TERMINAL 1 OF AIR MIX CONTROL SERVO MOTOR " MOTOR " TERMINAL 2 " TERMINAL AMH OF A/C AMPLIFIER " TERMINAL
GND " GROUND AND THE MOTOR ROTATES. THE DAMPER OPENING ANGLE AT THIS TIME IS INPUT FROM TERMINAL 3 OF SERVO
MOTOR TO TERMINAL TP OF A/C CONTROL ASSEMBLY, THIS IS USED TO DETERMINE THE DAMPER STOP POSITION AND MAINTAIN
THE SET TEMPERATURE.
WHEN THE TEMPERATURE CONTROL SW IS TURNED TO THE ªWARMº SIDE, THE CURRENT FLOWS FROM TERMINAL AMH OF A/C
AMPLIFIER " TERMINAL 2 OF AIR MIX CONTROL SERVO MOTOR " MOTOR " TERMINAL 1 " TERMINAL AM1 OF A/C AMPLIFIER,
ROTATING THE MOTOR IN REVERSE AND SWITCHING THE DAMPER FROM COOL TO WARM SIDE.
SYSTEM OUTLINE