1986 TOYOTA SUPRA airbag

24
ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
[2JZ±GTE]
A 1 A/C Ambient Temp. Sensor E 4 Engine Coolant Temp. Sender (Water Temp. Sender)
A 2 A/C Condenser Fan Motor E 5 Engine Coolant Temp. SW (Water Temp. SW)
A 3 A/C Triple Pressure SW E 6 Engine Hood Courtesy SW
(A/C Dual and Single Pressure SW) E 7 Engine Oil Level Sensor
A 4 A/C Magnetic Clutch and Lock Sensor
A 5 A/T Fluid Temp. Sensor F 1 Front Airbag Sensor LH
A 6 ABS Actuator F 2 Front Airbag Sensor RH
A 7 ABS Actuator F 3 Front Fog Light and Parking Light LH
A 10 ABS Speed Sensor Front LH F 4 Front Fog Light and Parking Light RH
A 11 ABS Speed Sensor Front RH F 5 Front Side Marker Light LH
F 6 Front Side Marker Light RH
B 1 Back±Up Light SW (for M/T) F 7 Front Turn Signal Light LH
B 2 Brake Fluid Level Warning SW F 8 Front Turn Signal Light RH
F 9 Front Wiper Motor
C 1 Camshaft Position Sensor No. 1
C 2 Camshaft Position Sensor No. 2 G 1 Generator (Alternator)
C 3 Crankshaft Position Sensor G 2 Generator (Alternator)
C 4 Cruise Control Actuator
H 1 Headlight Hi LH
D 1 Data Link Connector 1 (Check Connector) H 2 Headlight Hi RH
D 2 Daytime Running Light Relay No. 3 H 3 Headlight Lo LH
D 3 Daytime Running Light Relay No. 3 H 4 Headlight Lo RH
H 5 Heated Oxygen Sensor (Main)
E 1 EGR Gas Temp. Sensor H 8 Horn LH
E 2 Electronically Controlled Transmission Solenoid H 9 Horn RH
E 3 Engine Coolant Temp. Sensor (EFI Water Temp. Sensor)

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)

28
ELECTRICAL WIRING ROUTING
Position of Parts in Instrument Panel
A 12 A/C Amplifier B 5 Blower Motor Control Relay
A 13 A/C Amplifier B 6 Buckle SW LH
A 14 A/C Amplifier B 7 Buckle SW RH
A 15 A/C Evaporator Temp. Sensor
A 16 A/C Room Temp. Sensor C 5 Center Airbag Sensor Assembly
A 17 A/C Solar Sensor C 6 Cigarette Lighter
A 18 ABS ECU C 7 Cigarette Lighter Illumination
A 19 ABS ECU C 8 Clock
A 20 ABS and Traction ECU C 9 Clutch Start SW
A 21 ABS and Traction ECU C 10 Combination Meter
A 22 ABS and Traction ECU C 11 Combination Meter
A 23 ABS Lateral Acceleration Sensor C 12 Combination Meter
A 24 Air Inlet Control Servo Motor C 13 Combination SW
A 25 Air Mix Control Servo Motor C 14 Combination SW
A 26 Air Vent Mode Control Servo Motor C 15 Cruise Control Clutch SW
A 27 Airbag Squib (Steering Wheel Pad) C 16 Cruise Control ECU
A 28 Airbag Squib (Front Passenger Airbag Assembly)
A 29 Ashtray Illumination D 5 Data Link Connector 2 (TDCL)
A 30 Auto Antenna Control Relay D 6 Daytime Running Light Relay (Main)
D 7 Diode (for Interior Light)
B 3 Blower Motor D 8 Diode (for Idle-Up)
B 4 Blower Motor Control Relay

47
197
Center Airbag Sensor
Assembly
C5 C6 C10 C11D5 C7D1 D2 D3 C13 C8 C9 C12 C14 C15 C16 186 122 186 60
70
130 64
82
220159
140
150
164
174
220
122 70
82
181
228111140
150
22022094
9611194
96106 129
94
96
102
108
122
111 126 203 174140
150
17496 96 70
140
159 82
150
164
197
70
82
164
174
197
Cigarette Lighter
Cigarette Lighter
Illumination
Clock
Clutch Start SW
Brake Warning Light
[Comb. Meter]
Combination Meter
Meter Illumination
[Comb. Meter]
Speedometer
[Comb. Meter]
Turn Signal Indicator
Light [Comb. Meter]
Combination Meter
High Beam Indicator
Light [Comb. Meter]
Turn Signal Indicator
Light [Comb. Meter]
Dimmer SW [Comb. SW]
Fog Light SW [Comb. SW]
Horn SW [Comb. SW]
Light Control SW
[Comb. Meter]
Turn Signal SW
[Comb. Meter]
Front Wiper and Washer
SW [Comb. Meter]
Rear Wiper and Washer
SW [Comb. Meter]
Cruise Control Clutch SW
Cruise Control ECU
Data Link Connector 1
(Check Connector)
Daytime Running Light
Relay No. 3
Data Link Connector 2
(TDCL)
(4): R/B No. 5 (See page 20)
23

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.

200
SRS (SUPPLEMENTAL RESTRAINT SYSTEM)
7. 5A
IGN15A
CIG10A
ECU±B
1G 10 1G61E13
152
II1 12 II121 IF12IF111
I14
I14 I 5
1E3 1E4
1G7 1G9
13 14 12 7
8 9 11 10 34 21 56+SL ±SL +SR ±SR D+ D± P+ P± E1 E2AB TC AB TC
511 12 4
P±B B±Y B±Y
P±B
B±O
L±R
B±Y W±R
B±Y
P±B
B±Y
P±B B±Y
P±B
B±Y
P±B B±Y
P±B
S RS WARNING
LIGHT
[TELLTALE
LIGHT RH] T6DA TA LINK
CONNECTOR 1
(
CHECK CONNE CTOR)DATA LINK
CONNECTOR 2
(
TDCL) D1 D5 FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
1G 31G4
1J 1
IE 12
12 12
12
F1 F2
A2 7 A2 8 IG2 ACC LA TC
FRONT AIRBAG
SENSOR LHFRONT AIRBAG
SENSOR RH
AIRBAG SQUIB
(
STE ERING WHE EL
PAD)AIRBAG SQUIB
(
FRONT PASSENGER
AIRBAG ASSEMBLY) CENTER AIRBAG SENSOR ASSEMBLY
W±BR
W
GR
B
Y
L
G
BR
W±B
W±B
C5
SPIRAL
CABLE AABB (
*1)(
*1)* 1 : CONNECTION DETECTION PIN

201
*THE SRS (SUPPLEMENTAL RESTRAINT SYSTEM) IS A DRIVER AND FRONT PASSENGER PROTECTION DEVICE WHICH HAS A
SUPPLEMENTAL ROLE TO THE SEAT BELTS.
WHEN THE IGNITION SW IS TURNED TO ACC OR ON, CURRENT FROM THE CIG FUSE FLOWS TO TERMINAL 14 OF THE CENTER
AIRBAG SENSOR ASSEMBLY. ONLY WHEN THE IGNITION SW IS ON, THE CURRENT FLOWS FROM THE IGN FUSE TO TERMINAL 13.
IF AN ACCIDENT OCCURS WHILE DRIVING, WHEN DECELERATION CAUSED BY A FRONTAL IMPACT IS DETECTED BY EACH SENSOR
AND SWITCH, AND THE FRONTAL IMPACT EXCEEDS A SET LEVEL (WHEN THE SAFING SENSOR BUILT INTO THE CENTER AIRBAG
SENSOR ASSEMBLY IS ON AND THE CENTER AIRBAG SENSOR IS ON, FRONT AIRBAG SENSORS ARE OFF), CURRENT FROM THE
CIG OR IGN FUSE FLOWS TO TERMINALS 3, 2, OF THE CENTER AIRBAG SENSOR ASSEMBLY " TERMINAL 1 OF THE AIRBAG SQUIB
" TERMINAL 2 " TERMINALS 4, 1, OF THE CENTER AIRBAG SENSOR ASSEMBLY " TERMINAL 5, TERMINAL 6 OR BODY GROUND
" GROUND.
WHEN THE SAFING SENSOR BUILT INTO THE CENTER AIRBAG SENSOR ASSEMBLY IS ON AND THE FRONT AIRBAG SENSOR LH OR
RH IS ON, CENTER AIRBAG SENSOR IS OFF AND CURRENT FROM THE CIG OR IGN FUSE FLOWS TO TERMINALS 3, 2, OF THE
CENTER AIRBAG SENSOR ASSEMBLY " TERMINAL 1 OF THE AIRBAG SQUIB " TERMINAL 2 " TERMINALS 4, 1, OF THE CENTER
AIRBAG SENSOR ASSEMBLY " TERMINAL 8 OR 11 " TERMINAL 1 OF THE FRONT AIRBAG SENSOR " TERMINAL 2 " TERMINAL 9
OR 10 OF THE CENTER AIRBAG SENSOR ASSEMBLY " TERMINAL 5, TERMINAL 6 OR BODY GROUND " GROUND, WHEN THE
SAFING SENSOR BUILT INTO THE CENTER AIRBAG SENSOR ASSEMBLY IS ON, AND THE FRONT AIRBAG SENSOR LH OR RH IS ON
AND CENTER AIRBAG SENSOR IS ON ONE OF THE ABOVE±MENTIONED CIRCUITS IS ACTIVATED SO THAT CURRENT FLOWS TO
THE AIRBAG SQUIBS AND CAUSES THEN TO OPERATE.
THE AIRBAG STORED INSIDE THE STEERING WHEEL PAD IS INSTANTANEOUSLY EXPANDED TO SOFTEN THE SHOCK TO THE
DRIVER.
THE AIRBAG STORED INSIDE THE PASSENGER'S INSTRUMENT PANEL IS INSTANTANEOUSLY EXPANDED TO SOFTEN THE SHOCK
TO THE PASSENGER.
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A2728D 126 (2JZ±GE)F224 (2JZ±GTE)
A2828D 528F 226 (2JZ±GE)
C 528F124 (2JZ±GTE)T 629
D 124 (2JZ±GTE)F 126 (2JZ±GE)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1G20COWL WIRE AND J/B NO 1 (LEFT KICK PANEL)1J20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IF136INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IE36LEFT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I 538INSTRUMENT PANEL WIREI1438INSTRUMENT PANEL WIRE
SYSTEM OUTLINE

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)