1995 TOYOTA SUPRA instrument panel

When the vehicle is involved in a frontal collision in the
hatched area (Fig. 1) and the shock is larger than a predeter-
mined level, the SRS is activated automatically. A safing sen-
sor is designed to go on at a smaller deceleration rate than
the front and center airbag sensors. As illustrated in Fig. 2,
ignition is caused when current flows to the squib, which hap-
pens when a safing sensor and a front airbag sensor and/or
the center airbag sensor go on simultaneously. When a de-
celeration force acts on the sensors, two squibs in the driver
airbag and front passenger airbag ignite and generate gas.
The gas discharging into the driver and front passenger air-
bags rapidly increases the pressure inside the bags, break-
ing open the steering wheel pad and instrument panel door.
Bag inflation then ends, and the bags deflate as the gas is
discharged through discharge holes at the bag's rear or side. RS±8
± SUPPLEMENTAL RESTRAINT SYSTEMOPERATION

FRONT PASSENGER AIRBAG
ASSEMBLY
INSPECTION ITEMS
1. VEHICLES NOT INVOLVED IN A COLLISION
(a) Do a diagnostic system check. (See page RS±44)
(b) Do a visual check which includes the following items with the
front passenger airbag assembly installed in the vehicle.
wCheck for cuts, minute cracks or marked discoloration
of the front passenger airbag door.
2. VEHICLE INVOLVED IN A COLLISION
IF THE AIRBAG IS NOT DEPLOYED
(a) Do a diagnostic system check. (See page RS±44)
(b) Do a visual check which includes the following items with the
airbag assembly removed from the vehicle.
wCheck for cuts and cracks in, or marked discoloration of
the front passenger airbag door.
wCheck for cuts and cracks in wire harnesses, and for
chipping in connectors.
wCheck for deformation of the instrument panel and
instrument panel reinforcement.
HINT:
wIf the instrument panel or instrument panel
reinforcement is deformed, never repair it. Always
replace it with a new one.
wThere should be no interference between the
instrument panel and front passenger airbag door. The
clearance should be uniform all the way around when
the new airbag assembly is installed on the instrument
panel.
CAUTION: For removal and installation of the front pas-
senger airbag assembly, see page RS±23, ºFRONT PAS-
SENGER AIRBAG ASSEMBLY REMOVAL AND INSTAL-
LATIONº and be sure to follow the correct procedure. RS±20
± SUPPLEMENTAL RESTRAINT SYSTEMFRONT PASSENGER AIRBAG ASSEMBLY

IF THE AIRBAG IS DEPLOYED
(a) Do a diagnostic system check. (See page RS±44)
(b) Do a visual check which includes the following items with the
airbag assembly removed from vehicle.
wCheck for deformation of the instrument panel and
instrument panel reinforcement.
wCheck for damage to the connector and wire harness.
HINT:
wIf the instrument panel or instrument panel
reinforcement is deformed, never repair it. Always
replace it with a new one.
wThere should be no interference between the
instrument panel and front passenger airbag door. The
clearance should be uniform all the way around when
the new airbag assembly is installed on the instrument
panel.
REPLACEMENT REQUIREMENTS
In the following case, replace the front passenger airbag as-
sembly, instrument panel and instrument panel reinforce-
ment.
wIf the airbag has been deployed.
wIf the front passenger airbag assembly has been found
to be faulty in troubleshooting.
wIf the front passenger airbag assembly, instrument
panel or instrument panel reinforcement has been
found to be faulty during the check in items 1±(b) or
2±(b).
wIf the front passenger airbag assembly has been
dropped.
CAUTION: For replacement of the front passenger airbag
assembly, see page RS±23, ªFRONT PASSENGER AIR-
BAG ASSEMBLY REMOVAL AND INSTALLATIONº and
be sure to follow the correct procedure.
± SUPPLEMENTAL RESTRAINT SYSTEMFRONT PASSENGER AIRBAG ASSEMBLYRS±21

FRONT PASSENGER AIRBAG
ASSEMBLY REMOVAL AND
INSTALLATION
NOTICE:
wIf the wiring connector of the SRS is disconnected with
the ignition switch at ON or ACC, diagnostic trouble
codes will be recorded.
wNever use airbag parts from another vehicle. When
replacing parts, replace with new parts.
1. DISCONNECT AIRBAG CONNECTOR
(a) Remove negative (±) terminal cable from the battery, and
wait at least 90 seconds.
(b) Remove the glove compartment door finish plate inside the
instrument panel box.
NOTICE: When handling the airbag connector, take care
not to damage the airbag wire harness.
(c) Pull up the connector.
(d) Disconnect the airbag connector.
2. REMOVE THESE PARTS:
(a) Instrument panel box
(See page BO±49)
(b) Heater to register duct No. 4
3. REMOVE FRONT PASSENGER AIRBAG ASSEMBLY
(a) Remove the 4 bolts.
(b) Pull the front passenger airbag assembly to remove it.
CAUTION:
wDo not store the front passenger airbag assembly with
the airbag door facing down.
wNever disassemble the front passenger airbag assembly.
4. INSTALL FRONT PASSENGER AIRBAG ASSEMBLY
(a) Install the front passenger airbag assembly.
(b) Install the 2 bolts to instrument panel reinforcement.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
(c) Install the 2 bolts to instrument panel.
Torque: 8.8 NVm (90 kgfVcm, 78 in.Vlbf)
NOTICE:
wMake sure the front passenger airbag assembly is
installed to the specified torque.
± SUPPLEMENTAL RESTRAINT SYSTEMFRONT PASSENGER AIRBAG ASSEMBLYRS±23

wIf the front passenger airbag assembly has been
dropped, or there are cracks, dents or other defects in the
case or connector, replace the front passenger airbag
assembly with a new one.
wAdhesive has been applied to the 2 instrument panel
bolts. When the front passenger airbag assembly is
removed, always replace the bolts with new ones.
wWhen installing the front passenger airbag assembly,
take care that the wirings do not interfere with other parts
and are not pinched between other parts.
5. INSTALL THESE PARTS:
(a) Heater to register duct No. 4
(b) Instrument panel box
(See page BO±49)
NOTICE: When installing the instrument panel box, care-
fully pull out the airbag wire harness from the glove
compartment upper hole.
6. CONNECT AIRBAG CONNECTOR
(a) Connect the airbag connector.
(b) Put the connector on the glove compartment door finish
plate.
(c) Install the glove compartment door finish plate to the
instrument panel box. RS±24
± SUPPLEMENTAL RESTRAINT SYSTEMFRONT PASSENGER AIRBAG ASSEMBLY

When scrapping vehicle
HINT: Have a battery ready as the power source to deploy the
airbag.
1. CONFIRM FUNCTIONING OF SST
(See page RS±19)
SST 09082±00700
2. DISCONNECT AIRBAG CONNECTOR
(a) Remove the glove compartment finish plate inside the
instrument panel box.
NOTICE: When handling the airbag connector, take care
not to damage the airbag wire harness.
(b) Pull up the connector.
(c) Disconnect the airbag connector.
3. INSTALL SST
(a) Connect the SST connector to the front passenger airbag
assembly connector.
SST 09082±00700
NOTICE: To avoid damaging the SST connector and wire
harness, do not lock the secondary lock of the twin lock.
(b) Move the SST to at least 10 m (33 ft) from the front of the
vehicle.
(c) Close all the doors and windows of the vehicle.
NOTICE: Take care not to damage the SST wire harness.
(d) Connect the SST red clip to the battery positive (+) terminal
and the black clip to the battery negative (±) terminal.
4. DEPLOY AIRBAG
(a) Confirm that no±one is inside the vehicle or within 10 m
(33 ft) of the vehicle.
(b) Press the SST activation switch and deploy the airbag.
HINT: The airbag deploys simultaneously as the LED of the
SST activation switch lights up. RS±26
± SUPPLEMENTAL RESTRAINT SYSTEMFRONT PASSENGER AIRBAG ASSEMBLY

SERVICE SPECIFICATIONS
SERVICE DATA
 
 FRONT AIRBAG SENSOR
 
 
 
S ±
A 755±885

 
S ± S 1 M
or Higher
 S ± A Less than 1

TORQUE SPECIFICATIONS
 
Part tightened 
NVm 
kgfVcm 
ftVlbf 
 Steering wheel
 
 35
 
 360
 
 26
 Steering wheel pad 7.1 72 62 in.Vlbf
 Front passenger airbag assembly x Instrument panel reinforcement 21 210 15
 Front passenger airbag assembly x Instrument panel 8.8 90 78 in.Vlbf 
 Front airbag sensor
 
 29
 
 300
 
 22
 Airbag sensor assembly 21 210 15
RS±102± SUPPLEMENTAL RESTRAINT SYSTEMSERVICE SPECIFICATIONS

DIAGNOSIS SYSTEM
DESCRIPTION
The ECM contains a built±in self±diagnosis system by which
troubles with the engine signal network are detected and a Mal-
function Indicator Lamp on the instrument panel lights up.
By analyzing various signals as shown in a later table (See page
EG±388) the Engine Control Module (ECM) detects system mal-
functions relating to the sensors or actuators.
In the normal mode, the self±diagnosis system monitors 18
(California specification vehicles) or 17 (except for California and
Canadian specification) items, indicated by code No. as shown in
EG±388. A malfunction indicator lamp informs the driver that a
malfunction has been detected. The lamp goes off automatically
when the malfunction has been repaired, but the diagnostic
trouble code(s) remains stored in the ECM memory (except for
code Nos. 16 and 53). The ECM stores the code(s) until it is
cleared by removing the EFI No. 1 fuse with the ignition switch
OFF.
The diagnostic trouble code can be read by the number of blinks
of the malfunction indicator lamp when TE1 and E1 terminals on
the data link connector 1 or 2 are connected. When 2 or more
codes are indicated, the lowest number (code) will appear first.
In the test mode, 12 (California specification vehicles) or 11 (ex-
cept for California and Canadian specification vehicles) items, in-
dicated by code No. as shown in EG±388 are monitored. If a mal-
function is detected in any one of the systems indicated by code
Nos. 13, 21, 22, 24, 25, 26, 27, 28, 35, 41, 71 and 78 (California
specification vehicles) or 13, 21, 22, 24, 25, 28, 35, 41, 71 and 78
(except for California and Canadian specification vehicles) the
ECM lights the malfunction indicator lamp to warn the technician
that a malfunction has been detected. In this case, TE2 and E1
terminals on the data link connector 2 should be connected as
shown later. (See page EG±386).
In the test mode, even if the malfunction is corrected, the malfunc-
tion code is stored in the ECM memory even when the ignition
switch OFF (except code Nos. 43 and 51). This also applies in the
normal mode. The diagnostic trouble mode (normal or test) and
the output of the malfunction indicator lamp can be selected by
connecting the TE1, TE2 and E1 terminals on the data link con-
nector 2, as shown later.
A test mode function has been added to the functions of the self±
diagnosis system of the normal mode for the purpose of detecting
malfunctions such as poor contact, which are difficult to detect in
the normal mode. This function fills up the self±diagnosis system.
The test mode can be implemented by the technician following the
appropriate procedures of check terminal connection and opera-
tion described later. (See page EG±386) EG±384
± ENGINE2JZ±GE ENGINE TROUBLESHOOTING