Page 849 of 1807

AT0716
Normal Code
ON
OFF0.25
0.25
AB0056
code 11 and 31
ON
OFF0.5
2.5
4.0
1.5
0.5
Code 11Code 31Repeat
H03217
DI-558
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
786 Author: Date:
1997 SUPRA (RM502U)
(b) Read the DTC.
Read the 2-digit DTC as indicated by the number of times
the SRS warning light blinks. As an example, the blinking
patterns, normal, 11 and 31 are as shown on the illustra-
tion.
Normal code indication
The light will blink 2 times per second.
Malfunction code indication
The first blinking output indicates the first digit of a
2-digit DTC. After a 1.5 second pause, the second
blinking output will indicate the second digit.
If there are 2 or more codes, there will be a 2.5 second pause
between each code. After all the codes have been output, there
will be a 4.0 second pause and they will all be repeated.
HINT:
In the event of a number of trouble codes, indication will
start from the smallest numbered code.
If it does not output a DTC or outputs a DTC without termi-
nal connection, proceed to the Tc terminal circuit inspec-
tion on page DI-603.
3. CHECK DTC (Using TOYOTA hand-held tester)
(a) Hook up the TOYOTA hand-held tester to the check con-
nector.
(b) Read the DTCs by following the prompts on the tester
screen.
HINT:
Please refer to the TOYOTA hand-held tester operator's manu-
al, for further details.
4. CLEAR DTC (Using diagnosis check wire)
When the ignition switch is turned off, the DTC is cleared.
Page 850 of 1807

AB0130AB0045AB0046
W03146W03147
W01805
H09720
Connector (1)
Airbag Sensor
AssemblyFront Passenger
Airbag Assembly
No.1 J/B Spiral CableSteering Wheel
Pad (Squib) Connector (2)
Connector (3)
Connector (5)Connector (4)
Aibag Sensor Assembly Connector [Connector (1)]
Short SpringBefore Release After Release
Spiral Cable Connector [Connector (5)]
Short Spring Before Release
PaperAfter Release
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-559
787 Author: Date:
1997 SUPRA (RM502U)
5. RELEASE METHOD OF AIRBAG ACTIVATION PREVENTION MECHANISM
An airbag activation prevention mechanism is built into the connecter for the squib circuit of the SRS.
When release of the airbag activation prevention mechanism is directed in the troubleshooting procedure,
as shown in the illustration of the connectors (1) and 839 below, insert paper which is the same thickness
as the male terminal, between the terminal and the short spring.
CAUTION:
NEVER RELEASE the airbag activation prevention mechanism on the steering wheel pad con-
nector.
NOTICE:
Do not release the airbag activation prevention mechanism unless specifically directed by the
troubleshooting procedure.
If the paper inserted is too thick the terminal and short spring may be damaged, so always use
paper the same thickness as the male terminal.
Page 851 of 1807

DI4WG-01
DI-560
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
788 Author: Date:
1997 SUPRA (RM502U)
DIAGNOSTIC TROUBLE CODE CHART
DTC No.
(See Page)Detection ItemTrouble AreaSRS
Warning Light
(N l)System normal-OFF(Normal)
(DI-595)Source voltage dropBattery
Airbag sensor assemblyON
11
(DI-564)
Short in squib circuit (to ground)Steering wheel pad (D squib)
Front passenger airbag assembly (P squib)
Spiral cable
Airbag sensor assembly
Wire harness
ON
12
(DI-571)
Short in squib circuit (to B+)Steering wheel pad (D squib)
Front passenger airbag assembly (P squib)
Spiral cable
Airbag sensor assembly
Wire harness
ON
13
(DI-577)
Short in D squib circuitSteering wheel pad (D squib)
Spiral cable
Airbag sensor assembly
Wire harness
ON
14
(DI-582)
Open in D squib circuitSteering wheel pad (D squib)
Spiral cable
Airbag sensor assembly
Wire harness
ON
31
(DI-586)Airbag sensor assembly malfunctionAirbag sensor assemblyON
53
(DI-588)Short in P squib circuitFront passenger airbag assembly (P squib)
Airbag sensor assembly
Wire harness
ON
54
(DI-592)Open in P squib circuitFront passenger airbag assembly (P squib)
Airbag sensor assembly
Wire harness
ON
HINT:
When the SRS warning light remains lit up and the DTC is the normal code, this means a source voltage
drop.
This malfunction is not stored in memory by the airbag sensor assembly and if the power source volt-
age returns to normal, after approx. 10 seconds the SRS warning light will automatically go out.
When 2 or more codes are indicated, the codes will be displayed in numeral order starting from the
lowest numbered code.
If a code not listed on the chart is displayed, the airbag sensor assembly is faulty.
Page 852 of 1807
DI4WH-01
W02646
SRS Waring Light
(Telltale Light RH)
Front Passenger
Airbag Assembly
Steering Wheel Pad
(with Airbag)
Spiral Cable
Airbag Sensor Assembly
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-561
789 Author: Date:
1997 SUPRA (RM502U)
PARTS LOCATION
Page 853 of 1807
DI4WI-01
W02759
65 43
10921
7 8 BA
DI-562
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
790 Author: Date:
1997 SUPRA (RM502U)
TERMINALS OF ECM
No.SymbolTerminal Name
A-Electrical Connection Check Mechanism
B-Electrical Connection Check Mechanism
1P-Squib (Passenger)
2P+Squib (Passenger)
3LASRS Warning Light
4D-Squib (Driver)
5D+Squib (Driver)
6TcDiagnosis
7E2Ground
8E1Ground
9IG2Power Source (IGN Fuse)
10ACCPower Source (CIG Fuse)
Page 854 of 1807
DI4WJ-01
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-563
791 Author: Date:
1997 SUPRA (RM502U)
PROBLEM SYMPTOMS TABLE
Proceed with troubleshooting of each circuit in the table below.
Problem SymptomInspection ItemPage
WIth the ignition switch at ACC or ON, the SRS warning light
sometimes lights up after approx. 6 seconds have elapsed.
SRS warning light lights up even when ignition switch is in the
LOCK position.
SRS warning light system malfunction (Always lit up when
ignition switch is in LOCK position.)DI-598
WIth the ignition switch at ACC or ON, the SRS warning light
does not light up.SRS warning light system malfunction (Does not light up
when ignition switch is turned to ACC or ON.)DI-600
DTC not displayed.
SRS warning light is always lit up with a DTC check procedure.
DTC displayed without Tc and E
1 terminal connection.
Tc terminal circuitDI-603
Page 855 of 1807
DI4WK-01
W01021
P squib
D squib
A34
A34
A34
A34L
Y
R
WAirbag Sensor
Assembly
P+3
2
7
6 1
2
1
2D
+
D-
P-
Spiral
Cable
DI-564
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
792 Author: Date:
1997 SUPRA (RM502U)
CIRCUIT INSPECTION
DTC 11 Short in Squib Circuit (to Ground)
CIRCUIT DESCRIPTION
The squib circuit consists of the airbag sensor assembly, spiral cable, steering wheel pad and front passen-
ger airbag assembly. It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see FUNCTION OF COMPONENTS on page RS-2.
DTC 11 is recorded a when ground short is detected in the squib circuit.
DTC No.DTC Detecting ConditionTrouble Area
11
Short circuit in squib wire harness (to ground).
Squib malfunction.
Spiral cable malfunction.
Airbag sensor assembly malfunction.Steering wheel pad (D squib)
Front passenger airbag assembly (P squib)
Spiral cable
Airbag sensor assembly
Wire harness
WIRING DIAGRAM
Page 856 of 1807
R05894R14301H07909
P squibAirbag Sensor
Assembly
D squib
D
+
Spiral
Cable
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-565
793 Author: Date:
1997 SUPRA (RM502U)
INSPECTION PROCEDURES
1 Preparation (See step 1 on page DI-595).
2 Check D squib circuit.
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and steering wheel pad, measure the resistance between
D
+ and body ground.
OK:
Resistance: 1 MW or higher
NG Go to step 7.
OK