Page 848 of 1807
DI4WF-01
R06853
H03184
E1Tc
TcE
1
DLC 1
DLC 2
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-557
785 Author: Date:
1997 SUPRA (RM502U)
PRE-CHECK
1. CHECK SRS WARING LIGHT
(a) Turn the ignition switch to ACC or ON and check that the
SRS warning light lights up.
(b) Check that the SRS warning light goes out after approx.
6 seconds.
HINT:
When the ignition switch is at ACC or ON and the SRS
warning light remains on or flashes, the airbag sensor as-
sembly has detected a malfunction code.
If, after approx. 6 seconds have elapsed, the SRS warn-
ing light sometimes lights up or the SRS warning light
lights up even when the ignition switch is OFF, a short in
the SRS warning light circuit can be considered likely.
Proceed to ºSRS warning light system malfunctionº on
page DI-598, DI-600.
2. CHECK DTC (Using diagnosis check wire)
(a) Using diagnosis check wire, check the output of DTC.
(1) Turn the ignition switch to ACC or ON position and
wait approx. 20 seconds.
(2) Using SST, connect the terminals Tc and E
1 of the
DLC1.
HINT:
DTC check and troubleshooting of each DTC can also be done
using DLC2.
SST 09843-18020
NOTICE:
Never make a mistake with the terminal connection posi-
tion as this will cause a malfunction.
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 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
Page 857 of 1807
R05898R14301H07910
P squibAirbag Sensor
Assembly
D squib
P
+
Spiral
Cable
DI-566
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
794 Author: Date:
1997 SUPRA (RM502U)
3 Check P squib circuit.
PREPARATION:
For the connector (on the airbag sensor assembly side) be-
tween the airbag sensor assembly and front passenger airbag
assembly, measure the resistance between P
+ and body
ground.
OK:
Resistance: 1 MW or higher
NG Repair or replace harness or connector be-
tween the airbag sensor assembly and front
passenger airbag assembly.
OK
Page 858 of 1807
AB0069R05902AB0118AB0119AB0057
AB0069
N19819H07911
P squibAirbag Sensor
Assembly
D squibSpiral
Cable
ACC
ON
or
E
1Tc DLC1
Code 11
P+P-
D+D-
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-567
795 Author: Date:
1997 SUPRA (RM502U)
4 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to airbag sensor assembly.
(b) Using a service wire, connect D
+ and D- on spiral cable
side of connector between spiral cable and steering
wheel pad.
(c) Using a service wire, connect P
+ and P- on airbag sensor
assembly side of connector between airbag sensor as-
sembly and front passenger airbag assembly.
(d) Connect negative (-) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a) Turn the ignition switch to ACC or ON and wait at least 20
seconds.
(b) Clear malfunction code stored in memory.
(See page DI-557)
(c) Turn the ignition switch to LOCK, and wait at least 20 se-
conds.
(d) Turn the ignition switch to ACC or ON, and wait at least
20 seconds.
(e) Using SST, connect the terminals Tc and E
1 of DLC1.
SST 09843-18020
(f) Check DTC.
OK:
DTC 11 is not output.
HINT:
Codes other than code 11 may be output at this time, but they
are not relevant to this check.
NG Replace airbag sensor assembly.
OK
