Page 873 of 1807

R05901R14286
H07919
P squib
Spiral
CableAirbag Sensor
Assembly
D squib
D-D+
(-) (+)
DI-582
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
810 Author: Date:
1997 SUPRA (RM502U)
DTC 14 Open in D Squib Circuit
CIRCUIT DESCRIPTION
The D squib circuit consists of the airbag sensor assembly, spiral cable and steering wheel pad.
It causes the airbag to deploy when the airbag deployment conditions are satisfied.
For details of the function of each component, see FUNCTION OF COMPONENTS on page RS-2.
DTC 14 is recorded when an open is detected in the D squib circuit.
DTC No.DTC Detecting ConditionTrouble Area
14
Open circuit in D+
wire harness or D- wire harness of squib.
D squib malfunction.
Spiral cable malfunction.
Airbag sensor assembly malfunction.Steering wheel pad (D squib)
Spiral cable
Airbag sensor assembly
Wire harness
WIRING DIAGRAM
Refer to page DI-577 for the WIRING DIAGRAM.
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 D-.
OK:
Resistance: Below 1W
NG Go to step 5.
OK
DI4WN-01
Page 874 of 1807

R05895AB0069AB0118AB0119FI1391N19819H07920
P squibAirbag Sensor
Assembly
D squib
Spiral
Cable
ACC
ON
or
E
1
Tc DLC1
Code 14
D+D-
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-583
811 Author: Date:
1997 SUPRA (RM502U)
3 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) Connect negative (-) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a) Turn the ignition switch to LOCK, and wait at least 20 se-
conds.
(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 14 is not output.
HINT:
Codes other than code 14 may be output at this time, but they
are not relevant to this check.
NG Replace airbag sensor assembly.
OK
Page 875 of 1807

H03231
P squib
Spiral
CableAirbag Sensor
Assembly
D squib
ACCON
or
E
1
DLC1
Code 14
Tc
DI-584
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
812 Author: Date:
1997 SUPRA (RM502U)
4 Check D squib.
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
and wait at least 90 seconds.
(c) Connect the steering wheel pad connector.
(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 14 is not output.
HINT:
Codes other than code 14 may be output at this time, but they
are not relevant to this check.
NG Replace steering wheel pad.
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check.
Page 876 of 1807

R05899R14286H07921
P squib
Spiral
CableAirbag Sensor
Assembly
D squib
D-D+
(-)(+)
R05904R14286H03814
P squib
Spiral
CableAirbag Sensor
Assembly
D squib
D+
(-) (+)D
-
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-585
813 Author: Date:
1997 SUPRA (RM502U)
5 Check spiral cable.
PREPARATION:
Disconnect the connector between airbag sensor assembly
and spiral cable.
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and steering wheel pad, measure the resistance between
D
+ and D-.
OK:
Resistance: Below 1 W
NG Repair or replace spiral cable.
OK
6 Check harness between airbag sensor assembly and spiral cable.
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the airbag sensor assembly and spiral cable, measure
the resistance between D
+ and D-.
OK:
Resistance: Below 1W
NG Repair or replace harness or connector be-
tween airbag sensor assembly and spiral cable.
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check.
Page 877 of 1807

AB0119
W02766H00041
ONAirbag Sensor Assembly
ACC
IG2 (-)
(+)
DI-586
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
814 Author: Date:
1997 SUPRA (RM502U)
DTC 31 Airbag Sensor Assembly Malfunction
CIRCUIT DESCRIPTION
The airbag sensor assembly consists of a airbag sensor, safing sensor, drive circuit, diagnosis circuit and
ignition control, etc.
It receives signals from the airbag sensors, judges whether or not the SRS must be activated, and diagnosis
system malfunction.
DTC 31 is recorded when occurrence of a malfunction in the airbag sensor assembly is detected.
DTC No.DTC Detecting ConditionTrouble Area
31Airbag sensor assembly malfunction.Airbag sensor assembly
INSPECTION PROCEDURES
HINT:
When a malfunction code other than code 31 is displayed at the same time, first repair the malfunction indi-
cated by the malfunction code other than code 31.
1 Preparation (See step 1 on page DI-595).
2 Check voltage at IG2 and ACC of airbag sensor assembly.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals IG2 and ACC of airbag
sensor assembly and body ground.
OK:
Voltage: Below 16 V
NG Check battery and charging system.
(See charging system section)
OK
DI4WO-01
Page 878 of 1807
H03232
ACC
ON
or
DLC1
Code 31
E
1Tc
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-587
815 Author: Date:
1997 SUPRA (RM502U)
3 Is DTC 31 output again?
PREPARATION:
Clear malfunction code.
CHECK:
(a) Turn the ignition switch to LOCK, and wait at least 20 se-
conds.
(b) Turn the ignition switch to ACC or ON, and wait at least
20 seconds.
(c) Repeat operation in step (1) and (2) at least 5 times.
(d) Using SST, connect the terminals Tc and E
1 of DLC1.
SST 09843-18020
(e) Check DTC.
NO Using simulation method, reproduce malfunc-
tion symptoms (See page IN-18).
YES
Replace airbag sensor assembly.
Page 879 of 1807
R16016
P squibAirbag Sensor
Assembly
1
2L
Y2 3
P
+
P- A34
A34
DI-588
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
816 Author: Date:
1997 SUPRA (RM502U)
DTC 53 Short in P Squib Circuit
CIRCUIT DESCRIPTION
The P squib circuit consists of the airbag sensor assembly and front passenger airbag assembly.
It causes the airbag to deploy when the airbag deployment conditions are satisfied.
For details of the function of each component, see FUNCTION OF COMPONENTS on page RS-2.
DTC 53 is recorded when a short is detected in the P squib circuit.
DTC No.DTC Detecting ConditionTrouble Area
53
Short circuit between P+
wire harness or P- wire harness of
squib.
P squib malfunction.
Airbag sensor assembly malfunction.Front passenger airbag assembly (P squib)
Airbag sensor assembly
Wire harness
WIRING DIAGRAM
DI4WP-01
Page 880 of 1807
R05898R14287H07922
P squib
Spiral
CableAirbag Sensor
Assembly
D squib
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-589
817 Author: Date:
1997 SUPRA (RM502U)
INSPECTION PROCEDURES
1 Preparation (See step 1 on page DI-595).
2 Check P squib circuit.
PREPARATION:
Release airbag activation prevention mechanism on airbag
sensor assembly side of airbag squib connector
(See page DI-557)
CHECK:
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 P-.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector be-
tween airbag sensor assembly and front pas-
senger airbag assembly.
OK