1997 TOYOTA SUPRA steering

SRS AIRBAG COMPONENT REPLACEMENT (cont'd) PAGE 5 of 6
Component Replacement Notes
Note 1 ± Replace the following items:

Instrument panel

Center console bracket support
Note 2 ± Replace the following items if deformed:

Instrument panel

Instrument panel reinforcement

Glove compartment

Glove compartment door
Note 3 ± Replace the following items:

Instrument panel reinforcement

Glove compartment

Glove compartment door
Note 3a ± Replace the following items:

Instrument panel

Instrument panel reinforcement

Glove compartment door
Note 4 ± If the SRS wire harness assembly is damaged:

Use a repair wire specially designed for use in the SRS airbag system at the front
sensor (P/N 82988±24010).
OR

Replace the entire wire harness assembly.
Note 4a ± Replace wire harness if damaged.

Repair only if wire harness connector is damaged.
Note 4b ± Replace wire harness if damaged.
Note 5 ± Replace the following items if deformed:

Steering wheel

Spiral cable
Note 6 ± Replace center airbag sensor assembly if:

Center airbag sensor assembly has been found faulty in troubleshooting

Center airbag sensor assembly has been found faulty during the following checks:
1. Deformation of the bracket or case
2. Vinyl seal broken
3. Damage to connector

Center airbag sensor assembly has been dropped.

A00714
ONCheck Harness A
ECM
A2 SP1(+)
AT7809
4.5 - 5.5 V
0Turn the wheel
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-239
467 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION PROCEDURE
1 Check operation of speedometer.
CHECK:
Drive the vehicle and check if the operation of the speedometer in the combination meter is normal.
HINT:
The No.1 vehicle speed sensor is operating normally if the speedometer display is normal.
NG Check speedometer circuit (See page BE-43).
OK
2 Check voltage between terminal SP1 of ECM connector and body ground.
PREPARATION:
(a) Shift the shift lever to neutral position.
(b) Jack up one of rear wheels.
(c) Connect Check Harness A (See page DI-164).
(d) Disconnect power steering ECU connector and cruise
control ECU connector.
(e) Turn ignition switch ON.
CHECK:
Measure voltage between terminal SP1 of ECM connector and
body ground when rear wheel is turned slowly.
OK:
Voltage is generated intermittently.
NG Check and repair harness and connector be-
tween combination meter and ECM.
OK
Check and replace ECM (See page IN-28).

F03329
R00948
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
DI-473
701 Author
: Date
:
1997 SUPRA (RM502U)
3 Check sensor rotor and sensor installation.
Front
PREPARATION:
Remove front speed sensor rotor (See page SA-12).
CHECK:
Check sensor rotor serrations.
OK:
No scratches, missing teeth or foreign objects.
CHECK:
Check the front speed sensor installation.
OK:
The installation bolt is tightened properly and there is
no clearance between sensor and steering knuckle.
CHECK:
Check the sensor tip.
OK:
No scratches or foreign objects on the sensor tip.
Rear
PREPARATION:
Remove the drive shaft (See page SA-43).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches or missing teeth.

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.

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 drop
Battery

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 circuit
Steering wheel pad (D squib)

Spiral cable

Airbag sensor assembly

Wire harness
ON
14
(DI-582)

Open in D squib circuit
Steering wheel pad (D squib)

Spiral cable

Airbag sensor assembly

Wire harness
ON
31
(DI-586)
Airbag sensor assembly malfunction
Airbag sensor assemblyON
53
(DI-588)
Short in P squib circuit
Front passenger airbag assembly (P squib)

Airbag sensor assembly

Wire harness
ON
54
(DI-592)
Open in P squib circuit
Front 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.

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

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

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