1995 TOYOTA SUPRA Service Repair Manual

low beam oil level battery capacity oil dipstick steering wheel adjustment warning light

Page 1729 of 2543

TOYOTA SUPRA 1995 Service Repair Manual System normal
Source voltage drop
Short in squib circuit or front
airbag sensor circuit (to ground)
Front airbag sensor
center airbag sensor
assembly malfunction
Short in squib circuit (to B+)
O

System normal
Source voltage drop
Short in squib circuit or front
airbag sensor circuit (to ground)
Front airbag sensor
center airbag sensor
assembly malfunction
Short in squib circuit (to B+)
Open in front airbag sensor
circuits
Short in driver airbag squib circuit
(between D+ wire harness and D±
wire harness)
Open in driver airbag squib circuit
Open in front airbag sensor circuit
SRS warning light system mal±
function
Center airbag sensor assembly
malfunction
Short in front passenger airbag
squib circuit
Open in front passenger airbag
squib circuit
Battery
Center airbag sensor assembly
Squib (driver airbag and front pas±
senger airbag)
Front airbag sensor
Spiral cable
Center airbag sensor assembly
Wire harness
Squib (driver airbag and front pas±
senger airbag)
Front airbag sensor
Spiral cable
Center airbag sensor assembly
Wire harness
Steering wheel pad (squib)
Spiral cable
Center airbag sensor assembly
Wire harness
Steering wheel pad (squib)
Spiral cable
Center airbag sensor assembly
Wire harness
Front airbag sensor
Center airbag sensor assembly
Wire harness
SRS warning light
Center airbag sensor assembly
Wire harness
Center airbag sensor assembly
Front passenger airbag assembly
(squib)
Center airbag sensor assembly
Wire harness
Front passenger airbag assembly
(squib)
Center airbag sensor assembly
Wire harness
HINT:
*
1
wWhen the SRS warning light remains lit up and the diagnostic trouble code is the normal code, this means
a source voltage drop.
This malfunction is not stored in memory by the center airbag sensor assembly and if the power source
voltage returns to normal, after approx. 10 seconds the SRS warning light will automatically go out.
*
2
wCode 22 is recorded when a malfunction occurs in the SRS warning light system.
If an open malfunction occurs in the SRS warning light system, the SRS warning light does not light up,
so that until the malfunction is repaired, the diagnostic trouble codes (including code 22) cannot be con-
firmed.
wWhen 2 or more codes are indicated, the lowest numbered code will appear first.
wIf a code not listed on the chart is displayed, the center airbag sensor assembly is faulty. RS±46
± SUPPLEMENTAL RESTRAINT SYSTEMTROUBLESHOOTING

Page 1730 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Diagnostic trouble code clearance
Using diagnosis check wire:
(a) Connect the 2 service wires to terminals Tc and AB of DLC1
or DLC2.
(b) Turn the ignition switch to ACC or ON and wait approx. 6
se

Page 1731 of 2543

TOYOTA SUPRA 1995 Service Repair Manual CONNECTORS
Slightly shake the connector vertically and horizontally.
Inspection of connectors
(a) Does the wire harness connecting with its corresponding
part have insufficient slack?
(b) Are the term

Page 1732 of 2543

TOYOTA SUPRA 1995 Service Repair Manual When the problem seems to occur when the suspect
area is heated.HEAT METHOD:
Heat the component that is likely the cause of the mal-
function with a hair dryer or similar object. Check to see
if the

Page 1733 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DIAGNOSTIC TROUBLE CODE MATRIX CHART
If a malfunction code is displayed during the diagnostic trouble code check, check the circuit listed for that code
in the table below (Proceed to the page given f

DIAGNOSTIC TROUBLE CODE MATRIX CHART
If a malfunction code is displayed during the diagnostic trouble code check, check the circuit listed for that code
in the table below (Proceed to the page given for that circuit.).

DTC No.
Diagnosis
Page
(Normal)*1 Source voltage drop RS±52

11

Short in squib circuit or front airbag sensor circuit (to ground)

Front airbag sensor or center airbag sensor assembly malfunction

RS±54

12

Short in squib circuit (to B+)

Open in front airbag sensor circuits

RS±60
13 Short in D squib circuit (between D+ wire harness and D± wire harness) RS±66

14

Open in D squib circuit

RS±73

15

Open in front airbag sensor circuit

RS±78

22*2
SRS warning light system malfunction
RS±82
31 Center airbag sensor assembly malfunction RS±86

53

Short in P squib circuit

RS±87

54

Open in P squib circuit

RS±92
HINT:
*1 When the SRS warning light remains lit up and the diagnostic trouble code is the normal code, this means
a source voltage drop.
*
2 Code 22 is recorded when a malfunction occurs in the SRS warning light system.
If an open malfunction occurs in the SRS warning light system, the SRS warning light does not light up, so
that until the malfunction is repaired, the diagnostic trouble codes (including code 22) cannot be confirmed.
PROBLEM SYMPTOM CHART
Proceed with troubleshooting of each circuit in the table below.
RS±96
RS±98
Problem SymptomInspection ItemPage
Tc terminal circuit
SRS warning light system
Always lit up, when ignition
switch is in LOCK position.
With the ignition switch at ACC or ON, the SRS warning light
sometimes lights up after approx. 6 seconds have elapsed.
SRS warning light is always lit up even when ignition switch
is in the LOCK position.
Diagnostic trouble code not displayed.
SRS warning light is always lit up with the DTC check procedure.
Diagnostic trouble code displayed without Tc and E1 terminal
correction.
RS±50± SUPPLEMENTAL RESTRAINT SYSTEMTROUBLESHOOTING

Page 1734 of 2543

TOYOTA SUPRA 1995 Service Repair Manual CENTER AIRBAG SENSOR ASSEMBLY CONNECTOR
No. Symbol Terminal Name
A ±±

CENTER AIRBAG SENSOR ASSEMBLY CONNECTOR
No. Symbol Terminal Name
A ±± Electrical Connection Check Mechanism
B ±± Electrical Connection Check Mechanism
1

P±
Squib (Front Passenger)
2 P+ Squib (Front Passenger)
3 D+ Squib (Driver)
4 D± Squib (Driver)
5

E1

Ground
6 E2 Ground
7 Tc Diagnosis
8 +SL Front Airbag Sensor LH
9

±SL

Front Airbag Sensor LH
10 ±SR Front Airbag Sensor RH
11 +SR Front Airbag Sensor RH
12 LA SRS Warning Light
13
IG2

Power Source (IGN Fuse)
14 ACC Power Source (CIG Fuse)
± SUPPLEMENTAL RESTRAINT SYSTEMTROUBLESHOOTINGRS±51

Page 1735 of 2543

TOYOTA SUPRA 1995 Service Repair Manual CIRCUIT INSPECTION
DTC (Normal) Source Voltage Drop
CIRCUIT DESCRIPTION
The SRS is equipped with a voltage±increase circuit (DC±DC converter) in the center airbag sensor assembly
in case the source

Page 1736 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INSPECTION PROCEDURES [P] Preparation [C] Check
(1) Turn ignition switch to LOCK.
(2) Disconnect center airbag sensor assembly con±
nector.
(3) Turn ignition swit

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