1995 TOYOTA SUPRA warning lights

CUSTOMER PROBLEM ANALYSIS CHECK SHEET
 Supplemental Restraint System Check Sheet
Inspector 's
Name:
   Registration No. 
 Customer 's Name  Registration Year //
   Frame No. 
 
 
Date Vehicle
Brought In 
 //
 
 Odometer Reading
 
 
km
Miles
 
 
Date Problem First Occurred 
 //
 Weather 
Fine
Cloudy
Rainy
Snowy
Other_ _ _ _ _ _ _
 Temperature Approx.°C (°F) p A rox.C (F)
 
 
 
Vehicle Operation
 
 
 

Starting
Idling

Driving [
Constant speed
Acceleration
Deceleration

Other_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ]
 
 
 
Road Conditions
 
 
 
 
 
 
 
 
 
Details of Problem
 
 
 
 
 
 
 
 
 
 
 
 
 
Vehicle Inspection, Repair History
Prior to Occurrence of Malfunction
(Including Supplemental Restraint
System)
 
 
 
 
 
 
 
Diagnosis System Inspection
 
 SRS Warning Light
 
 1st Time
 
 
Remains ON
Sometimes Lights Up
Does Not Light Up
 Inspection 2nd Time 
Remains ON
Sometimes Lights Up
Does Not Light Up
 Diagnostic Trouble 1st Time 
Normal Code
Malfunction Code [Code ]
 Code Inspection 2nd Time 
Normal Code
Malfunction Code [Code. ]
± SUPPLEMENTAL RESTRAINT SYSTEMTROUBLESHOOTINGRS±43

DIAGNOSIS INSPECTION
SRS warning light check
(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:
wWhen the ignition switch is at ACC or ON and the SRS
warning light remains on or flashes, the center airbag
sensor assembly has detected a malfunction code.
wIf, after approx. 6 seconds have elapsed, the SRS
warning light sometimes lights up or the SRS warning
light light 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 systemº on page
RS±97.
Diagnostic trouble code check
Using diagnosis check wire:
1. OUTPUT DIAGNOSTIC TROUBLE CODE
(a) Turn the ignition switch to ACC or ON position and wait
approx. 20 seconds.
(b) Using SST, connect terminals Tc and E
1 of the DLC1 or
DLC2.
SST 09843±18020
NOTICE: Never make a mistake with the terminal connec-
tion position as this will cause a malfunction. RS±44
± SUPPLEMENTAL RESTRAINT SYSTEMTROUBLESHOOTING

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

DTC 22 SRS Warning Light System Malfunction
CIRCUIT DESCRIPTION
The SRS warning light is located on the cluster finish panel.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the ignition switch is turned
from LOCK position to ACC or ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to inform the driver of the abnormality. When
terminals Tc and E
1 of the DLC1 or DLC2 are connected, the diagnostic trouble code is displayed by the blinking
of the SRS warning light.
The SRS warning light circuit is equipped with an electrical connection check mechanism which detects when
the connector to the center airbag sensor assembly is not properly connected.
If the connector to the center airbag sensor assembly is not properly connected, the SRS warning light will not
light up.
Diagnostic trouble 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.
 
DTC No. 
Diagnosis 
 
 
22
 
 
 

Open circuit in SRS warning light system.


Center airbag sensor assembly malfunction.
RS±82± SUPPLEMENTAL RESTRAINT SYSTEMTROUBLESHOOTING

SRS Warning Light System (Always lit up when ignition switch is in
Lock position.)
CIRCUIT DESCRIPTION
The SRS warning light is located on the cluster finish panel.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the ignition switch is turned
from LOCK position to ACC or ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to inform the driver of the abnormality. When
terminals Tc and E
1 of the DLC1 or DLC2 are connected, the diagnostic trouble code is displayed by the blinking
of the SRS warning light.
RS±96± SUPPLEMENTAL RESTRAINT SYSTEMTROUBLESHOOTING