1995 TOYOTA SUPRA warning

INSPECTION PROCEDURES [P] Preparation [C] Check
Does SRS warning light turn off?
(1) Turn ignition switch to LOCK.
(2) Disconnect negative (±) terminal cable from the
battery, and wait at least 90 seconds.
(3) Disconnect center airbag sensor assembly
connector.
(4) Connect negative (±) terminal cable to battery.
Check operation of SRS warning light.
Replace center airbag sensor assembly.
Check SRS warning light circuit or terminal AB cir-
cuit of DLC1 or DLC2.
± SUPPLEMENTAL RESTRAINT SYSTEMTROUBLESHOOTINGRS±97

Tc Terminal Circuit
CIRCUIT DESCRIPTION
By connecting terminals Tc and E1 of the DLC1 or DLC2, the center airbag sensor assembly is set in the diagnos-
tic trouble code output mode. The diagnostic trouble codes are displayed by the blinking of the SRS warning
light.
RS±98± SUPPLEMENTAL RESTRAINT SYSTEMTROUBLESHOOTING

Does SRS warning light light up for approx. 6 seconds?
Check operation of SRS warning light after ignition
switch turned from LOCK position to ACC or ON
position.
Check SRS warning light system.
(See page RS±44)
Check voltage between terminals Tc and E1 of DLC1 and DLC2.
Turn ignition switch to ACC or ON.
Measure voltage between terminals Tc and E
1 of
DLC1 or DLC2.
Voltage: Battery positive voltage
INSPECTION PROCEDURES [P] Preparation [C] Check
HINT: If the diagnostic trouble code is not displayed, do the following troubleshooting:
± SUPPLEMENTAL RESTRAINT SYSTEMTROUBLESHOOTINGRS±99

Check voltage between terminals Tc of DLC1 or DLC2 and body ground.
Measure voltage between terminals Tc of DLC1 or
DLC2 and body ground.
Voltage: Battery positive voltage
Check harness between terminals E1 of DLC1
or DLC2 and body ground.
Check center airbag sensor assembly.
(1) Turn ignition switch to LOCK.
(2) Disconnect negative (±) terminal cable from the
battery, and wait at least 90 seconds.
(3) Disconnect center airbag sensor assembly con±
nector.
(4) Insert test probe into terminal Tc from back side as
shown.
(5) Connect center airbag sensor assembly con±
nector with check pin.
(6) Connect negative (±) terminal cable to battery.
(7) Turn ignition switch to ACC or ON and wait at
least 20 seconds.
(8) Using service wire, connect test probe of termi±
nal Tc to body ground.
Check operation SRS warning light.
SRS warning light comes on.
NOTICE: Never made a mistake with the terminal
connection position as this will cause a malfunc-
tion.
Check harness between center airbag sensor
assembly and DLC1 or DLC2.
Replace center airbag sensor assembly. RS±100
± SUPPLEMENTAL RESTRAINT SYSTEMTROUBLESHOOTING