1996 TOYOTA T100 engine

Downloaded from www.Manualslib.com manuals search engine H01001H02142H02196
D SquibSpiral
Cable
(+)D+ D−
(−)Airbag
Sensor
Assembly
← →
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−385
1996 TOYOTA T100 (RM449U)
DTC 14 Open in D Squib Circuit
CIRCUIT DESCRIPTION
The D squib circuit consists of the center 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 components, see OPERATION 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
Center airbag sensor assembly malfunctionSteering wheel pad (D squib)
Spiral cable
Center airbag sensor assembly
Wire harness
WIRING DIAGRAM
See page DI−373.
INSPECTION PROCEDURE
1 Preparation (See step 1 on page DI−396)
2 Check D squib circuit.
PREPARATION:
(a) Disconnect center airbag sensor assembly connector.
(b) Using a service wire, connect D+ and D− on center airbag
sensor assembly side connector.
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 Ω
NG Go to step 5.
OK
DI987−01

Downloaded from www.Manualslib.com manuals search engine AB0118AB0119AB0069S08098
W05582
W02044H00338
Spiral
CableD Squib
ACC ON
D−D+
or
DLC1
E1
Tc
Code 14
Center Airbag
Sensor Assembly
DI−386
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
3 Check center airbag sensor assembly.
PREPARATION:
(a) Connect connector to center 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 ignition switch to ACC or ON, and wait at least 20 se-
conds.
(b) Clear malfunction code stored in memory (See page
DI−365).
(c) Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e) Using SST, connect terminals Tc and E1 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 relevant to this check.
NG Go to step 7.
OK

Downloaded from www.Manualslib.com manuals search engine AB0118AB0119S08098W02044
H00352
H00339
Center Airbag
Sensor Assembly
D Squib
Spiral
Cable
ACC ON
or
DLC1
E1
Tc
Code 14
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−387
1996 TOYOTA T100 (RM449U)
4 Check D squib.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (−) terminal cable from the battery,
and wait at least 90 seconds.
(c) Connect steering wheel pad connector.
(d) Connect negative (−) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(b) Clear malfunction code stored in memory (See page
DI−365).
(c) Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e) Using SST, connect terminals Tc and E1 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 results of above inspection, malfunctioning part can now be considered normal.
To make sure of this, use simulation method to check.

Downloaded from www.Manualslib.com manuals search engine H18112
Center Airbag
Sensor Assembly
Spiral
CableD Squib
D−
D+
(−) (+)
DI−388
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
5 Check harness between center airbag sensor assembly and spiral cable.
PREPARATION:
Using a service wire, connect D+ and D− on center airbag sen-
sor assembly side connector.
CHECK:
For the connector (on the center airbag sensor assembly side)
between the center airbag sensor assembly and spiral cable,
measure the resistance between D+ and D−.
OK:
OK:
Resistance: Below 1 Ω
NG Repair or replace harness or connector be-
tween center airbag sensor assembly and spiral
cable.
OK
6 Check spiral cable.
NG Repair or replace spiral cable.
OK
From results of above inspection, malfunctioning part can now be considered normal. To make
sure of this, use simulation method to check.

Downloaded from www.Manualslib.com manuals search engine AB0118
R13006AB0069
AB0119W02044
H01002
H01140
D Squib
Spiral
CableAirbag
Sensor
Assembly
ON
D+
DLC1 DTC 14ACC
or D−
Tc E1
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−389
1996 TOYOTA T100 (RM449U)
7 Check center airbag sensor assembly.
CHECK:
(a) Turn ignition switch to ACC or ON and wait at least 20 se-
conds.
(b) Clear malfunction code stored in memory (See page
DI−365).
(c) Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e) Using SST, connect 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 center airbag sensor assembly.
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.

Downloaded from www.Manualslib.com manuals search engine DI−390
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
DTC 15 Open in Front Airbag Sensor Circuit
CIRCUIT DESCRIPTION
The front airbag sensor detects the deceleration force in a frontal collision and is located in the front fender
on the left and right sides.
For details of the function of each component, see OPERATION on page RS−2.
DTC 15 is recorded when an open is detected in the front airbag sensor circuit.
NOTICE:
The front airbag sensor connector is equipped with an electrical connection check mechanism for
the purpose of detecting an open in the front airbag sensor (See page RS−2). This mechanism is
constructed so that when the terminals of the front airbag sensor have been connected (when the
connector housing lock is in the locked condition), the connection detection pin on the wire harness
side connects with the terminals for diagnosis use on the sensor side. If the connector is not properly
connected, the diagnosis system may detect only a malfunction code, even through the SRS is func-
tioning normally. When connecting the front airbag sensor connector, make sure it is connected
properly. If DTC 15 is displayed after the front airbag sensor connector has been connected, check
again that it is properly connected.
DTC No.DTC Detecting ConditionTrouble Area
15
Open cirxuit in +S wire harness or −S wire harness of front
airbag sensor.
Front airbag sensor malfunction.
Malfunction of electrical connection check mechanism of
front airbag sensor
Center airbag sensor assembly malfunction.
Front airbag sensor
Center airbag sensor
Wire harness
WIRING DIAGRAM
See page DI−373.
INSPECTION PROCEDURE
1 Preparaiton (See step 1 on page DI−396)
2 Check front airbag sensor circuit (Measure resistance between terminals +SR
and +SL of center airbag sensor assembly connector and body ground.) (See
step 2 on page DI−373).
NG Go to step 8.
OK
DI0XV−02

Downloaded from www.Manualslib.com manuals search engine H18109
ONAirbag Sensor Assembly
+SR
(−)−SR
(+)
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−391
1996 TOYOTA T100 (RM449U)
3 Check front airbag sensor circuit (Measure voltage between terminals +SR, +SL
of center airbag sensor assembly connector and body ground.).
PREPARATION:
(a) Connect negative (−) terminal cable to the battery, and
wait at least 2 seconds.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminals +SR and body ground,
+SL and body ground of harness side connector of center air-
bag sensor assembly.
OK:
Voltage: 0 V
NG Repair or replace wire harness.
OK

Downloaded from www.Manualslib.com manuals search engine AB0118AB0119S08098H00316
H00350
H00340
Center Airbag
Sensor Assembly
D Squib
Spiral
Cable
ACC ON
or
DLC1
E1
Tc
Code 15
DI−392
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
4 Check center airbag sensor assembly.
PREPARATION:
(a) Connect center airbag assembly connector.
(b) Connect negative (−) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(b) Clear malfunction code stored in memory (See page
DI−365).
(c) Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e) Using SST, connect terminals Tc and E1 of DLC1.
SST 09843−18020
(f) Check DTC.
OK:
DTC 15 is not output.
HINT:
Codes other than code 15 may be output at this time, but they
are not relevant to this check.
NG Replace center airbag sensor assembly.
OK
From results of above inspection, malfunction part can now be considered normal.
To make sure of this, use simulation method to check.
5 Check connection of center airbag sensor assembly connector.
NG Repair.
OK