1996 TOYOTA T100 check engine

Downloaded from www.Manualslib.com manuals search engine AB0034
+A
+S
−S−A
DI−378
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
7 Check front airbag sensor.
PREPARATION:
Disconnect front airbag sensor connector.
CHECK:
Measure resistance between each terminal of front airbag
sensor.
OK:
TerminalResistance
+S − +ALess than 1 Ω
+S − −S1 MΩ or higher
−S − −A755 − 855 Ω
NOTICE:
Do not press ohmmeter probes too strongly against
terminals of front airbag sensor.
Make sure front airbag sensor connector is properly
connected.
NG Replace front airbag sensor.
OK
Repair or replace harness or connector
between center airbag sensor assembly and
front airbag sensor.

Downloaded from www.Manualslib.com manuals search engine H18109
Center Airbag
Sensor Assembly
(−) (+)
+SL
+SR ON
DI−380
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Preparation (See step 1 on page DI−396)
2 Check D squib circuit (Measure voltage between terminals D+ or D− of center air-
bag sensor assembly connector and body ground.).
PREPARATION:
(a) Connect negative (−) terminal cable to battery.
(b) Turn ignition switch to ON.
CHECK:
Measure voltage between terminals D+ or D− of harness side
connector of center airbag sensor assembly and body ground.
OK:
Voltage: 0 V
NG Go to step 5.
OK

Downloaded from www.Manualslib.com manuals search engine W05582AB0118AB0119AB0069S08098W02043H00329
Center Airbag
Sensor Assembly
Spiral
Cable
ACC ON
D−D+
or
DLC1
E1Code 12
TcD Squib
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−381
1996 TOYOTA T100 (RM449U)
3 Check center airbag sensor assembly.
PREPARATION:
(a) Turn ignition switch LOCK.
(b) Disconnect negative (−) terminal cable from battery.
(c) Connect connector to center airbag sensor assembly.
(d) Using a service wire, connect D+ and D− on spiral cable
side of connector between spiral cable and steering
wheel pad.
(e) 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 12 is not output.
HINT:
Codes other than code 12 may be output at this time, but they
are not relevant to this check.
NG Replace center airbag sensor assembly.
OK

Downloaded from www.Manualslib.com manuals search engine AB0118 AB0119
S08098W02043
H00352
H00330
Center Airbag
Sensor Assembly
Spiral
CableD Squib
ACC ON
or
DLC1
E1
Tc
Code 12
DI−382
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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 12 is not output.
HINT:
Codes other than code 12 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 W05583AB0119R14288H00331
Center Airbag
Sensor Assembly
Spiral
CableD Squib
ON
D+
(−) (+)
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−383
1996 TOYOTA T100 (RM449U)
5 Check D squib circuit.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect connector between center airbag sensor as-
sembly and spiral cable.
(c) Turn ignition switch ON.
CHECK:
For connector on spiral cable side between spiral cable and
steering wheel pad, measure voltage between D+ and body
ground.
OK:
Voltage: 0 V
NG Repair or replace spiral cable.
OK
Repair or replace harness or connector between center airbag sensor assembly and spiral cable.

Downloaded from www.Manualslib.com manuals search engine AB0119
R14288H01000
H01133
D Squib
Spiral
CableAirbag
Sensor
Assembly
←
ON
D+
(+) (−)→
DI−384
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
6 Check spiral cable.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect connector between center airbag sensor as-
sembly and spiral cable.
(c) Turn ignition switch ON.
CHECK:
Measure voltage at D+, D− on spiral cable side of connector be-
tween spiral cable and steering wheel pad.
OK:
Voltage: 0 V
NG Repair or replace spiral cable.
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 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