1996 TOYOTA T100 check engine

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Code 11 and 31
ON
OFF
0.5 2.54.0
1.5 0.5
Code 11Code 31Repeat
S07739
DI−366
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
If there are 2 or more codes, there will be a 2.5 second pause
between each codes. After al the codes have been output,
there will be a 4.0 second pause and they will all be repeated.
HINT:
In the event of a number of trouble codes, indication will
start from the smallest numbered code.
If it does not output a DTC or outputs a DTC without termi-
nal connection, proceed to the Tc terminal circuit inspec-
tion on page DI−403.
3. DTC CHECK (Using TOYOTA hand−held tester)
(a) Hook up the TOYOTA hand−held tester to the DLC1.
(b) Read the DTCs by following the prompts on the tester
screen.
HINT:
Please refer to the TOYOTA hand−held tester operator’s manu-
al, for further details.
4. DTC CLEARANCE (Using diagnosis check wire)
(a) Conncect the 2 service wires to terminals Tc nad AB of
DLC1.
(b) Turn the ignition switch to ACC or ON and wait approx.
6 seconds.
(c) Starting with the Tc terminal, apply body ground alternate-
ly to terminal Tc and terminal AB twice each in cycles of
1.0 seconds. Confirm that body ground is absolute.
Finally, keep applying body ground to terminal Tc.
HINT:
When alternately groundling terminals Tc and AB, release
grounf from one terminal and immediately apply it to the other
terminal within an interval of 0.2 second. If DTCs do not clear,
repeat the above procedure until the codes are cleared.

Downloaded from www.Manualslib.com manuals search engine DI0XK−02
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−369
1996 TOYOTA T100 (RM449U)
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit listed for that code in the table
below (Proceed to the page given for that circuit.).
DTC No.
(See Page)Detection ItemTrouble AreaSRS
Warning Light
Normal
(DI−396)System normal−OFF
Source voltage dropBattery
Center airbag sensor assemblyON
11
(DI−373)
Short in squib circuit or front airbag
sensor circuit (to ground)Steering wheel pad (D squib)
Front airbag sensor
Spiral cable
Center airbag sensor assembly
Wire harness
ON
12
(DI−379)
Short in squib circuit or front airbag
sensor circuit (to B+)Steering wheel pad (D squib)
Front airbag sensor
Spiral cable
Center airbag sensor assembly
Wire harness
ON
14
(DI−385)
Open in D squib circuitSteering wheel pad (D squib)
Spiral cable
Center airbag sensor assembly
Wire harness
ON
15
(DI−390)Open in front airbag sensor circuitFront airbag sensor
Center airbag sensor assembly
Wire harness
ON
31
(DI−394)
Center airbag sensor assembly
malfunctionCenter airbag sensor assembly
ON
HINT:
When the SRS warning light remains lit up and the DTC 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, approx. 10 seconds the SRS warning light will automatically go out.
When 2 or more codes are indicated, the lowest numbered code will apper first.
If a code not listed on the chart is displayed, the center airbag sensor assembly is faulty.

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W02759
43 21
10 9 8 7 56 B A
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−371
1996 TOYOTA T100 (RM449U)
TERMINALS OF ECU
No.SymbolTerminal Name
A−Electrical Connection Check Mechanism
B−Electrical Connection Check Mechanism
1LASRS Warning Light
2D−Squib  (Driver)
3D+Squib  (Driver)
4TCDiagnosis
5E2Ground
6E1Ground
7+SRFront Airbag Sensor RH 
8+SLFront Airbag Sensor LH 
9IG2Power Source (IGN Fuse)
10ACCPower Source (CIG Fuse)

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DI−372
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
PROBLEM SYMPTOMS TABLE
Proceed with troubleshooting of each circuit in the table below.
SymptomSuspect AreaSee page
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.
SRS warning light circuit
(Always lit up when ignition switch is in LOCK position.)DI−398
With the ignition switch at ACC or ON, the SRS warning lights
does not light up.SRS warning light circuit
(Does not light up when ignition switch is turned to ACC
or ON.)
DI−400
DTC not displayed.
SRS warning light is always lit up a DTC check procedure.
DTC displayed without Tc and E1 terminal connection.
Tc terminal circuitDI−403

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Center Airbag
Sensor Assembly
Spiral
CableD Squib
(−) (+)D+
H18108
Center Airbag
Sensor Assembly
(−)(+)
+SL
+SR
DI−374
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Preparation. (See step 1 on page DI−396)
2 Check D squib circuit.
CHECK:
For connector on spiral cable side between spiral cable and
steering wheel pad, measure resistance between D+ and body
ground.
OK:
Resistance: 1MΩ or higher
NG Go to step 6.
OK
3 Check front airbag sensor circuit. (Measure resistance between terminals +SR,
+SL of center airbag sensor assembly connector.)
CHECK:
Measure resistance between terminals +SR, +SL of harness
side connector of center airbag sensor assembly and body
ground.
OK:
Resistance: 755 − 855 Ω
NG Go to step 7.
OK

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Spiral
Cable
ACC ON
D−D+
or
DLC1
E1
Tc
Code 11
Center Airbag
Sensor Assembly
D Squib
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−375
1996 TOYOTA T100 (RM449U)
4 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 11 is not output.
HINT:
Codes other than code 11 may be output at this time, but they
are not relevant to this check.
NG Replace center airbag sensor assembly.
OK

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H00352
H00325
Center Airbag
Sensor Assembly
Spiral
CableD Squib
ACC ON
or
DLC1
E1
Tc
Code 11
DI−376
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
5 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 11 is not output.
HINT:
Codes other than code 11 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. If malfunctioning part can not be detected
by imulation method, replace all SRS components including wire harness.

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Center Airbag
Sensor Assembly
Spiral
CableD Squib
D+
(−) (+)
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−377
1996 TOYOTA T100 (RM449U)
6 Check spiral cable.
PREPARATION:
Disconnect connector between center airbag sensor assembly
and spiral cable.
CHECK:
For connector on spiral cable side between spiral cable and
steering wheel pad, measure resistance between D+ and body
ground.
OK:
Resistance: 1MΩ or higher
NG Repair or replace spiral cable.
OK
Repair or replace harness or connector
between center airbag sensor assembly and
spiral cable.