1996 TOYOTA T100 engine

Downloaded from www.Manualslib.com manuals search engine H18116
Airbag Sensor Assembly
LA
(−)
(+)ON
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−401
1996 TOYOTA T100 (RM449U)
3 Preparation. (See step 1 on page DI−396)
4 Check SRS warning light circuit.
PREPARATION:
(a) Connect negative (−) terminal cable to battery.
(b) Turn ignition switch to ACC or ON.
CHECK:
Measure voltage LA terminal of harness side connector of cen-
ter airbag sensor assembly and body ground.
OK:
Voltage: 10 − 16 V
NG Check SRS warning light bulb/repair SRS
warning light circuit.
OK

Downloaded from www.Manualslib.com manuals search engine AB0118AB0119W05587W05586
H00350
H00346
Center Airbag
Sensor Assembly
Spiral
CableD Squib
ACC ON
w/o Tachometer w/ Tachometeror
DI−402
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
5 Does SRS warning light come on?
PREPARATION:
(a) Disconnect negative (−) terminal cable from the battery.
(b) Connect center airbag sensor assembly connector.
(c) Connect negative (−) terminal cable to battery, and wait
at least 2 seconds.
(d) Turn ignition switch to ACC or ON.
CHECK:
Check operation of SRS warning light.
OK:
SRS warning light comes on.
NO Check terminal LA of center airbag sensor
assembly. If normal, replace center airbag
sensor assembly.
YES
From results of above inspection, malfunctioning part can now be considered normal. To make
sure of this, use simulation method to check.
6 Is new ECU−B fuse burnt out again?
NO Using simulation method, reproduce
malfunction symptoms. (See page IN−16)
YES
Check harness between ECU−B fuse and
SRS warning light.

Downloaded from www.Manualslib.com manuals search engine R15206
DLC1Tc IE111
Y−B6
EB
BR
E1
Y−BY−B 11
Short Connector8
Tc Center Airbag
Sensor Assembly
3
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−403
1996 TOYOTA T100 (RM449U)
Tc Terminal Circuit
CIRCUIT DESCRIPTION
By connecting terminal Tc and E1 of the DLC1, the airbag sensor assembly is set in the DTC output mode.
The DTCs are displayed by the blinking of the SRS warning light.
WIRING DIAGRAM
DI0Y1−02

Downloaded from www.Manualslib.com manuals search engine AB0118AB0119W05587W05586AB0117H00347
ACC ON
or LOCK
w/o Tachometer
w/ Tachometer
AB0118
R14305AB0119
H00030
ACCON
or
E1
Tc
(+) (−)
DI−404
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
If DTC is not displayed, do following troubleshooting:
1 Does SRS warning light up for approx. 6 seconds?
PREPARATION:
Check operation of SRS warning light after ignition switch is
turned from LOCK position to ACC or ON position.
NO Check SRS warning light system (See page
DI−365).
YES
2 Check voltage between terminals Tc and E1 of DLC1.
PREPARATION:
Turn ignition switch to ACC or ON.
CHECK:
Measure voltage between terminals Tc and E1 of DLC1.
OK:
Voltage: 10 − 16 V
OK Go to step 4.
NG

Downloaded from www.Manualslib.com manuals search engine AB0118
R14304AB0119
H00031
ACCON
orTc
(+)
(−)
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−405
1996 TOYOTA T100 (RM449U)
3 Check voltage between terminals Tc of DLC1 and body ground.
CHECK:
Measure voltage between terminal Tc of DLC1 and body
ground.
OK:
Voltage: 10 − 16 V
OK Check harness between terminal E1 of DLC1
and body ground.
NG

Downloaded from www.Manualslib.com manuals search engine H18117
LOCK Airbag Sensor Assembly
Tc
(+) (−)
DI−406
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
4 Check center airbag sensor assembly.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (−) terminal cable from the battery,
and wait at least 90 seconds.
(c) Remove steering wheel pad (See page SR−13 or
SR−26).
(d) Disconnect center airbag sensor assembly connector.
(e) Insert service wire into terminal Tc from back side as
shown.
(f) Connect center airbag sensor assembly connector with
service wire.
(g) Connect negative (−) terminal cable to battery.
(h) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(i) Connect service wire of terminal Tc to body ground.
CHECK:
Check operation of SRS warning light.
OK:
SRS waning light comes on.
NOTICE:
Never make a mistake with the terminal connection posi-
tion as this cause a malfunction.
OK Check harness between center airbag sensor
assembly and DLC1.
NG
Replace center airbag sensor assembly.

Downloaded from www.Manualslib.com manuals search engine R14303
Airbag Sensor Assembly
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI−407
1996 TOYOTA T100 (RM449U)
If DTC is displayed without DTC check procedure, perform following trouble-
shooting:
1 Check resistance between terminal Tc of center airbag sensor assembly and
body ground.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (−) terminal cable from the battery,
and wait at least 90 seconds.
(c) Disconnect center airbag sensor assembly connector.
CHECK:
Check resistance between terminal Tc of center airbag sensor
assembly connector and body ground.
OK:
Resistance: 1MΩ or Higher
NG Repair or replace harness or connector.
OK
Replace center airbag sensor assembly.

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Customer Problem Analysis
Check and Clear DTC (Precheck)
Vehicle Brought to Workshop
Problem Symptom ConfirmationSymptom Simulation Symptom does not occur
DTC CheckNormal code
DTC Chart
Problem Symptom Table
Circuit InspectionInput Signal Check
Parts Inspection
Identification of Problem
Repair
Confirmation Test
EndItems inside
are titles of pages in this
manual with the page number indicated in the
bottom portion. See the indicated pages
for detailed explanations. 1
2
34
5
6
7
89
10Step 2, 5, 8, 10: Diagnostic steps permitting the use of the
TOYOTA hand−held tester or TOYOTA
break−out−box. P. DI−409
P. DI−410
P. DI−410
P. DI−415
P. IN−16
P. DI−419
P. DI−420 − DI−458
OKNG
Symptom occurs
Malfunction code DI−408
− DIAGNOSTICSCRUISE CONTROL SYSTEM
665 Author: Date:
1996 TOYOTA T100 (RM449U)
CRUISE CONTROL SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING