Downloaded from www.Manualslib.com manuals search engine RS03H−01
− SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS−1
1768 Author: Date:
1996 TOYOTA T100 (RM449U)
SRS AIRBAG
PRECAUTION
NOTICE:
The TOYOTA T100 is equipped with SRS, which comprises a driver airbag. Failure to carry out
service operations in the correct sequence could cause the SRS to unexpectedly deploy during
servicing, possibly leading to a serious accident. Further, if a mistake is made in servicing the
SRS, it is possible that the SRS may fail to operate when required. Before performing servicing
(including removal or installation of parts, inspection or replacement), be sure to read the fol-
lowing items carefully, then follow the correct procedures described in the repair manual.
Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most impor-
tant source of information when troubleshooting. When troubleshooting the SRS, always in-
spect the DTCs before disconnecting the battery.
Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, air-
bag sensor assembly and front airbag sensor should be inspected (See page RS−9, RS−23 and
RS−28).
Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.
Never disassemble and repair the steering wheel pad, airbag sensor assembly or front airbag
sensor in order to reuse it.
If the steering wheel pad, airbag sensor assembly or front airbag sensor has been dropped, or
if there are cracks, dents or other defects in the case, bracket or connector, replace them with
new ones.
Use a volt/ohmmeter with high impedance ( 10 kΩ/V minimum) for troubleshooting the system’s
electrical circuits.
Information labels are attached to the periphery of the SRS components. Follow the instruc-
tions on the notices.
After work on the SRS is completed, perform the SRS warning light check or SRS side airbag
warning light check (See page DI−365).
If the vehicle is equipped with a mobile communication system, refer to the precaution in the
IN section.
CAUTION:
Work must be started after 90 seconds from when the ignition switch is turned to the ”LOCK”
position and the negative (−) terminal cable is disconnected from the battery.
(The SRS is equipped with a back−up power source so that if work is started within 90 seconds
from disconnecting the negative (−) terminal cable of the battery, the SRS may be deployed.)
When the negative (−) terminal cable is disconnected from the battery, the memory of the clock
and audio system will be canceled. So before starting work, make a record of the contents mem-
orized in the audio memory system. When work is finished, reset the audio systems as they
were before and adjust the clock. To avoid erasing the memory in each memory system, never
use a back− up power supply from outside the vehicle.
Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during
repairs.
Do not expose the steering wheel pad, airbag sensor assembly or front airbag sensor directly
to hot air or flames.
Downloaded from www.Manualslib.com manuals search engine BE – BODY ELECTRICAL
BODY ELECTRICAL SYSTEM BE-1
POWER SOURCE BE-10
IGNITION SWITCH AND KEY UNLOCK
WARNING SWITCH BE-11
HEADLIGHT AND TAILLIGHT SYSTEM BE-14
TURN SIGNAL AND HAZARD
WARNING SYSTEM BE-22
INTERIOR LIGHT SYSTEM BE-24
BACK-UP LIGHT SYSTEM BE-26
STOP LIGHT SYSTEM BE-29
WIPER AND WASHER SYSTEM BE-31
COMBINATION METER BE-35
POWER WINDOW CONTROL SYSTEM BE-46
POWER DOOR LOCK CONTROL
SYSTEM BE-50
POWER MIRROR CONTROL SYSTEM BE-56
AUDIO SYSTEM BE-59
ANTENNA BE-81
CLOCK BE-83
Downloaded from www.Manualslib.com manuals search engine N12611
N12612
Z04393
4WD Indicator Light
(Wire Harness Side) Ignition
Switch
Battery
BE3241
OFF
ON
Z04394
Test Bulb
(3.4W)
Bright
Extinguished
Dark
− BODY ELECTRICALCOMBINATION METER
BE−45
1996 TOYOTA T100 (RM449U)
25. INSPECT INTEGRATION RELAY SEAT BELT WARN-
ING SYSTEM OPERATION
(a) Connect the positive (+) lead from the battery to terminals
3 and 9.
(b) Connect the terminal 8 to terminal 9 through the 3.4 W test
bulb.
(c) Connect the negative (−) lead from the battery to terminal
7.
(d) Check that the bulb lights and the buzzer sounds.
(e) Return to step (a), and operate the buzzer again.
(f) Connect the negative (−) lead from the battery to terminal
6.
(g) Check that the buzzer stops sounding.
HINT:
Check the buzzer within a period of 4 to 8 seconds.
If operation is not as specified, replace the relay.
26. INSPECT INTEGRATION RELAY CIRCUIT (See page
BE−12)
27. INSPECT 4WD INDICATOR LIGHT
(a) Disconnect the connector from the 4WD indicator switch.
Connect the switch terminal 2 and body ground.
(b) Turn the ignition switch on. Check that the bulb lights up.
If operation is not as specified, remove and test the bulb.
28. INSPECT 4WD INDICATOR SWITCH
(a) Check that the there is continuity when the switch pin is
pushed.
(b) Check that there is no continuity when the switch is free.
If operation is not as specified, replace the switch.
29. INSPECT LIGHT CONTROL RHEOSTAT
(a) Connect terminals 1 and 3 through a 3.4 W test bulb.
(b) Connect the positive (+) lead from the battery to terminal
1 and the negative (−) lead to terminal 2.
(c) Turn the rheostat knob fully counterclockwise, check that
the test bulb goes out.
(d) Gradually turn the rheostat knob clockwise, check that
the test bulb brightness changes from dark to bright.
If operation is not as specified, replace the rheostat.
Downloaded from www.Manualslib.com manuals search engine BE03N−09
I01856
Ground
Power Source
(Illumination)(Clock Side) (Wire Harness Side) E
ILL
B
ACCPower Source
(System Operation)
Power Source
(Display Operation)
2
3
4Connector
1 CLOCK WILL NOT OPERATE
I01857
(Clock Side)
(Wire Harness Side)
B + GND
e−4−2−De−4−1−D
Ye s
Ye sNo
No
Is there battery positive voltage between terminal +B and body
ground.
Is there battery positive voltage between terminal GND and body
ground.
Replace clock.Open or short circuit in wire harness between terminal
+B and DOME fuse.
Open circuit in wire harness between terminal
GND and body ground.
− BODY ELECTRICALCLOCK
BE−83
1883 Author: Date:
1996 TOYOTA T100 (RM449U)
CLOCK
TROUBLESHOOTING
HINT:
Troubleshoot the clock according to the table below.
ProblemNo.
Clock will not operate1
Clock loses or gains time2
± 1.5 seconds / day
1. PROBLEM NO.1
(a) Check that the battery positive voltage is 10 − 16 V.
If voltage is not as specified, replace the battery.
(b) Check that the DOME fuse is not blown.
If the fuse is blown, replace the fuse and check for short.
(c) Troubleshoot the clock as follows.
HINT:
Inspect the connector on the wire harness side.
Downloaded from www.Manualslib.com manuals search engine 2 CLOCK LOSES OR GAINS TIME
I01858
(Clock Side)
(Wire Harness Side)
B + GND
e−4−2−D
e−4−1−D
Ye s
Is there battery positive voltage between terminal +B and
body ground.
Adjust or replace clock.Bellow 10 V
Locate cause and repair, or rechange battery.
BE−84
− BODY ELECTRICALCLOCK
1884 Author: Date:
1996 TOYOTA T100 (RM449U)
2. PROBLEM NO.2
(a) Check that the battery positive voltage is 10 − 16 V.
If voltage is not as specified, replace the battery.
(b) Inspect the error of the clock.
Allowable error (per day): ± 1.5 seconds
If the error exceeds the allowable error, replace the clock.
(c) Check that the clock adjusting button is sticking in posi-
tion and has failed to return.
If the error exceeds the allowable error, replace the clock.
(d) Troubleshoot the clock as follows.
HINT:
Inspect the connector on the wire harness side.
