1996 TOYOTA T100 warning lights

Downloaded from www.Manualslib.com manuals search engine − BODY ELECTRICALBODY ELECTRICAL SYSTEM
BE−7
1996 TOYOTA T100 (RM449U) A/T Oil temperature warning indicator light does not light up
1. Bulb
2. Combination Meter Wiring Circuit
3. A/T Oil Temperature Sensor
4. Wire Harness−
BE−36
BE−38
−
SRS warning light does not light up
1. Bulb
2. Combination Meter Wiring Circuit
3. Center Airbag Sensor Assembly
4. Wire Harness−
BE−36
DI−372
−
Malfunction indicator does not light up
1. Bulb
2. ECM
3. Wire Harness−
−
−
−
Seat belt warning light does not light up
1. Bulb
2. Integration Relay
3. Wiring Harness−
−
−
Discharge warning light does not light up
1. IGN Fuse (Junction Block No.1)
2. Bulb
3. Wire Harness
4. Generator−
−
−
−
Brake warning light does not light up
1. Bulb
2. Combination Meter Wiring Circuit
3. Parking Brake Switch
4. Brake Fluid Level Warning Switch−
BE−36
BE−38
BE−38
COMBINATION METER
Indicator Lights:
SymptomSuspect AreaSee page
O/D OFF indicator light does not light up
1. Bulb
2. Combination Meter Wiring Circuit
3. O/D OFF Switch
4. Wire Harness−
BE−36
DI−311
−
High beam indicator light does not light up
1. Bulb
2. Combination Meter Wiring Circuit
3. Wire Harness
4. Headlight System−
BE−36
−
BE−2
Turn indicator light does not light up
1. Bulb
2. Combination Meter Wiring Circuit
3. Wire Harness
4. Turn Signal and Hazard Warning System−
BE−36
−
BE−2
Shift indicator lights do not light up (ALL)
1. Bulb
2. Combination Meter Wiring Circuit
3. PNP Switch
4. Wire Harness−
BE−36
DI−306
−
Shift indicator lights do not light up (L, 2, D)
1. Bulb
2. Combination Meter Wiring Circuit
3. PNP Switch
4. Light Control Rheostat
5. Wire Harness−
BE−36
DI−306
BE−38
−
Only one shift indicator does not light up1. Bulb
2. Combination Meter Wiring Circuit−
BE−36

Downloaded from www.Manualslib.com manuals search engine BE034−10
Z09275
HEAD
TAIL
Flash OFF
N06515
1 23
Turn Signal Light Bulbs (21 W)
Z09278
− BODY ELECTRICALTURN SIGNAL AND HAZARD WARNING SYSTEM
BE−23
1996 TOYOTA T100 (RM449U)
INSPECTION
1. INSPECT TURN SIGNAL SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
Left turn3 − 9Continuity
Neutral−No continuity
Right turn3 − 8Continuity
If continuity is not as specified, replace the switch.
2. INSPECT TURN SIGNAL FLASHER OPERATION
(a) Connect the positive (+) lead from the battery to terminal
3 and the negative (−) lead to terminal 1.
(b) Connect the 2 turn signal light bulbs in parallel to each
other to terminals 1 and 2, check that the bulbs flash.
HINT:
The turn signal lights should flash 60 to 120 times per minute.
If one of the front or rear turn signal lights has an open circuit,
the number of flashes will be more than 140 per minute.
If operation is not as specified, replace the flasher.
3. INSPECT HAZARD WARNING SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
Switch OFF7 − 10Continuity
Switch ON4 − 5 − 6 − 9
7 − 8Continuity
Illumination circuit2 − 3Continuity
If continuity is not as specified, replace the switch.

Downloaded from www.Manualslib.com manuals search engine Z09690
w/ Tachometer
w/o TachometerAB
C
A
B
C
N06021
N06027
F
1/2
E
BE3238
Warning Light
(Wire Harness Side) Ignition
Switch
Battery BE−40
− BODY ELECTRICALCOMBINATION METER
1996 TOYOTA T100 (RM449U)
6. INSPECT FUEL RECEIVER GAUGE RESISTANCE
Measure the resistance between terminals.
w/ Tachometer:
Between terminalsResistance (Ω)
A − BApprox. 137.0
A − CApprox. 123.0
B − CApprox. 260.0
w/o Tachometer:
Between terminalsResistance (Ω)
A − BApprox. 150.0
A − CApprox. 80.0
B − CApprox. 55.0
If resistance value is not as specified, replace the receiver
gauge.
7. INSPECT FUEL SENDER GAUGE OPERATION
(a) Connect a series of three 1.5 V dry batteries.
(b) Connect the positive (+) lead from the dry cell batteries to
terminal 2 through a 3.4 W test bulb and the negative (−)
lead to terminal 1.
(c) Check the positive (+) lead from the voltmeter to terminal
2 and the negative (−) lead to terminal 1.
(d) Check that the voltage rises as the float is moved from the
top to bottom position.
If operation is not as specified, replace the sender gauge.
8. INSPECT FUEL SENDER GAUGE RESISTANCE
Measure the resistance between terminals 1 and 2.
Float position (mm)Resistance (Ω)
F : Approx. 95.0F : Approx. 3.0
1 / 2 : Approx. 188.01 / 2 : Approx. 32.5
E : Approx. 283.0E : Approx. 110.0
If resistance value is not as specified, replace the sender
gauge.
9. INSPECT FUEL LEVEL WARNING LIGHT
(a) Disconnect the connector from the sender gauge.
(b) Connect terminals 1 and 4 on the wire harness side con-
nector.
(c) Turn the ignition switch ON, check that the warning light
lights up.
If the warning light does no light up, test the bulb.

Downloaded from www.Manualslib.com manuals search engine N12609
N12610
N06616
Engine Coolant Temperature Gauge
Ignition
Switch
BatterySender
Gauge
N06617
Engine Coolant Temperature Gauge
Test
Bulb
(3.4 W)
− BODY ELECTRICALCOMBINATION METER
BE−41
1996 TOYOTA T100 (RM449U)
10. INSPECT FUEL LEVEL WARNING SWITCH
(a) Apply battery positive voltage between terminal 1 and 3,
and through a 3.4 W test bulb, check the bulb lights up.
HINT:
It will take a short time for bulb to light up.
(b) Submerge the switch in fuel, check that the bulb goes out.
If operation is not as specified, replace the sender gauge.
11. INSPECT ENGINE COOLANT TEMPERATURE RE-
CEIVER GAUGE OPERATION
(a) Disconnect the connector from the sender gauge.
(b) Turn the ignition switch ON, check that the receiver gauge
needle indicates COOL.
(c) Ground terminal on the wire harness side connecter
through a 3.4 W test bulb.
(d) Turn the ignition switch ON, check that the bulb lights up
and the receiver gauge needle moves to the hot side.
If operation is as specified, replace the sender gauge. Then, re-
check the system.
If operation is not as specified, measure the receiver gauge re-
sistance.

Downloaded from www.Manualslib.com manuals search engine Z09691
w/ Tachometer
w/o TachometerB
A
C
B A
N02651
Warning Light
Ignition
Switch
Battery
BE0146
BE1222
Oil Pressure Gauge
Ignition
Switch
BatterySender
Gauge BE−42
− BODY ELECTRICALCOMBINATION METER
1996 TOYOTA T100 (RM449U)
12. INSPECT ENGINE COOLANT TEMPERATURE RE-
CEIVER GAUGE RESISTANCE
Measure the resistance between terminals.
w/ Tachometer:
Between terminalsResistance (Ω)
A − BApprox. 150.0
A − CApprox. 54.0
B − CApprox. 138.0
w/o Tachometer:
Between terminalsResistance (Ω)
A − BApprox. 25.0
HINT:
Connect the test leads so that the current from the ohmmeter
can flow according to the above order. This circuit includes the
diode.
If resistance value is not as specified, replace the receiver
gauge.
13. INSPECT OIL PRESSURE WARNING LIGHT
(a) Disconnect the connector from the warning switch and
ground terminal on the wire harness side connector.
(b) Turn the ignition switch ON, check that the warning light
lights up.
If the warning light does not light up, test the bulb.
14. INSPECT OIL PRESSURE SENDER GAUGE
(a) Disconnect the connector from the sender gauge.
(b) Check that there is continuity between terminal and
ground with the engine stopped.
(c) Check that there is no continuity between terminal and
ground with the engine running.
HINT:
Oil pressure should be over 49 kPa (0.5 kgf/cm
2, 7.1 psi).
If operation is not as specified, replace the sender gauge.
15. INSPECT RECEIVER OIL PRESSURE GAUGE OP-
ERATION
(a) Disconnect the connector from the sender gauge.
(b) Turn the ignition switch ON, check that the receiver gauge
needle indicates LOW.

Downloaded from www.Manualslib.com manuals search engine N06234
Oil Pressure Gauge
Ignition
Switch
BatteryTest Bulb
(3.4W)
Z09833
w/ TachometerAB
BE4917
Test LED
Battery
BE1217
Ignition
Switch
BatteryWarning Light
BE2570
ONOFF
− BODY ELECTRICALCOMBINATION METER
BE−43
1996 TOYOTA T100 (RM449U)
(c) Ground terminal on the wire harness side connector
through a 3.4 W test bulb.
(d) Turn the ignition ON, check that the bulb lights up and the
receiver gauge needle moves to the high side.
If resistance value is not as specified, replace the receiver
gauge.
16. INSPECT OIL PRESSURE RECEIVER GAUGE RESIS-
TANCE
Measure the resistance between terminals A and B.
Resistance: Approx. 25.0 Ω
If resistance value is not as specified, replace the receiver
gauge.
17. INSPECT OIL PRESSURE SENDER GAUGE OPERA-
TION
(a) Disconnect the connector from the sender gauge.
(b) Apply battery positive voltage to the sender gauge termi-
nal through a test LED.
(c) Check that the bulb does not light when the engine is
stopped.
(d) Check that the LED flashes when the engine is running.
The number of flashes should vary with the engine speed.
If operation is not as specified, replace the sender gauge.
18. INSPECT BRAKE WARNING LIGHT
(a) Disconnect the connectors from the level warning switch
and parking brake switch.
(b) Connect terminals on the wire harness side connector of
the level warning switch connector.
(c) Turn the ignition switch ON, check that the warning light
lights up.
If the warning light does not light up, test the bulb.
19. INSPECT BRAKE FLUID LEVEL WARNING SWITCH
(a) Check that there is no continuity between terminals with
the switch OFF (float up).
(b) Check that there is continuity between terminals with the
switch ON (float down).
If operation is not as specified, replace the switch.

Downloaded from www.Manualslib.com manuals search engine N06136
ON
OFF
BE1217
Warning Light
Ignition
Switch
Battery
N07797
ONOFF
N13155
Warning Light
Ignition
Switch
Battery
N06137
ON
OFF BE−44
− BODY ELECTRICALCOMBINATION METER
1996 TOYOTA T100 (RM449U)
20. INSPECT PARKING BRAKE SWITCH
(a) Check that there is continuity between terminals with the
switch ON (switch pin released).
(b) Check that there is no continuity between terminals with
the switch OFF (switch pin pushed in).
If operation is not as specified, replace the switch.
21. INSPECT WASHER LEVEL WARNING LIGHT
(a) Disconnect the connectors from the level warning switch
and parking brake switch.
(b) Connect terminals on the wire harness side connector of
the level warning switch connector.
(c) Remove the CHARGE fuse and turn the ignition switch
ON, check that the warning light come on.
If the warning light does not light up, test the bulb.
22. INSPECT WASHER LEVEL SWITCH
(a) Check that there is no continuity between terminals with
the switch OFF (float up).
(b) Check that there is continuity between terminals with the
switch ON (float down).
If operation is not as specified, replace the switch.
23. INSPECT SEAT BELT WARNING LIGHT
(a) Remove the integration relay from the junction block
No.1.
(b) Ground terminal 9 on the junction block side connector.
(c) Turn the ignition switch ON, check that the warning light
lights up.
If the warning light does not light up, inspect the bulb or wire har-
ness.
24. INSPECT BUCKLE SWITCH CONTINUITY
(a) Check that there is continuity between terminals on the
switch side connector with the switch ON (belt unfas-
tened).
(b) Check that there is no continuity between terminals on the
switch side connector with the switch OFF (belt fastened).
If operation is not as specified, replace the seat belt inner.