1996 TOYOTA T100 check engine light

Downloaded from www.Manualslib.com manuals search engine BE036−02
N05342
N05343
BE2875
ON
OFF
1
− BODY ELECTRICALINTERIOR LIGHT SYSTEM
BE−25
1996 TOYOTA T100 (RM449U)
INSPECTION
1. INSPECT ROOM LIGHT ASSEMBLY CONTINUITY
(a) Disconnect the connector from room light assembly.
(b) Turn the room light switch ON, check that the there is con-
tinuity between terminal 2 and body ground.
(c) Turn the room light switch DOOR, check that there is con-
tinuity between terminals 1 and 2.
If operation is not as specified, replace the switch.
2. INSPECT DOOR COURTESY SWITCH CONTINUITY
(a) Check that there is no continuity between terminal and
the switch body in the ON position (switch pin released :
opened door).
(b) Check that there is continuity between terminal and the
switch body in the OFF position (switch pin pushed in :
closed door).
If operation is not as specified, replace the switch.

Downloaded from www.Manualslib.com manuals search engine Z09692
BA w/ Tachometer
N06031
BE3235
Ignition
Switch
Battery(Wire Harness Side) (3.4W) Fuel Gauge
− BODY ELECTRICALCOMBINATION METER
BE−39
1996 TOYOTA T100 (RM449U)
3. INSPECT TACHOMETER ON−VEHICLE
(a) Connect a tune−up test tachometer, and start the engine.
NOTICE:
Reversing the connection of the tachometer will damage
the transistors and diodes inside. When removing or instal-
ling the tachometer, be careful not to drop or subject it to
heavy shocks.
(b) Compare the tester and tachometer indications.
DC 13.5 V 20°C at (68°F)
Standard indication (rpm)Allowable range (rpm)
700610 − 750
3,0002,850 − 3,150
5,0004,850 − 5,150
7,0006,790 − 7,210
If error is excessive, replace the tachometer.
4. INSPECT VOLT GAUGE SYSTEM
Measure the resistance between terminals A and B.
Resistance: Approx. 347 Ω
If resistance value is not as specified, replace the gauge.
5. INSPECT FUEL RECEIVER GAUGE OPERATION
(a) Disconnect the connector from the sender gauge.
(b) Turn the ignition switch ON, check that the receiver gauge
needle indicates EMPTY.
(c) Connect terminals 1 and 3 on the wire harness side con-
nector through a 3.4 watts test bulb.
(d) Turn the ignition switch ON, check that the bulb lights up
and the receiver gauge needle moves towards the full
side.
HINT:
Because of the silicon oil in the gauge, it will take a short time
for needle to stabilize.
If operation is not as specified, inspect the receiver gauge resis-
tance.

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.

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.