1996 TOYOTA T100 warning light

Downloaded from www.Manualslib.com manuals search engine BE−4
− BODY ELECTRICALBODY ELECTRICAL SYSTEM
1996 TOYOTA T100 (RM449U) Headlight does not go out with light control SW in OFF.
1. Headlight Control Relay
2. Light Control Switch
3. Wire HarnessBE−17
BE−17
−
Taillight does not light up with light control SW in TAIL.
1. Taillight Control Relay
2. Light Control Switch
3. Wire HarnessBE−17
BE−17
−
Taillight does not go out with light control SW in OFF.
1. Taillight Control Relay
2. Light Control Switch
3. Wire HarnessBE−17
BE−17
−
Headlight do not light up with engine running, parking brake SW
and light control SW in OFF.
1. ECU−B Fuse (Junction Block No.1)
2. GAUGE Fuse (Junction Block No.1)
3. DRL Fuse (Junction Block No.1)
4. D.R.L. Relay
5. D.R.L. No.4 Relay
6. D.R.L. Resistor
7. Wire Harness
8. Generator L Terminal
9. Parking Brake SwitchBE−14
BE−14
BE−14
BE−17
BE−17
BE−17
−
−
BE−38
”Light−on warning system” does not operate.
1. Integration Relay
2. DOME Fuse (Relay Block)
3. GAUGE Fuse (Junction Block No.1)
4. Door Courtesy Switch
5. Wire HarnessBE−17
BE−14
BE−14
BE−25
−
TURN SIGNAL AND HAZARD WARNING SYSTEM
SymptomSuspect AreaSee page
”Hazard” and ”Turn” do not light up
1. Hazard Warning Switch
2. Turn Signal Flasher
3. Wire HarnessBE−23
BE−23
−
The flashing frequency is abnormal
1. Bulb
2. Turn Signal Switch
3. Wire Harness−
BE−23
−
Hazard warning light does not light up
(Turn signal is normal)1. HAZ−HORN Fuse (Relay Block)
2. Wire HarnessBE−22
−
Hazard warning light does not light up in one direction1. Hazard Warning Switch
2. Wire HarnessBE−23
−
*1 Turn signal does not light up
1. Ignition Switch
2. TURN Fuse (Junction Block No.1)
3. Turn Signal Switch
4. Wire HarnessBE−12
BE−22
BE−23
−
*2 Turn signal does not light up
1. TURN Fuse (Junction Block No.1)
2. Turn Signal Switch
3. Wire HarnessBE−22
BE−23
−
Turn signal does not light up in one direction1. Turn Signal Switch
2. Wire HarnessBE−23
−
Only one bulb does not light up1. Bulb
2. Wire Harness−
−
*1: Combination Meter, Wiper and Washer do not operate.
*
2: Combination Meter, Wiper and Washer are normal.

Downloaded from www.Manualslib.com manuals search engine BE−6
− BODY ELECTRICALBODY ELECTRICAL SYSTEM
1996 TOYOTA T100 (RM449U)
COMBINATION METER
Meter, Gauge and Illumination:
SymptomSuspect AreaSee page
Tachometer, fuel gauge oil Pressure and water temperature
gauge do not operate
1. GAUGE Fuse (Junction Block No.1)
2. Combination Meter Wiring Circuit
3. Wire Harness
4. Meter Circuit Plate−
BE−36
−
BE−36
Speedometer does not operate1. Vehicle Speed Sensor
2. Speedometer Driven Gear and Drive GearBE−38
−
Tachometer does not operate
1. Combination Meter Wiring Circuit
2. Wire Harness
3. Igniter
4. Meter Circuit PlateBE−36
−
−
−
BE−36
Fuel gauge does not operate or abnormal operation
1. Fuel Receiver Gauge
2. Fuel Sender Gauge
3. Combination Meter Wiring Circuit
4. Wire HarnessBE−38
BE−38
BE−36
−
Engine coolant temperature gauge does not operate
or abnormal operation
1. Engine Coolant Temperature Receiver Gauge
2. Engine Coolant Temperature Sender Gauge
3. Combination Meter Wiring Circuit
4. Wire HarnessBE−38
BE−38
BE−36
−
Oil pressure gauge does not operte or abnormal operation
1. Oil Pressure Receiver Gauge
2. Oil Pressure Sender Gauge
3. Combination Meter Wiring Circuit
4. Wire HarnessBE−38
BE−38
BE−36
−
All illumination lights do not light up
1. TAIL Fuse (Junction Block No.1)
2. Light Control Rheostat
3. Wire Harness−
BE−38
−
Brightness does not change even when rheostat turned1. Bulb
2. Wire Harness−
−
Only one illumination light does not light up1. Bulb
2. Wire Harness−
−
COMBINATION METER
Warning Lights:
SymptomSuspect AreaSee page
Warning light do not light up (Except Discharge)
1. GAUGE Fuse (Junction Block No.1)
2. Combination Meter Wiring Circuit
3. Wire Harness−
BE−36
−
Oil pressure warning light does not light up
1. Bulb
2. Combination Meter Wiring Circuit
3. Oil Pressure Warning Switch
4. Wire Harness−
BE−36
BE−38
−
Washer Fluid Level Warning light does not light up
1. Bulb
2. Combination Meter Wiring Circuit
3. Washer Fluid Level Warning Switch
4. Wire Harness−
BE−36
BE−38
−
Fuel level warning light does not light up
1. Bulb
2. Combination Meter Wiring Circuit
3. Fuel Level Warning Switch
4. Wire Harness−
BE−36
BE−38
−

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 N12607
N12608
Junction Block Side
− BODY ELECTRICALIGNITION SWITCH AND KEY UNLOCK WARNING
SWITCHBE−13
1996 TOYOTA T100 (RM449U)
(f) Connect the positive (+) lead from the battery to terminal
3.
(g) Disconnect the negative (−) lead from the battery to termi-
nal 10.
(h) Check that the buzzer stops sounding.
If operation is not as specified, replace the relay.
4. INSPECT INTEGRATION RELAY CIRCUIT
Remove the relay from the junction block No.1 and inspect the
connectors on the junction block side.
Tester connectionConditionSpecified condition
2 − GroundKey unlock warning switch OFFNo continuity
2 − GroundKey unlock warning switch ONContinuity
*4 − GroundConstantContinuity
6 − GroundBuckle switch OFFNo continuity
6 − GroundBuckle switch ONContinuity
7 − GroundConstantContinuity
10 − GroundDriver’s door courtesy switch OFFNo continuity
10 − GroundDriver’s door courtesy switch ONContinuity
12 − GroundPassenger’s door courtesy switch OFFNo continuity
12 − GroundPassenger’s door courtesy switch ONContinuity
1 − GroundIgnition switch LOCKNo voltage
1 − GroundIgnition switch ACC or ONBattery positive voltage
3 − GroundConstantBattery positive voltage
5 − GroundIgnition switch LOCK or ACCNo voltage
5 − GroundIgnition switch ONBattery positive voltage
8 − GroundIgnition switch LOCK or ACCNo voltage
8 − GroundIgnition switch ONBattery positive voltage
9 − GroundIgnition switch LOCK or ACCNo voltage
9 − GroundIgnition switch ONBattery positive voltage
11 − GroundLight control switch OFFNo voltage
11 − GroundLight control switch TAIL or HEADBattery positive voltage
*: SR5 Model
If circuit is as specified, trying replacing the relay with a new
one.
If circuit is not as specified, inspect the circuits connected to oth-
er parts.

Downloaded from www.Manualslib.com manuals search engine Z08523
1 2
3
41 2
3
4
N15399
N15400
N15773
N06230
Wire Harness Side
12
34 5 867
11
91012 13
17 16 15 14
18 BE−18
− BODY ELECTRICALHEADLIGHT AND TAILLIGHT SYSTEM
1996 TOYOTA T100 (RM449U)
4. INSPECT HEADLIGHT DIMMER RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 − 4
2 − 4Continuity
Apply B+ between
terminals 2 and 4.3 − 4Continuity
If continuity is not as specified, replace the relay.
5. INSPECT DOOR COURTESY SWITCH
(See page BE−25)
6. Light−On Warning System:
INSPECT INTEGRATION RELAY OPERATION
(a) Connect the positive (+) lead from the battery to terminal
2 and 11.
(b) Connect the negative (−) lead from the battery to terminal
7 and 10.
(c) Check the buzzer sounds.
(d) Disconnect the positive (+) lead from the battery to termi-
nal 2.
(e) Check that the buzzer stops sounding.
(f) Connect the positive (+) lead from the battery to terminal
2.
(g) Disconnect the negative (−) lead from the battery to termi-
nal 10.
(h) Check that the buzzer stops sounding.
If operation is not as specified, replace the relay.
7. Connector Disconnected:
INSPECT DAYTIME RUNNING LIGHT RELAY CIRCUIT
Disconnect the connector from the relay and inspect the con-
nector on the wire harness side.

Downloaded from www.Manualslib.com manuals search engine Z16014
Relay Block
 HAZ−HORN Fuse
Front Turn Signal LightRear Combination Light
Hazard Warning Switch
Combination Switch
 Turn Signal SwitchIgnition Switch
Turn Signal Flasher
Junction Block No.1
 TURN Fuse
BE033−04
BE−22
− BODY ELECTRICALTURN SIGNAL AND HAZARD WARNING SYSTEM
1822 Author: Date:
1996 TOYOTA T100 (RM449U)
TURN SIGNAL AND HAZARD WARNING SYSTEM
LOCATION

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.