relay TOYOTA T100 1996 Factory Manual Online

Downloaded from www.Manualslib.com manuals search engine F14591
ABS Contorl
Relay
ABS
ActuatorABS ECU Motor
Relay
Solenoid
Relay Battery
A5
A5EA1
ID
W−B W
W WW
EA1
A5A5
A5 A6
A6
A6
A4ABS
Actuator
ABS ECUABS ECUIG Switch
Integration
Relay
ABS
Warning
Light I15C10
C10
A16
1A
IE1
IE1B−YB−Y
LG
B−RB−R
B−RB−R
B−O
23 22 Short Pin 10
1
2
6
5
44 1 4
32
29
9
4
8
GAUGE
12
WA
5
24 DI−354
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 TOYOTA T100 (RM449U)
ABS Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU detects trouble, it lights the ABS warning light while at the same time prohibiting ABS control. At
this time, the ECU records a DTC in memory.
After removing the short pin of the DLC1, connect terminals Tc and E
1 of the DLC1 to make the ABS warning
light blink and output the DTC.
WIRING DIAGRAM
DI10S−03

Downloaded from www.Manualslib.com manuals search engine R14139
A6A5 Continuity
ContinuityOpen
5 6 31 2
R14140
A5
A6
(−)
(+)Continuity
Open
1 2
5
6
3
R14144
A5A6
(+) (−)
4 5
DI−356
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 TOYOTA T100 (RM449U)
2 Check ABS control relay.
PREPARATION:
Disconnect the connectors from the control relay.
CHECK:
Check continuity between each terminal of ABS control relay.
OK:
Terminals A5 − 1 and A6 − 3Continuity (Reference value 80 Ω)
Terminals A5 − 5 and A5 − 6Continuity
Terminals A5 − 2 and A5 − 5Open
CHECK:
(a) Apply battery positive voltage between terminals A5 − 1
and A6 − 3.
(b) Check continuity between each terminal of ABS control
relay.
OK:
Terminals A5 − 5 and A5 − 6Open
Terminals A5 − 2 and A5 − 5Continuity
CHECK:
Connect the  test lead to terminal A5 − 4 and the  test lead
to terminal A5 − 5. Check continuity between terminals.
OK:
Continuity
If there is no continuity, connect the  test lead to terminal A5
− 4 and the  lead to terminal A5 − 5. Recheck continuity be-
tween terminals.
NG Replace ABS control relay.
OK
Check for open in harness and connector between DLC1, ABS control relay and body ground
(See page IN−26).

Downloaded from www.Manualslib.com manuals search engine − DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−357
1996 TOYOTA T100 (RM449U)
3 Is DTC output?
Check DTC on page DI−321.
YES Repair circuit indicated by code output.
NO
4 Does ABS warning light go off if short pin is removed?
NO Check for short in harness and connector be-
tween warning light, DLC1 and ECU (See page
IN−26).
YES
5 Check ABS control relay (See step 2).
NG Replace ABS control relay.
OK
Check for short in harness and connector between DLC1 and ABS control relay (See page
IN−26).

Downloaded from www.Manualslib.com manuals search engine R15204
J/B No.1
Center Airbag
Sensor Assembly Ignition
SwitchShort
Connector Integration
Relay
R/B No.2
BatteryGR−RGR−R
B−YB−YACC
IG2
R−L
B−R L−R
CIG
IGN
ALT
AM1
AM2
WW
W
W
W−R
1A
1A 1CIA3
IA3
W−R34
34
16
15
17 3 4
7 2
83 14
8 2
2
2 2 2 26
4
2 5
13 DI−396
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
DTC Normal Source Voltage Drop
CIRCUIT DESCRIPTION
The SRS is equipped with a voltage−increase circuit (DC−DC converter) in the center airbag sensor assem-
bly in case the source voltage drops.
When the battery voltage drops, the voltage−increase circuit (DC−DC converter) functions to increase the
voltage of the SRS to normal voltage.
The diagnosis system malfunction display for this circuit is different to other circuits−when the SRS warning
light remains lit up and the DTC is a normal code, source voltage drop is indicated.
Malfunction in this circuit is not recorded in the center airbag sensor assembly, and the source voltage re-
turns to normal, after approx. 10 seconds the SRS warning light automatically goes off.
DTC No.Diagnosis
(Normal)Source voltage drop
WIRING DIAGRAM
DI989−01

Downloaded from www.Manualslib.com manuals search engine R15207
Center Airbag
Sensor Assembly
Relay Block
No.2
ECU−B SRS Warning Light
Battery
Short
ConnectorY−B Y−B
P−B P−B
P−B P−B Y−B
P−B
DLC1
TC
LA Tc
ABIE1
IE2
IA3 W
WYR
ALT
7
21211 2
2 1
2
58 6
8
5 11
22 11 DI−398
− DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1996 TOYOTA T100 (RM449U)
SRS Warning Light Circuit Malfunction (Always lit up, when
ignition switch is in LOCK position.)
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the ignition switch is
turned from LOCK position to ACC or ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to inform the driver of the abnormality.
When terminals Tc and E1 of the DLC1 are connected, the DTC is displayed by the blinking of the SRS warn-
ing light.
WIRING DIAGRAM
DI98A−01

Downloaded from www.Manualslib.com manuals search engine N06038
ECU−B Fuse
I00016
BATT
(−)
(+)
− DIAGNOSTICSCRUISE CONTROL SYSTEM
DI−453
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Check ECU−B fuse.
PREPARATION:
Remove the ECU−B fuse from relay block No.1.
CHECK:
Check continuity of ECU−B fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to the ECU−B fuse.
OK
2 Check voltage between terminal BATT of cruise control ECU connector and body
ground (See page IN−16).
PREPARATION:
Remove the ECU with connector still connected.
CHECK:
Measure voltage between terminal BATT of ECU connector
and body ground.
OK:
Voltage: 10 − 16 V
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI−419).
NG
Check and repair harness and connector be-
tween battery and cruise control ECU (See
page IN−16).

Downloaded from www.Manualslib.com manuals search engine MF – MFI SYSTEM (3RZ-FE)

MFI SYSTEM MF-1
FUEL PUMP MF-5
FUEL PRESSURE REGULATOR MF-13
INJECTOR MF-16
FUEL TANK AND LINE MF-23
THROTTLE BODY MF-25
IDLE AIR CONTROL (IAC) VALVE MF-31
MASS AIR FLOW (MAF) METER MF-36
EFI MAIN RELAY MF-40
CIRCUIT OPENING RELAY MF-41
VSV FOR EVAPORATIVE EMISSION
(EVAP) MF-43
VSV FOR EXHAUST GAS
RECIRCULATION (EGR) MF-44
ENGINE COOLANT TEMPERATURE
(ECT) SENSOR MF-45
INTAKE AIR TEMPERATURE (IAT)
SENSOR MF-46
KNOCK SENSOR MF-47
EXHAUST GAS RECIRCULATION
(EGR) GAS TEMPERATURE SENSOR MF-48
HEATED OXYGEN SENSOR MF-49
ENGINE CONTROL MODULE (ECM) MF-50
FUEL CUT RPM MF-54

Downloaded from www.Manualslib.com manuals search engine FI7231
TOYOTA Hand−Held Tester
DLC3SF0AG−03
P24761
− MFI (3RZ−FE)FUEL PUMP
MF−5
957 Author: Date:
1996 TOYOTA T100 (RM449U)
FUEL PUMP
ON−VEHICLE INSPECTION
1. CHECK FUEL PUMP OPERATION
(a) Connect the TOYOTA hand−held tester to the DLC3.
(b) Turn the ignition switch ON and TOYOTA hand−held tes-
ter main switch ON.
NOTICE:
Do not start the engine.
(c) Select the active test mode on the TOYOTA hand−held
tester.
(d) Please refer to the TOYOTA hand−held tester
operator ’s manual for further details.
(e) If you have no TOYOTA hand−held tester, connect the
positive (+) and negative (−) leads from the battery to the
fuel pump connector.
(See page MF−10)
(f) Check that there is pressure in the hose from the fuel filter.
HINT:
At this time, you will hear fuel return noise.
If there is no pressure, check these parts:
Fusible links (AM1 40A, AM2 30A, ALT 80A)
Fuses (EFI 15A, IGN 7.5A)
EFI main relay
Fuel pump
ECM
Wiring connections
(g) Turn the ignition switch to LOCK.
(h) Remove the TOYOTA hand−held tester.
2. CHECK FUEL PRESSURE
(a) Check that the battery voltage is above 12 volts.
(b) Disconnect the negative (−) terminal cable from the bat-
tery.
(c) Remove the union bolt and 2 gaskets, and disconnect the
fuel inlet pipe from the delivery pipe.
HINT:
Put a suitable container or shop rag under the delivery
pipe.
Slowly loosen the union bolt.

Downloaded from www.Manualslib.com manuals search engine B02510
SF0BA−03
P07170
Ohmmeter
No
ContinuityContinuity
3Ohmmeter
2 1
5
P07171
Ohmmeter
3
2 1
5
Battery
MF−40
− MFI (3RZ−FE)EFI MAIN RELAY
992 Author: Date:
1996 TOYOTA T100 (RM449U)
EFI MAIN RELAY
INSPECTION
1. REMOVE EFI MAIN RELAY (Marking: EFI)
2. INSPECT EFI MAIN RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 2.
If there is no continuity, replace the relay.
(b) Check that there is no continuity between terminals 3 and
5.
If there is continuity, replace the relay.
3. INSPECT EFI MAIN RELAY OPERATION
(a) Apply battery voltage across terminals 1 and 2.
(b) Using an ohmmeter, check that there is continuity be-
tween terminals 3 and 5.
If there is no continuity, replace the relay.
4. REINSTALL EFI MAIN RELAY

Downloaded from www.Manualslib.com manuals search engine SF0BB−02
Z14696
− MFI (3RZ−FE)CIRCUIT OPENING RELAY
MF−41
993 Author: Date:
1996 TOYOTA T100 (RM449U)
CIRCUIT OPENING RELAY
COMPONENTS