TOYOTA T100 1996 Factory Service Manual

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− MFI (3RZ−FE)MASS AIR FLOW (MAF) METER
MF−37
1996 TOYOTA T100 (RM449U)
REMOVAL
1. REMOVE AIR CLEANER CAP AND MAF METER
(a) Disconnect the MAF meter connector, IAT sensor con-
nector and wire clamp.
(b) Loosen the air cleaner hose clamp.
(c) Loosen the 4 clips, and remove the air cleaner cap and
MAF meter.
2. REMOVE MAF METER FROM AIR CLEANER CAP
(a) Remove the 4 nuts, MAF meter and gasket.
(b) Remove the IAT sensor from air cleaner cap.

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P15781
MF−38
− MFI (3RZ−FE)MASS AIR FLOW (MAF) METER
1996 TOYOTA T100 (RM449U)
INSPECTION
INSPECT MAF METER OPERATION
(a) Connect negative (−) terminal cable to battery.
(b) Turn the ignition switch ON.
(c) Connect the MAF meter connector.
(d) Using a voltmeter, connect the positive (+) tester probe to
terminal VG, and negative (−) tester probe to terminal E3.
(e) Blow air into the MAF meter, and check that the voltage
fluctuates.
If operation is not as specified, replace the MAF meter.
(f) Turn the ignition switch OFF.
(g) Disconnect negative (−) terminal cable from battery.
(h) Disconnect the MAF meter connector.

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− MFI (3RZ−FE)MASS AIR FLOW (MAF) METER
MF−39
1996 TOYOTA T100 (RM449U)
INSTALLATION
1. INSTALL MAF METER TO AIR CLEANER CAP
(a) Install the IAT sensor to the air cleaner cap.
(b) Place a new gasket on the air cleaner cap.
(c) Install the MAF meter with the 4 nuts.
Torque: 8.5 N·m (87 kgf·cm, 75 in.·lbf)
2. INSTALL MAF METER AND AIR CLEANER CAP

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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

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Z14696
− MFI (3RZ−FE)CIRCUIT OPENING RELAY
MF−41
993 Author: Date:
1996 TOYOTA T100 (RM449U)
CIRCUIT OPENING RELAY
COMPONENTS

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FI1908
FI1909
MF−42
− MFI (3RZ−FE)CIRCUIT OPENING RELAY
1996 TOYOTA T100 (RM449U)
INSPECTION
1. REMOVE GLOVE COMPARTMENT DOOR
2. REMOVE CIRCUIT OPENING RELAY
3. INSPECT CIRCUIT OPENING RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals STA and E1.
If there is no continuity, replace the relay.
(b) Check that there is continuity between terminals +B and
FC.
If there is no continuity, replace the relay.
(c) Check that there is no continuity between terminals +B
and FP.
If there is continuity, replace the relay.
4. INSPECT CIRCUIT OPENING RELAY OPERATION
(a) Apply battery voltage across terminals STA and E1.
(b) Using an ohmmeter, check that there is continuity be-
tween terminals +B and FP.
If there is no continuity, replace the relay.
5. REINSTALL CIRCUIT OPENING RELAY
6. REINSTALL GLOVE COMPARTMENT DOOR

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P15773
SF0BE−01
P15772
P15771
− MFI (3RZ−FE)VSV FOR EVAPORATIVE EMISSION (EVAP)
MF−43
995 Author: Date:
1996 TOYOTA T100 (RM449U)
VSV FOR EVAPORATIVE
EMISSION (EVAP)
INSPECTION
1. INSPECT VSV FOR OPEN CIRCUIT
Using an ohmmeter, check that there is continuity between the
terminals.
Resistance: 30 − 34 Ω at 20°C (68°F)
If there is no continuity, replace the VSV.
2. INSPECT VSV FOR GROUND
Using an ohmmeter, check that there is no continuity between
each terminal and the body.
If there is continuity, replace the VSV.
3. INSPECT VSV OPERATION
(a) Check that air does not flow from pipe E to pipe F.
(b) Apply battery voltage across the terminals.
(c) Check that air flows from pipe E to pipe F.
If operation is not as specified, replace the VSV.

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Ohmmeter
Continuity
SF0BD−01
P15764
Ohmmeter
No Continuity
P15765
Air
E
F
P15766
Air
E
F Battery MF−44
− MFI (3RZ−FE)VSV FOR EXHAUST GAS RECIRCULATION (EGR)
SYSTEM
996 Author: Date:
1996 TOYOTA T100 (RM449U)
VSV FOR EXHAUST GAS
RECIRCULATION (EGR)
INSPECTION
1. INSPECT VSV FOR OPEN CIRCUIT
Using an ohmmeter, check that there is continuity between the
terminals.
Resistance: 33 − 39 Ω at 20°C (68°F)
If there is no continuity, replace the VSV.
2. INSPECT VSV FOR GROUND
Using an ohmmeter, check that there is no continuity between
each terminal and the body.
If there is continuity, replace the VSV.
3. INSPECT VSV OPERATION
(a) Check that air does not flow from pipe E to pipe F.
(b) Apply battery voltage across the terminals.
(c) Check that air flows from pipe E to pipe F.
If operation is not as specified, replace the VSV.

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Z02917
Ohmmeter
Acceptable
TEMPERATURE °C (°F)
RESISTANCE kΩ
SF0BG−02
− MFI (3RZ−FE)ENGINE COOLANT TEMPERATURE (ECT) SENSOR
MF−45
997 Author: Date:
1996 TOYOTA T100 (RM449U)
ENGINE COOLANT
TEMPERATURE (ECT) SENSOR
INSPECTION
1. DRAIN ENGINE COOLANT
2. REMOVE ENGINE COOLANT TEMPERATURE
SENSOR
(a) Disconnect the ECT sensor connector.
(b) Using a 19 mm deep socket wrench, remove the ECT
sensor and gasket.
3. INSPECT ENGINE COOLANT TEMPERATURE
SENSOR
Using an ohmmeter, measure the resistance between the ter-
minals.
Resistance: Refer to the chart graph
If the resistance is not as specified, replace the ECT sensor.
4. REINSTALL ENGINE COOLANT TEMPERATURE
SENSOR
(a) Using a 19 mm deep socket wrench, install the ECT sen-
sor and gasket.
Torque: 20 N·m (200 kgf·cm, 14 ft·lbf)
(b) Connect the ECT sensor connector.
5. REFILL ENGINE COOLANT

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Z02772
Ohmmeter
Acceptable
TEMPERATURE °C (°F)
RESISTANCE kΩ
30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
−20 0 20 40 60 80 100
(−4) (32) (68)(104)(140)(176)(212) MF−46
− MFI (3RZ−FE)INTAKE AIR TEMPERATURE (IAT) SENSOR
998 Author: Date:
1996 TOYOTA T100 (RM449U)
INTAKE AIR TEMPERATURE (IAT)
SENSOR
INSPECTION
1. REMOVE IAT SENSOR
2. INSPECT IAT SENSOR
Using an ohmmeter, measure the resistance between the ter-
minals.
Resistance: Refer to the chart graph
If the resistance is not as specified, replace the IAT sensor.
3. REINSTALL IAT SENSOR