sensor TOYOTA TERCEL 1996 Service Repair Manual

SF1PQ-02
- MFIMFI SYSTEM
MF-1
525 Author
: Date
:
1996 TERCEL (RM440U)
MFI SYSTEM
PRECAUTION
1. BEFORE WORKING ON FUEL SYSTEM, DISCON-
NECT NEGATIVE (-) TERMINAL CABLE FROM BAT-
TERY
HINT:
Any diagnostic trouble code retained by the computer will be
erased when the negative (-) terminal cable is disconnected.
Therefore, if necessary, read the diagnosis before disconnect-
ing the negative (-) terminal cable from the battery.
2. DO NOT SMOKE OR WORK NEAR AN OPEN FLAME
WHEN WORKING ON THE FUEL SYSTEM
3. KEEP GASOLINE AWAY FROM RUBBER OR LEATH-
ER PARTS
4. MAINTENANCE PRECAUTIONS
(a) In event of engine misfire, the following precautions
should be taken.
(1) Check proper connection to battery terminals, etc.
(2) Handle higt-tension cords carefully.
(3) After repair work, check that the ignition coil termi-
nals and all other ignition system lines are recon-
nected securely.
(4) When cleaning the engine compartment, be espe-
cially careful to protect the electrical system from
water.
(b) Precautions when handling the oxygen sensor.
(1) Do not allow the oxygen sensor to drop or hit
against an object.
(2) Do not allow the sensor to come into contact with
water.
5. IF VEHICLE IS EQUIPPED WITH MOBILE RADIO SYS-
TEM (HAM, CB, ETC.)
If the vehicle is equipped with a mobile communication system,
refer to the precaution in the IN section.
6. AIR INDUCTION SYSTEM
(a) Separation of the engine oil dipstick, oil filler cap, PCV
hose, etc. may cause the engine out of tune.
(b) Disconnection, looseness or cracks in the parts of the air
induction system between the throttle body and cylinder
head will cause air suction and cause the engine out of
tune.
7. ELECTRONIC CONTROL SYSTEM
(a) Before removing MFI wiring connectors, terminals, etc.,
first disconnect the power by either turning the ignition
switch to LOCK or disconnecting the negative (-) terminal
cable from the battery.

SF1PW-01
MF-26
- MFITHROTTLE BODY
550 Author
: Date
:
1996 TERCEL (RM440U)
THROTTLE BODY
ON-VEHICLE INSPECTION
1. INSPECT THROTTLE BODY
(a) Check that the throttle linkage moves smoothly.
(b) Check the vacuum at port.
(1) Start the engine.
(2) Check the vacuum with your finger.
Port nameAt idleOther than idle
PNo vacuumVacuum
ENo vacuumVacuum
RNo vacuumNo vacuum
2. INSPECT THROTTLE POSITION SENSOR
(a) A/T:
Disconnect the throttle cable from the linkage.
(b) Disconnect the sensor connector.
(c) Insert feeler gauge between the throttle stop screw and
stop lever.
(d) Using an ohmmeter, measure the resistance between
each terminal.
Clearance between
lever and stop screwBetween
terminalsResistance
0 mm (0 in.)VTA - E20.2 - 5.7 kW
0.50 mm (0.020 in.)IDL - E22.3 kW or less
0.70 mm (0.028 in.)IDL - E2Infinity
Throttle valve
fully openedVTA - E22.0 - 10.2 kW
-VC - E22.5 - 5.9 kW
(e) Reconnect the sensor connector.
(f) A/T:
Reconnect the throttle cable.

SF1PX-01
(a)
(b)
(a)
(b)
(c)(d)(e)
MF-28
- MFITHROTTLE BODY
1996 TERCEL (RM440U)
REMOVAL
1. DRAIN ENGINE COOLANT
2. REMOVE AIR CLEANER CAP
3. DISCONNECT CONTROL CABLES FROM THROTTLE
BODY
(a) Disconnect the accelerator cable
(b) Disconnect the A/T throttle cable.
4. REMOVE THROTTLE BODY
(a) Disconnect the throttle position sensor connector and
wire clamp.
(b) Disconnect the IAC valve connector.
(c) Disconnect the vacuum hose (from upper port of TVV of
EVAP) from port ºPº of throttle body.
(d) Disconnect the vacuum hose (from port ºPº of EGR vacu-
um modulator) from port ºEº of throttle body.
(e) Disconnect the vacuum hose (from port ºRº of EGR vacu-
um modulator) from port ºRº of throttle body.
(f) Remove the 2 nuts and 2 bolts.
Torque: 19.5 N´m (195 kgf´cm, 14 ft´lbf)
(g) Disconnect the throttle body from the intake manifold.
(h) Remove the gasket.
HINT:
At the time of installation, plaese refer to the following items. At-
tach a new gasket to the intake manifold, facing the protrusion
downward.

SF1PY-01
MF-30
- MFITHROTTLE BODY
1996 TERCEL (RM440U)
INSPECTION
1. CLEAN THROTTLE BODY
(a) Wash and clean the cast part with a soft brush and carbu-
retor cleaner.
(b) Using compressed air, blow all passages and apertures
in the throttle body.
NOTICE:
To prevent deterioration, do not clean the throttle position
senser.
2. INSPECT THROTTLE VALVE
Check that there is no clearance between the throttle stop
screw and throttle lever when the throttle valve is fully closed.
3. INSPECT THROTTLE POSITION SENSOR
(a) Insert a 0.050 mm (0.020 in.) or 0.70 mm (0.028 in.) feeler
gauge between the throttle stop screw and stop lever.
(b) Using an ohmmeter, measure the resistance between
each terminal.
Clearance between
lever and stop screwBetween terminalsResistance
0 mm (0 in.)VTA - E20.2 - 5.7 kW
0.50 mm (0.020 in.)IDL - E22.3 kW or less
0.70 mm (0.028 in.)IDL - E2Infinity
Throttle valve fully
openVTA - E22.0 - 10.2 kW
-VC - E22.5 - 5.9 kW

- MFITHROTTLE BODY
MF-31
1996 TERCEL (RM440U)
4. IF NECESSARY, ADJUST THROTTLE POSITION SEN-
SOR
(a) Loosen the 2 set screws of the sensor.
(b) Insert a 0.60 mm (0.024 in.) feeler gauge between the
throttle stop screw and stop lever.
(c) Connect the tester probe of an ohmmeter to the terminals
IDL and E2 of the sensor.
(d) Gradually turn the sensor clockwise until the ohmmeter
deflects, and secure it with the 2 set screws.
(e) Recheck the continuity between terminals IDL and E2.
Clearance between
lever and stop screwContinuity (IDL - E2)
0.50 mm (0.020 in.)Continuity
0.70 mm (0.028 in.)No continuity

SF0XP-05
- MFIENGINE COOLANT TEMPERATURE (ECT) SENSOR
MF-43
567 Author
: Date
:
1996 TERCEL (RM440U)
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
COMPONENTS

SF0XQ-05
Z02917
Ohmmeter
Resistance kW
Temperature °C (°F) Acceptable MF-44
- MFIENGINE COOLANT TEMPERATURE (ECT) SENSOR
1996 TERCEL (RM440U)
INSPECTION
1. DRAIN ENGINE COOLANT
2. REMOVE ECT SENSOR
3. INSPECT ECT SENSOR
Using an ohmmeter, measure the resistance between the ter-
minals.
Resistance: Refer to the graph
If the resistance is not as specified, replace the ECT sensor.
4. REINSTALL ECT SENSOR
5. REFILL WITH ENGINE COOLANT

SF0XR-03
- MFIINTAKE AIR TEMPERATURE (IAT) SENSOR
MF-45
569 Author
: Date
:
1996 TERCEL (RM440U)
INTAKE AIR TEMPERATURE (IAT) SENSOR
COMPONENTS

SF0XS-04
Z02772
Ohmmeter
Resistance kW
Temperature °C (°F) Acceptable 30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
40 -20 0 20 60 80 100
(212) (176) (140) (104) (68) (32) (-4)
MF-46
- MFIINTAKE AIR TEMPERATURE (IAT) SENSOR
1996 TERCEL (RM440U)
INSPECTION
1. REMOVE IAT SENSOR
2. INSPECT IAT SENSOR
Using an ohmmeter, measure the resistance between the ter-
minals.
Resistance: Refer to the graph
If the resistance is not as specified, replace the sensor.
3. REINSTALL IAT SENSOR

SF0WO-03
- MFIMANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
MF-47
571 Author
: Date
:
1996 TERCEL (RM440U)
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
COMPONENTS