1996 TOYOTA LAND CRUISER Workshop Manual

SF1ER−01
P22902
P22624
−
SFI MASS AIR FLOW (MAF) METER
SF−39
1996 LAND CRUISER (RM451U)
REMOVAL
1. REMOVE AIR CLEANER CAP AND MAF METER
(a) Disconnect the MAF meter connector and wire clamp.
(b) Disconnect the cruise control actuator cable.
(c) Loosen the air cleaner hose clamp.
(d) Disconnect the 3 clips, and remove the wing nut, air
cleaner cap and MAF meter.
2. REMOVE MAF METER
Remove the 4 bolts, bracket and MAF meter. Torque: 6.9 N·m (70 kgf·cm, 61 in.·lbf)
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SF1ES−01
FI6961
Z11824
SF−40
−
SFI MASS AIR FLOW (MAF) METER
1996 LAND CRUISER (RM451U)
INSPECTION
1. INSPECT MAF METER RESISTANCE
Using an ohmmeter, measure the resistance between terminals
THA and E2.
Between
terminalsResistanceTemperature
THA − E210 − 20 kΩ−20°C (− 4°F)
THA − E24 − 7 kΩ0°C (32° F)
THA − E22 − 3 kΩ20°C (68° F)
THA − E20.9 − 1.3 kΩ40°C (104° F)
THA − E20.4 − 0.7 kΩ60°C (140° F)
THA − E20.2 − 0.4 kΩ80°C (176° F)
If the resistance is not as specified, replace the MAF meter.
2. INSPECT MAF METER OPERATION
(a) Connect the MAF meter connector.
(b) Using a voltmeter, connect the positive (+) tester probe to
terminal VG, and negative ( −) tester probe to terminal E3.
(c) Blow air into the MAF meter, and check that the voltage
fluctuates.
If operation is not as specified, replace the MAF meter.
(d) Disconnect the MAF meter connector.
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SF1ET−01
−
SFI MASS AIR FLOW (MAF) METER
SF−41
1996 LAND CRUISER (RM451U)
INSTALLATION
Installation is in the reverse order of removal (See page SF−39 ).
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SF1EU−01
SF−42
−
SFI THROTTLE BODY
670
Author: Date:
1996 LAND CRUISER (RM451U)
THROTTLE BODY
ON−VEHICLE INSPECTION
1. INSPECT THROTTLE BODY
(a) Check that the throttle linkage moves smoothly.
(b) Check the vacuum at each port.
Start the engine.
Check the vacuum with your finger.
Port nameAt idleAt 3,500 rpm
PNo vacuumVacuum
ENo vacuumVacuum
RNo vacuumVacuum
2. INSPECT THROTTLE POSITION (TP) SENSOR
(a) Disconnect the TP sensor connector.
(b) Apply vacuum to the throttle opener.
(c) Using an ohmmeter, measure the resistance between
each terminal.
Throttle valve
conditionBetween terminalsResistance
Fully closedVTA − E20.2 − 5.7 kΩ
Fully closedIDL − E22.3 kΩ or less
OpenIDL − E2Infinity
Fully openVTA − E22.0 − 10.2 kΩ
−VC − E22.5 − 5.9 kΩ
(d) Reconnect the TP sensor connector.
3. INSPECT AND ADJUST DASHPOT
(a) Allow the engine to warm up to normal operating tempera-
ture.
(b) Check the idle speed.
Idle speed: 650 ± 50 rpm (N position)
(c) Open the throttle valve until the throttle lever separates from the dashpot end.
(d) Release the throttle valve gradually, and check the dash-
pot setting speed when the throttle lever touched the
dashpot end.
Dashpot setting speed: 2,200 ± 300 rpm
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−
SFI THROTTLE BODY
SF−43
671
Author: Date:
1996 LAND CRUISER (RM451U)
If not as specified, adjust using the following procedure:
(1) Stop the engine.
(2) Loosen the lock nut of the stopper bolt.
(3) Adjust the dashpot setting speed by turning thestopper bolt.
(4) Start the engine and check the dashpot setting speed.
(5) Retighten the lock nut.
(e) Maintain the engine at 3,500 rpm.
(f) Release the throttle valve, and check that the engine re- turns to idle in a few seconds.
4. CHECK THROTTLE OPENER
(a) Disconnect the vacuum hose from the throttle opener, and plug the hose end.
(b) Check the throttle opener setting speed. Throttle opener setting speed: 700 − 1,000 rpm
If the throttle opener setting is not as specified, replace the
throttle body.
(c) Stop the engine.
(d) Reconnect the vacuum hose to the throttle opener.
(e) Start the engine, and check that the idle speed returns to the correct speed.
Idle speed: 650 ± 50 rpm (N position)
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SF1EV−01
SF−44
−
SFI THROTTLE BODY
1996 LAND CRUISER (RM451U)
COMPONENTS
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SF1EW−04
−
SFI THROTTLE BODY
SF−45
1996 LAND CRUISER (RM451U)
REMOVAL
1. DRAIN ENGINE COOLANT
2. DISCONNECT NO.2 PCV HOSE
3. DISCONNECT AIR CLEANER HOSE
4. DISCONNECT CONTROL CABLES FROM THROTTLE
BODY
5. DISCONNECT THROTTLE POSITION SENSOR CON-
NECTOR
6. DISCONNECT IDLE AIR CONTROL VALVE CONNEC- TOR
7. REMOVE THROTTLE BODY
(a) Disconnect the EVAP hose.
(b) Disconnect the 3 vacuum hoses.
(c) Disconnect the No.2 water bypass hose.
(d) Remove the 4 bolts, and disconnect the throttle body from
the air intake chamber.
Torque: 21 N·m (210 kgf·cm, 15 ft·lbf)
(e) Remove the throttle body gasket.
HINT:
At the time of installation, plaese refer to the following items.
install a new gasket on the air intake chamber.
(f) Disconnect the No.1 water bypass hose from the throttle
body, and remove the throttle body.
(g) Disconnect the No.2 water bypass hose from the throttle
body.
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SF1EX−01
SF−46
−
SFI THROTTLE BODY
1996 LAND CRUISER (RM451U)
INSPECTION
1. CLEAN THROTTLE BODY
(a) Using a soft brush and carburetor cleaner, clean the cast parts.
(b) Using compressed air, clean all the passages and aper- tures.
NOTICE:
To prevent deterioration, do not clean the throttle position
sensor, dashpot and IAC valve.
2. INSPECT THROTTLE VALVE
(a) Apply vacuum to the throttle opener.
(b) 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) Apply vacuum to the throttle opener.
(b) Insert a 0.50 mm (0.020 in.) or 0.75 mm (0.030 in.) feeler
gauge between the throttle stop screw and stop lever.
(c) 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 kΩ
0.50 mm (0.020 in.)IDL − E22.3 kΩ or less
0.75 mm (0.030 in.)IDL − E2Infinity
Throttle valve fully
openVTA − E22.0 − 10.2 kΩ
−VC − E22.5 − 5.9 kΩ
4. IF NECESSARY, ADJUST THROTTLE POSITION SEN-
SOR
(a) Loosen the 2 set screws of the sensor.
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