1996 TOYOTA LAND CRUISER Ect

−
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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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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−
SFI THROTTLE BODY
SF−47
1996 LAND CRUISER (RM451U)
(b) Apply vacuum to the throttle opener.
(c) Insert a 0.62 mm (0.024 in.) feeler gauge between the
throttle stop screw and stop lever.
(d) Connect the test probe of an ohmmeter to the terminals IDL and E2 of the sensor.
(e) Gradually turn the sensor clockwise until the ohmmeter deflects, and secure it with the 2 set screws.
(f) Recheck the continuity between terminals IDL and E2.
Clearance between
lever and stop screwContinuity (IDL − E2)
0.50 mm (0.020 in.)Continuity
0.75 mm (0.030 in.)No continuity
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SF1EZ−01
−
SFI IDLE AIR CONTROL (IAC) VALVE
SF−49
677
Author: Date:
1996 LAND CRUISER (RM451U)
IDLE AIR CONTROL (IAC) VALVE
ON−VEHICLE INSPECTION
1. INSPECT IAC VALVE FOR OPERATING SOUND
Check that there is a clicking sound immediately after stopping
the engine.
If the operation is not as specified, check the IAC valve, wiring
and ECM.
2. INSPECT IAC VALVE RESISTANCE
(a) Disconnect the IAC valve connector.
(b) Using an ohmmeter, measure the resistance between the
terminals (B1 −S1 and S3, B2−S2 and S4).
Resistance:
At Cold: −10 − 50°C (−50 − 122°F): 15 − 25 Ω
At Hot: 50 −100°C (122 − 212° F): 20 − 30 Ω
If resistance is not as specified, replace the IAC valve.
(c) Reconnect the IAC valve connector.
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SF1F2−01
SF−52
−
SFI IDLE AIR CONTROL (IAC) VALVE
1996 LAND CRUISER (RM451U)
INSPECTION
INSPECT IDLE AIR CONTROL VALVE OPERATION
(a) Apply battery voltage to terminals B1 and B2, and while repeatedly grounding S1 −S2−S3−S4−S1 in sequence,
and check that the valve moves toward the closed posi-
tion.
(b) Apply battery voltage to terminals B1 and B2, and while repeatedly grounding S4 −S3−S2−S1−S4 in sequence,
and check that the valve moves toward the open position.
If operation is not as specified, replace the IAC valve.
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SF06G−11
P05668
OhmmeterContinuity
No Continuity Ohmmeter
1
2
43
P05667
Ohmmeter Continuity
Battery
1
2
4 3
SF−54
−
SFI EFI MAIN RELAY
682
Author: Date:
1996 LAND CRUISER (RM451U)
EFI MAIN RELAY
INSPECTION
1. REMOVE EFI MAIN RELAY
LOCATION: In the engine compartment relay box.
2. INSPECT EFI MAIN RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 3.
(b) Check that there is no continuity between terminals 2 and
4.
If continuity is not as specified, replace the relay.
3. INSPECT EFI MAIN RELAY OPERATION
(a) Apply battery voltage across terminals 1 and 3.
(b) Using an ohmmeter, check that there is continuity be-
tween terminals 2 and 4.
If operation is not as specified, replace the relay.
4. REINSTALL EFI MAIN RELAY
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SF1F5−01
P05668
OhmmeterContinuity
Ohmmeter
No Continuity
1
2
43
P05667
Ohmmeter 1
2
3
4 Battery
SF−56
−
SFI CIRCUIT OPENING RELAY
1996 LAND CRUISER (RM451U)
INSPECTION
1. REMOVE CIRCUIT OPENING RELAY
2. INSPECT CIRCUIT OPENING RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be- tween terminals 1 and 3.
(b) Check that there is no continuity between terminals 2 and
4.
If continuity is not as specified, replace the relay.
3. INSPECT CIRCUIT OPENING RELAY OPERATION
(a) Apply battery voltage across terminals 1 and 3.
(b) Using an ohmmeter, check that there is continuity be- tween terminals 2 and 4.
If operation is not as specified, replace the relay.
4. REINSTALL CIRCUIT OPENING RELAY
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