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EC−8
−
EMISSION CONTROL EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
16. REMOVE TVV FROM CYLINDER HEAD
(a) Disconnect the 2 vacuum hoses.
(b) Remove the TVV.
17. INSPECT TVV OPERATION
(a) Cool the TVV to below 45° C (113°F) with cool water.
(b) Check that air flows from pipe J to the air filter.
(c) Heat the TVV to above 64° C (147°F) with hot water.
(d) Check that air flows from pipe J to pipe K.
If operation is not as specified, replace the TVV.
18. REINSTALL TVV
(a) Apply adhesive to 2 or 3 threads of the TVV, and install it.
Adhesive:
Part No. 08833 −00070, THREE BOND 1324
or equivalent
Torque: 29 N·m (300 kgf·cm, 22 ft·lbf)
(b) Reconnect 2 vacuum hoses.
19. REFILL WITH ENGINE COOLANT
20. REMOVE INTAKE MANIFOLD STAY
21. REMOVE VCV
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EC0JT−01
−
EMISSION CONTROL EXHAUST GAS RECIRCULATION (EGR) SYSTEM
EC−11
1996 LAND CRUISER (RM451U)
INSPECTION
1. INSPECT AND CLEAN FILTER IN EGR V ACUUM MOD-
ULATOR
(a) Remove the cap and filter.
(b) Check the filter for contamination or damage.
(c) Using compressed air, clean the filter.
(d) Reinstall the filter and cap.
HINT:
Install the filter with the coarser surface facing the atmospheric
side (outward).
2. INSTALL VACUUM GAUGE
Using a 3 −way connector, connect a vacuum gauge to the hose
between the EGR valve and EGR vacuum modulator.
3. INSPECT SEATING OF EGR VALVE
Start the engine and check that the engine starts and runs at
idle.
4. CONNECT TOYOTA HAND− HELD TESTER OR OBD II
SCAN TOOL (See page EM−10)
5. INSPECT VSV OPERATION WITH COLD ENGINE
(a) The engine coolant temperature should be below 47 °C
(117 °F).
(b) Check that the vacuum gauge indicates zero at 2,500 rpm.
(c) Check that the EGR pipe is not hot.
6. INSPECT OPERATION OF VSV AND EGR VACUUM
MODULATOR WITH HOT ENGINE
(a) Warm up the engine to above 53° C (127°F).
(b) Check that the vacuum gauge indicates low vacuum at 2,500 rpm.
(c) Disconnect the vacuum hose port R of the EGR vacuum modulator and connect port R directly to the air intake
chamber with another hose.
(d) Check that the vacuum gauge indicates high vacuum at 2,500 rpm.
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(a)
(b)
(c)
−
EMISSION CONTROL EXHAUST GAS RECIRCULATION (EGR) SYSTEM
EC−13
1996 LAND CRUISER (RM451U)
15. INSPECT VSV OPERATION
(a) Check that the air flows from pipe G to pipe E.
(b) Apply battery voltage across the terminals.
(c) Check that the air does not flows from pipe G to pipe E.
If operation is not as specified, replace the VSV.
16. RECONNECT VACUUM HOSES AND CONNECTOR
17. REINSTALL AIR INTAKE CHAMBER (See page
EM−54 )
18. DISCONNECT V ACUUM HOSES FROM EGR V ACUUM
MODULATOR
(a) Disconnect the vacuum hose from R port.
(b) Disconnect the vacuum hose from Q port.
(c) Disconnect the vacuum hose from P port.
19. INSPECT EGR VACUUM MODULATOR OPERATION
(a) Block ports P and R with your finger.
(b) Blow air into port Q, and check that the air passes through
to the air filter side freely.
(c) Start the engine, and maintain speed at 2,500 rpm.
(d) Repeat the above test. Check that there is a strong resis-
tance to air flow.
If operation is not as specified, replace the EGR vacuum modu-
lator.
20. RECONNECT VACUUM HOSES TO EGR VACUUM
MODULATOR
(a) Connect the vacuum hose to R port.
(b) Connect the vacuum hose to Q port.
(c) Connect the vacuum hose to P port.
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EM−2
−
ENGINE MECHANICAL CO/HC
505
Author: Date:
1996 LAND CRUISER (RM451U)
6. TROUBLESHOOTING
If the CO/HC concentration does not comply with regulations,
troubleshoot in the order given below.
See the table below for possible causes, and then inspect and
correct the applicable causes if necessary.
COHCProblemsCauses
NormalHighRough idle
3. Faulty ignitions:
Incorrect timing
Fouled, shorted or improperly gapped plugs
Open or crossed high −tension cords
Cracked distributor cap
4. Incorrect valve clearance
5. Leaky EGR valve
6. Leaky intake and exhaust valves
7. Leaky cylinders
LowHighRough idle
(Fluctuating HC reading)
1. Vacuum leaks:
PCV hose
EGR valve
Intake manifold
Air intake chamber
Throttle body
IAC valve
Brake booster line
2. Lean mixture causing misfire
HighHighRough idle
(Black smoke from exhaust)
1. Restricted air filter
2. Faulty SFI systems:
Faulty pressure regulator
Clogged fuel return line
Defective ECT sensor
Faulty ECM
Faulty injector
Faulty throttle position sensor
Faulty MAF meter
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−
ENGINE MECHANICAL CYLINDER HEAD
EM−29
1996 LAND CRUISER (RM451U)
16. DISCONNECT PS RESERVOIR TANK
Remove the 3 bolts and disconnect the reservoir tank.
17. DISCONNECT RADIATOR INLET HOSE
18. DISCONNECT NO. 3 WATER BYPASS HOSE
19. REMOVE GENERATOR (See page CH−8 )
20. REMOVE THROTTLE BODY (See page SF−45)
21. REMOVE OIL DIPSTICKS AND GUIDES FOR ENGINE AND TRANSMISSION
(a) Remove the 2 mounting bolts.
(b) Pull out the dipstick together with dipstick guide.
(c) Remove the O−ring from the dipstick guide.
22. REMOVE INTAKE MANIFOLD STAY
Remove the 2 bolts and intake manifold stay.
23. DISCONNECT FUEL INLET HOSE
Remove the union bolt and 2 gaskets, and disconnect the fuel
inlet hose from the fuel filter.
24. DISCONNECT ENGINE WIRE
(a) Disconnect the connectors. (1) Disconnect the ECT sender gauge connector.
(2) Disconnect the ECT cut switch connector.
(3) Disconnect the ECT sensor connector.
(4) Disconnect the knock sensor connector.
(5) Disconnect the crankshaft position sensor connec-tor.
(6) Remove the bolt and disconnect the engine wire from the cylinder block.
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EM−62
−
ENGINE MECHANICAL CYLINDER HEAD
1996 LAND CRUISER (RM451U)
(h) Connect the engine wire to the intake manifold and cylin-
der block with the 2 bolts.
(i) Connect the PNP switch connector.
(j) Connect the 2 heated oxygen sensor connectors.
(k) Connect the connectors.
(1) Connect the Knock sensor connector.
(2) Connect the oil level sensor connector.
(3) Connect the 2 connectors to tthe ransmission.
(4) Connect the starter connector.
(l) Connect the engine wire to the cylinder block with the bolt.
(m) Connect the connectors.
(1) Connect the ECT sender gauge connector.
(2) Connect the ECT cut switch connector.
(3) Connect the ECT sensor connector.
(4) Connect the knock sensor connector.
(5) Connect the crankshaft position sensor connector.
19. CONNECT FUEL INLET HOSE
Connect the fuel inlet hose to the fuel filter with 2 new gaskets
and the union bolt. Torque: 29 N·m (300 kgf·cm, 22 ft·lbf)
20. INSTALL INTAKE MANIFOLD STAY
Install the intake manifold stay with the 2 bolts. Torque: 36 N·m (360 kgf·cm, 26 ft·lbf)
21. INSTALL OIL DIPSTICKS AND GUIDES FOR ENGINE AND TRANSMISSION
(a) Install a new O−ring to the dipstick guide.
(b) Apply a light coat of engine oil on the O −ring.
(c) Push in the dipstick guide into the guide hole of the oil pan.
(d) Install the dipstick guide with the 2 bolts. Torque: 20 N·m (200 kgf·cm, 14 ft·lbf)
22. INSTALL THROTTLE BODY (See page SF−48)
23. INSTALL GENERATOR AND DRIVE BELTS (See page CH−19 )
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EM−70
−
ENGINE MECHANICAL ENGINE UNIT
1996 LAND CRUISER (RM451U)
13. DISCONNECT ENGINE WIRE AND HEATER VALVE
FROM COWL PANEL
(a) Remove the 2 bolts and disconnect the engine wire and
ground strap.
(b) Remove the 2 bolts and disconnect the heater valve.
14. DISCONNECT BRAKE BOOSTER VACUUM HOSE
15. DISCONNECT EVAP HOSE
16. DISCONNECT FUEL HOSES
(a) Disconnect the fuel return hose.
(b) Remove the union bolt and 2 gaskets, and disconnect the
fuel inlet hose from the fuel filter.
17. DISCONNECT WIRES AND CONNECTORS
(a) Disconnect the 2 heated oxygen sensor connectors.
(b) Disconnect the DLC1 clamp.
(c) Disconnect the 2 oil pressure gauge connectors.
(d) Disconnect the generator wire and connector.
(e) Disconnect the connector on the intake manifold from the
fender apron.
(f) Disconnect the high−tension cord from the ignition coil.
(g) Disconnect the ground strap from the No. 1 engine hang-
er.
(h) Disconnect the ground strap from the air intake chamber.
(i) Disconnect the starter wire.
(j) Disconnect the ground cable from the cylinder block.
18. DISCONNECT A/C COMPRESSOR AND BRACKET
(a) Loosen the idler pulley nut and adjusting bolt, and remove
the drive belt.
(b) Remove the 4 mounting bolts, and disconnect the com-
pressor from the bracket.
HINT:
Put aside the compressor, and suspend it.
(c) Remove the 5 bolts and A/C compressor bracket.
19. REMOVE RADIATOR PIPE
(a) Remove the 2 nuts holding the radiator pipe to the No. 1 oil pan.
(b) Disconnect the No. 2 radiator hose from the water inlet and remove the radiator pipe.
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EM−80
−
ENGINE MECHANICAL ENGINE UNIT
1996 LAND CRUISER (RM451U)
19. CONNECT ENGINE WIRE TO CABIN
(a) Push in the engine wire through the cowl panel.
(b) Connect the connectors.
(1) Connect the 3 connectors to the ECM.
(2) Connect the 2 connectors to the cowl wire.
(c) Connect the A/C amplifier with the screw.
(d) Install the speaker panel with the screw.
(e) Install the glove compartment door with the 2 screws.
20. CONNECT PS RETURN HOSE
Connect the return hose to the PS reservoir tank.
21. CONNECT PS PRESSURE HOSE
Connect the PS pressure hose with 2 new gaskets and the
union bolt. Torque: 56 N·m (575 kgf·cm, 42 ft·lbf)
22. INSTALL RADIATOR PIPE
(a) Connect the No. 2 radiator hose to the water inlet.
(b) Install the 2 nuts holding the radiator pipe to the No. 1 oil pan.
Torque: 21 N·m (210 kgf·cm, 15 ft·lbf)
23. INSTALL A/C COMPRESSOR AND BRACKET
(a) Install the A/C compressor bracket with the 5 bolts.
Torque: 37 N·m (375 kgf·cm, 27 ft·lbf)
(b) Install the A/C compressor with the 4 bolts. Torque: 25 N·m (250 kgf·cm, 18 ft·lbf)
(c) Install and adjust the drive belt (See page CH−2).
24. CONNECT WIRES AND CONNECTORS
(a) Connect the 2 heated oxygen sensor connectors.
(b) Connect the DLC1 clamp.
(c) Connect the 2 oil pressure gauge connectors.
(d) Connect the generator wire and connector.
(e) Connect the connector on the intake manifold to the fend-
er apron.
(f) Connect the high −tension cord to the ignition coil.
(g) Connect the ground strap to the No. 1 engine hanger.
(h) Connect the ground strap to the air intake chamber.
(i) Connect the starter wire.
(j) Connect the ground cable to the cylinder block.
25. CONNECT FUEL HOSES
(a) Connect the fuel inlet hose to the fuel filter with 2 new gas-
kets and the union bolt.
Torque: 29 N·m (300 kgf·cm, 22 ft·lbf)
(b) Connect the fuel return hose.
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