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Input SignalIndicator Light
Blinking Pattern
Turn PNP switch
OFF (Shift to
except D position)
LightON
OFF SW ON
SW OFF
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
DI−323
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Check starter operation.
CHECK:
Check that the starter operates normally and that the engine starts.
NG Proceed to engine troubleshooting (See page DI−1).
OK
2 Input signal check.
PREPARATION:
See input signal check on page DI−286.
CHECK:
Check the indicator light when shifting into except D position.
OK:
The indicator light goes off when shifting into except
D position.
OK Proceed to next circuit inspection shown on problem symptoms table (See page DI−295 ).
NG
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EC0GB−01
EC3069
Gasket
Check Valve (V acuum Valve)
EC−6
−
EMISSION CONTROL EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
INSPECTION
1. VISUALLY INSPECT LINES AND CONNECTIONS
Look for loose connections, sharp bends or damage.
2. VISUALLY INSPECT FUEL TANK
Look for deformation, cracks or fuel leakage.
3. VISUALLY INSPECT FUEL TANK CAP
Check if the cap and/or gasket are deformed or damaged.
If necessary, repair or replace the cap.
4. INSPECT TVV OPERATION WITH COLD ENGINE
(a) The engine coolant temperature should be below 45 °C
(113 °F).
(b) Disconnect the EVAP hose from the union pipe.
(c) Start the engine.
(d) Gradually increase the engine speed from idle to 3,000 rpm and check that air suction is not felt at the union pipe.
5. INSPECT OPERATION OF VCV WITH HOT ENGINE
(a) Warm up the engine.
(b) With the engine idling, check that air suction is not felt at union pipe.
(c) Gradually increase the engine speed to 3,000 rpm and check that there is air suction at the union pipe.
(d) Reconnect the EVAP hose to the union pipe.
If no problem is found with this inspection, system is normal;
otherwise inspect each part.
6. REMOVE CHARCOAL CANISTER WITH BRACKET
7. REMOVE CHARCOAL CANISTER FROM BRACKET
8. REMOVE CAP FROM CHARCOAL CANISTER
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EMISSION CONTROL EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
EC−7
1996 LAND CRUISER (RM451U)
9. VISUALLY INSPECT CHARCOAL CANISTER
Look for cracks or damage.
10. INSPECT FOR CLOGGED FILTER AND STUCK VALVE
(a) Using low pressure compressed air (7.26 kPa, 74 gf/cm
2,
1.05 psi), blow into tank pipe and check that air flows with-
out resistance from the other pipes.
(b) While holding drain pipe closed, blow air (1.96 kPa, 20 gf/
cm
2, 0.28 psi) into purge pipe and check that air flow with-
out resistance from tank pipe.
If a problem is found, replace the charcoal canister.
11. CLEAN FILTER IN CANISTER
Clean the filter by blowing 294 kPa (3 kgf/cm
2, 43 psi) of com-
pressed air into tank pipe while holding purge pipe closed.
NOTICE:
Do not attempt to wash the canister.No activated carbon
should come out.
12. REINSTALL CAP TO CHARCOAL CANISTER
13. REINSTALL CHARCOAL CANISTER TO BRACKET Torque: 14 N·m (145 kgf·cm, 10 ft·lbf)
14. REINSTALL CHARCOAL CANISTER WITH BRACKET Torque: 18 N·m (185 kgf·cm, 13 ft·lbf)
15. DRAIN ENGINE COOLANT
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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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EC−12
−
EMISSION CONTROL EXHAUST GAS RECIRCULATION (EGR) SYSTEM
1996 LAND CRUISER (RM451U)
HINT:
As a large amount of exhaust gas enters, the engine will misfire
slightly.
7. DISCONNECT TOYOTA HAND −HELD TESTER OR
OBD II SCAN TOOL
8. REMOVE VACUUM GAUGE
Remove the vacuum gauge, and reconnect the vacuum hoses
to the proper locations.
9. INSPECT EGR VALVE
(a) Apply vacuum directly to the EGR valve with the engine idle.
(b) Check that the engine runs rough or dies.
(c) Reconnect the vacuum hoses to the proper locations.
If no problem is found with this inspection, system is normal;
otherwise inspect each part.
10. CANCEL DIAGNOSTIC TROUBLE CODE
11. REMOVE AIR INTAKE CHAMBER (See page EM−28)
12. DISCONNECT VACUUM HOSES AND CONNECTOR
13. 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.
14. 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.
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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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EC−14
−
EMISSION CONTROL EXHAUST GAS RECIRCULATION (EGR) SYSTEM
1996 LAND CRUISER (RM451U)
21. REMOVE EGR VACUUM MODULATOR
22. REMOVE EGR VALVE
(a) Disconnect the vacuum hose from the EGR valve.
(b) Disconnect the engine wire from the clamp.
(c) Loosen the EGR pipe union nut.
(d) Remove the 2 nuts holding the EGR valve to the air intake
chamber.
(e) Using 2 nuts, remove the 2 stud bolts, EGR valve and gasket.
23. INSPECT EGR VALVE
Check for sticking and heavy carbon deposits.
If a problem is found, replace the valve.
24. REINSTALL EGR VALVE
(a) Using 2 nuts, temporarily install a new gasket, and EGR valve with the 2 stud bolts.
Torque: 9 N·m (90 kgf·cm, 78 in.·lbf)
(b) Install the 2 nuts holding the EGR valve to the air intake
chamber.
Torque: 18 N·m (180 kgf·cm, 13 ft·lbf)
(c) Tighten the union nut of the EGR pipe. Torque: 64 N·m (650 kgf·cm, 47 ft·lbf)
(d) Connect the engine wire to the clamp.
(e) Connect the vacuum hose to the EGR valve.
25. REINSTALL EGR VACUUM MODULATOR
Torque: 18 N·m (185 kgf·cm, 13 ft·lbf)
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