spark plugs replace TOYOTA LAND CRUISER 1986 Factory Repair Manual

CHECK POWER SUPPLY TO IGNITION COIL (WITH
SENSOR (See step 3)
SPARK TEST
Replace the crankshaft position sensor.
CHECK RESISTANCE OF CAMSHAFT POSITION
1. Turn ignition switch to ON.
2. Check that there is battery voltage at ignition coil positive (+)
terminal.
CHECK CONNECTION OF IGNITION COIL
CONNECTOR
Resistance:Cold Hot
CHECK RESISTANCE OF CRANKSHAFT POSITION
Resistance:Cold Hot 1,630 - 2,740 W2,065 - 3.225 W
CHECK IGT SIGNAL FROM ECM
(See page DI-202)
REPAIR WIRING BETWEEN IGNITION COIL
AND ECM
Replace the camshaft position sensor. Connect securely.
Check wiring between ignition switch
to ignition coil (with igniter).
Check ECM (See page IN-36)
NO
OK
OK
OK
OKBAD
BAD
BAD
BAD
BAD
SENSOR (See step 4) IGNITER) CHANGE IT TO NORMAL IGNITION COIL (WITH
IGNITER) AND PERFORM SPARK TEST AGAIN
OKReplace the ignition coil (with igniter).
NO
OK
985 - 1,600 W1,265 - 1,890 W
IG-2
- IGNITIONIGNITION SYSTEM
1805 Author
: Date
:
2004 LAND CRUISER (RM1071U)
If the spark does not occur, do the test as follows:
(7) Using a 16 mm plug wrench, install the spark plugs.
Torque: 17.5 N´m (180 kgf´cm, 13 ft´lbf)
(8) Reinstall the ignition coils (with igniter) (See page
IG-6).
2. INSPECT SPARK PLUGS
NOTICE:

Never use a wire brush for cleaning.

Never attempt to adjust the electrode gap on used
spark plug.

Spark plug should be replaced every 100,000 km
(60,000 miles).
(a) Remove the ignition coils (with igniter) (See page
IG-6).

IG0147
Megger
Ground
B01301
B03198
16 mm Plug Wrench
IG0316
B02101
1.1 mm
- IGNITIONIGNITION SYSTEM
IG-3
1806 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(b) Check the electrode.

Using a megger (insulation resistance meter), mea-
sure the insulation resistance.
Correct insulation resistance: 10 MW or more
If the resistance is less than specified, proceed to step (d).
HINT:
If a megger is not available, the following simple method of in-
spection provides fairly accurate results.

Simple Method:

Quickly race the engine to 4,000 rpm 5 times.

Remove the spark plug. (See step (c))

Visually check the spark plug.
If the electrode is dry ... OK.
If the electrode is wet ... Proceed to step (d).

Reinstall the spark plug. (See step (g))
(c) Using a 16 mm plug wrench, remove the spark plugs.
(d) Check the spark plug for thread damage and insulator
damage.
If abnormal, replace the spark plug.
Recommended spark plug:
DENSO madeSK20R11
NGK madeIFR6A11
(e) Check the spark plug electrode gap.
Maximum electrode gap for used spark plug:
1.3 mm (0.051 in.)
If the gap is greater than maximum, replace the spark plug.
Correct electrode gap for new spark plug:
1.1 mm (0.043 in.)
NOTICE:
If adjusting the gap of a new spark plug, bend only the base
of the ground electrode. Do not touch the tip. Never attempt
to adjust the gap on a used plug.

IG0152
B03199
Ohmmeter
B02713
Ohmmeter IG-4
- IGNITIONIGNITION SYSTEM
1807 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(f) Clean the spark plugs.
If the electrode has traces of wet carbon, allow it to dry and then
clean with a spark plug cleaner.
Air pressure: Below 588 kPa (6 kgf/cm
2, 85 psi)
Duration: 20 seconds or less
HINT:
If there are traces of oil, remove it with gasoline before using the
spark plug cleaner.
(g) Using a 16 mm plug wrench, install the spark plugs.
Torque: 17.5 N´m (180 kgf´cm, 13 ft´lbf)
(h) Reinstall the ignition coils (with igniter) (See page
IG-6).
3. INSPECT CAMSHAFT POSITION SENSOR
(a) Remove the V-bank cover.
(b) Disconnect the camshaft position sensor connector.
(c) Using an ohmmeter, measure the resistance between ter-
minals.
Resistance:
Cold835 - 1,400 W
Hot1,060 - 1,645 W
If the resistance is not as specified, replace the camshaft posi-
tion sensor.
(d) Reconnect the camshaft position sensor connector.
(e) Reinstall the V-bank cover.
4. INSPECT CRANKSHAFT POSITION SENSOR
(a) Remove the crankshaft position sensor (See page
IG-12).
(b) Using an ohmmeter, measure the resistance between the
terminals.
Resistance:
Cold1,630 - 2,740 W
Hot2,065 - 3,225 W
If the resistance is not as specified, replace the crankshaft posi-
tion sensor.
(c) Reinstall the crankshaft position sensor.

MA02S-01
MA-6
- MAINTENANCEENGINE
54 Author
: Date
:
2004 LAND CRUISER (RM1071U)
ENGINE
INSPECTION
HINT:
Inspect these items when the engine is cold.
1. REPLACE TIMING BELT (See page EM-15)
2. INSPECT VALVE CLEARANCE (See page EM-4)
3. INSPECT DRIVE BELT (See page CH-2)
4. REPLACE ENGINE OIL AND OIL FILTER (See page LU-2)
5. REPLACE ENGINE COOLANT (See page CO-2)
6. INSPECT EXHAUST PIPES AND MOUNTINGS
Visually inspect the pipes, hangers and connections for severe corrosion, leaks or damage.
7. REPLACE AIR CLEANER FILTER
Replace the air cleaner filter with a new one.
8. INSPECT FUEL LINES, CONNECTIONS AND FUEL VAPOR CONTROL VALVE (See page
EC-5)
Visually inspect the fuel lines for cracks, leakage loose connections, deformation or tank band looseness.
9. INSPECT GASKET IN FUEL TANK CAP (See page EC-5)
10. REPLACE SPARK PLUGS (See page IG-1)
11. California, Massachusetts and New York:
INSPECT CHARCOAL CANISTER (See page EC-5)