B11562
P17875
Ohmmeter
IG0147
Megger
Ground
N00917
− IGNITIONIGNITION SYSTEM
IG−3
1996 RAV4 (RM447U)
2. INSPECT HIGH−TENSION CORDS
(a) Disconnect the high−tension cords from spark plug.
Disconnect the high−tension cords at the rubber boot. Do
not pull on the high−tension cords.
NOTICE:
Pulling on or bending the cords may damage the conductor
inside.
(b) Disconnect the high−tension cords from ignition coil.
(c) Disconnect the high−tension cords from distributor cap.
(d) Inspect the high−tension cord resistance.
Using an ohmmeter, measure the resistance.
Maximum resistance: 25 kΩ per cord
If the resistance is greater than maximum, check the terminals.
If necessary, replace the high−tension cord.
(e) Reconnect the high−tension cords to distributor cap.
(f) Reconnect the high−tension cord to ignition coil.
(g) Reconnect the high−tension cords to spark plugs.
3. INSPECT SPARK PLUGS
NOTICE:
Never use a wire brush for cleaning.
Never attempt to adjust the electrode gap on a used
spark plug.
Spark plugs should be replaced every 100,000 km
(60,000 miles).
(a) Disconnect the high−tension cords from the spark plugs.
(b) Using a megger (insulation resistance meter), measure
the insulation resistance.
Standard correct insulation resistance:
10 MΩ 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))
S05308
16mm Plug
Wrench
Z00032
IG0152
IG−4
− IGNITIONIGNITION SYSTEM
1996 RAV4 (RM447U)
(c) Using a 16 mm plug wrench, remove the 4 spark plugs.
(d) Visually check the spark plug for thread damage and insu-
lator damage.
If abnormal, replace the spark plug.
Recommended spark plug:
DENSOPK20R11
NGKBKR6EP−11
(e) Inspect the electrode gaps.
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 the used plug.
(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 4 spark plugs.
Torque: 18 N·m (180 kgf·cm, 13 ft·lbf)
(h) Reconnect the high−tension cords from the spark plugs.
4. INSPECT IGNITION COILS
(a) Disconnect the ignition coil connector.
(b) Disconnect the high−tension cord from ignition coil.
(c) Inspect the primary coil resistance.
Using an ohmmeter, measure the resistance between the
positive (+) and negative (−) terminals.
Primary coil resistance:
Cold0.36 − 0.55 Ω
Hot0.45 − 0.65 Ω
If the resistance is not as specified, replace the ignition coil.
