Ignition System On-Vehicle Inspection - Toyota T100 1996 Service Manual

IGNITION SYSTEM
ON−VEHICLE INSPECTION
NOTICE:
"Cold" and "Hot" in the following sentences express the temperature of the coils themselves. "Cold" is from
−10°C (14°F) to 50°C (122°F) and "Hot" is from 50°C (122°F) to 100°C (212°F).
1. INSPECT IGNITOR AND SPARK TEST
Check that the spark occurs.
(1) Disconnect the high−tension cords from the spark plugs.
(2) Remove the spark plugs.
(3) Install the spark plugs to each high−tension cord.
(4) Ground the spark plug.
(5) Check if spark occurs while engine is being cranked.
NOTICE:
To prevent gasoline from being injected from injectors during this test, crank the engine for no more than 1
− 2 seconds at a time.
If the spark does not occur, perform the test as follows:
SPARK TEST
NO
CHECK CONNECTION OF IGNITION COIL AND
IGNITER AND DISTRIBUTOR CONNECTOR
OK
CHECK RESISTANCE OF HIGH−TENSION
CORD (See step 2.)
Maximum resistance; 25 kΩ per cord
OK
CHECK POWER SUPPLY TO IGNITION COIL
AND IGNITER
1. Turn ignition switch to ON.
2. Check that there is battery voltage at
ignition coil positive (+) terminal.
OK
CHECK RESISTANCE OF IGNITION COIL (See step 4)
Resistance:
0.36 − 0.55 Ω
Primary
Secondary
OK
CHECK RESISTANCE OF SIGNAL
GENERATOR (PICKUP COIL)
(See step 5)
Resistance:
G and G 185 − 275 Ω
OK
CHECK RESISTANCE OF CRANKSHAFT
POSITION SENSOR
(See page IG−14)
Resistance:
NE and NE 1,630 − 2,740 Ω
OK
CHECK AIR GAP OF DISTRIBUTOR (See page DI−103)
Air gap: 0.2 − 0.4 mm (0.008 − 0.016 in.)
OK
CHECK IGT SIGNAL FROM ECM
(See page DI−103)
TRY ANOTHER IGNITER
1996 TOYOTA T100 (RM449U)
IGNITION (3RZ−FE)
Cold Hot
0.45 − 0.65 Ω
9.0 − 15.4 kΩ 11.4 − 18.1 kΩ
Cold Hot
240 − 325 Ω
Cold
2,065 − 3,225 Ω
− IGNITION SYSTEM
BAD
BAD
BAD
BAD
BAD
Hot BAD
BAD
BAD
Author :
Connect securely.
Replace the cord(s).
Check wiring between ignition switch
to ignition coil and igniter.
Replace the ignition coil.
Replace the distributor housing as-
sembly.
Replace the crankshaft position sensor.
Replace the distributor housing assembly.
Check wiring between ECM, distributor
and igniter, and then try another ECM.
Date :
IG−1
IG0L9−01
1141