Toyota 4A-FE Repair Manual page 200

IG-6 IGNITION SYSTEM - On-Vehicle Inspection (4A-FE)
SPARK TEST
I
NO
CHECK RESISTANCE OF HIGH-TENSION
CORDS (See page IG-7)
Maximum resistance:
25 kO per cord
j
OK
ON-VEHICLE INSPECTION (4A-FE)
SPARK TEST
CHECK THAT SPARK OCCURS
(a)
Disconnect high-tension cords from spark plugs.
(b) Remove the spark plugs. (See page IG- 7)
(c)
Install the spark plugs to each high-tension cord.
(d) Ground the spark plug.
(e) Check if spark occurs while engine is being cranked.
HINT: 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.
BAD
Replace the cords.
CHECK POWER SUPPLY TO IGNITION COIL Check wiring between ignition switch
1. Ignition switch turn to ON.
BAD
to ignition coil.
2. Check that there is battery voltage at ignition
coil positive (+) terminal.
I
OK
CHECK RESISTANCE OF IGNITION COIL
Replace the ignition coil.
(See page IG-8)
Resistance (cold):
BAD
Primary
2WD
1.28 - 1.s6
n
-
4WD o.38 - o.46
n
Secondary 2WD 10.4 - 14.0 kfl
4WD 7.7 - 10.3 kfi
I
OK
CHECK RESISTANCE OF SIGNAL GENERATOR
Replace the
llA
housing.
(PICKUP COIL)
BAD
(See page IG-9)
Resistance: 140 - 180 kO
I
OK
CHECK AIR GAP OF DISTRIBUTOR
BAD
Replace the llA housing.
-
Air Gap: Each 0.2 mm (0.008 in.) or more
I
OK
-;:.-
CHECK IGT SIGNAL FROM ECU
BAD
.:..
Check wiring between ECU and
(See page Fl-48, 62)
llA, only then try another ECU.
I
OK
TRY ANOTHER IGNITER