Corolla Sport Coupe L4-1587cc 1.6L DOHC (4A-F) (1988)
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Igniter: Testing and Inspection
1.
On models equipped with external coil, ensure spark occurs as follows:
a. Disconnect coil wire at distributor.
b. Hold end of coil wire approximately 1/2 inch from vehicle body.
c. Crank engine and check for spark to occur. On fuel injected models, to prevent fuel from being injected during testing, limit cranking to
1---2 seconds.
d. If spark does not occur, proceed to step 3.
2.
On models equipped with internal coil, proceed as follows:
a. Disconnect spark plug wiring, then remove spark plugs.
b. Connect spark plug wiring to spark plugs.
c. Ground spark plugs, then while cranking engine, ensure spark jumps spark plug gap. On fuel injected models, to prevent fuel from being
injected during testing, limit cranking to 1-2 seconds.
d. If spark does not occur, proceed to step 3.
3.
Check ignition coil, igniter and distributor wiring connections. If connections are secure, proceed to step 4.
4.
Check spark plug wiring resistance values. Refer to Spark Plug Wire Resistance Test for procedure.
5.
Turn ignition switch ``On,'' then check for battery voltage at ignition coil positive (+) terminal. If battery voltage is not present, check wiring
between ignition switch to ignition coil and igniter and repair as necessary.
6.
Check resistance of ignition coil. Refer to Ignition Coil Test for procedure.
7.
Check distributor pick-up coil(s) resistance and pick-up coil(s) air gap. Refer to Pick-up Coil Test for procedure.
8.
On 3S-GE and 7M-GE engines, check IGt signal from ECU for approximately 1.0v. If approximately 1.0v is not present, check wiring between
ECU, distributor and igniter and replace as necessary. If wiring is satisfactory, replace ECU.
9.
On all models, if components tests performed in steps 3 through 8 were satisfactory and spark does not occur, replace igniter.
