B Series Truck 2WD L4-2184cc 2.2L 2200 2-bbl (1990)
Ignition Coil: Testing and Inspection
SPARK TEST
CAUTION:To reduce the hazard of fire or explosion, ensure that no fuel leaks exist before conducting this test. Do not check for spark near the battery.
1.
Disconnect ignition coil lead from distributor.
2.
With insulated pliers, hold end approximately 0.20 - 0.39 in (5 - 10 mm) from ground and crank engine.
3.
Verify that a strong blue spark jumps the gap.
4.
If there is no spark, check for battery voltage at the coil positive terminal with ignition switch "ON."
5.
If there is no voltage, check main fuse, ignition switch. Repair the problem as required.
RESISTANCE CHECK
Ignition Coil Resistance Check
1.
Check primary resistance across positive and negative coil terminals. At 68°F (20°C), it should be 1.0 - 1.3 ohms.
2.
Check secondary resistance between primary positive terminal and ignition wire terminal. At 68°F (20°C), it should be 6 - 30K ohms.
3.
Check insulation resistance between either primary terminal and coil case. It should be 10M ohms or higher.
4.
Replace coil if it does not test as specified.
