All resistance values are given for a coil temperature of 21°C. Resistance will vary with temperature. Use common sense when interpreting the data.
ACCORD 1984-85 and PRELUDE 1984-86
1. Number the wires and disconnect them from the coil. The small outer terminals of the primary winding are marked on the coil with (+) and (-) symbols. The large terminals of the coil (from which the wires go to the distributor) are the terminals of the secondary winding.
2 With the ignition off, measure the resistance at the terminals of the primary winding. The resistance should be 1.06-1.24 Ohms.
3. Measure the resistance between the secondary winding terminal and the positive terminal of the primary winding; resistance should be 7400-11000 ohms.
4. If the resistance is not within specification, the coil must be replaced.
ACCORD 1986-89 and PRELUDE 198791
1. These vehicles use a 4-pin primary configuration. With the ignition off, disconnect the wires (label them) from the primary and secondary windings of the coil.
2. Measure the resistance between terminals A and D; resistance on the primary winding should be: on ACCORD 1886-89 and Prelude 1987-89: 1.2-1.5 Ohms; Prelude 1990-91: 0.3-0.4 Ohm.
3. Measure the resistance between terminal A and the terminal of the secondary winding. The resistance should be: on the ACCORD 1986-89 and on the Prelude 1987: 11074-11526 Ohms; Prelude 1988-91: 9040-13560 Ohms.
4. Check the resistance between terminals B and D; it should be around 2100-2300 Ohm for all the cars described.
5. Measure the resistance between terminals A and C. There should be continuity.
6. All specified conditions must be met; if any condition is not met, the coil must be replaced.
ACCORD 1990-91
1. The ignition coil is located inside the distributor. With the ignition off, remove the distributor cap.
2. Remove the screws holding the black/yellow and white/blue wires to the terminals. The black/yellow wire is connected to the (+) terminal of the primary winding, and the white/blue wire is connected to the (-).
3. Measure the resistance between the terminals. The resistance should be 0.6-0.8 Ohm.
4. Measure the resistance between the (+) primary winding and the secondary winding terminal. The resistance should be 12800-19200 Ohm.
5. All conditions must be met; if any condition is not met, the coil must be replaced.
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