Ignition Coil Resistance (Sonata 2.5L)

Disconnect ignition coil 4-pin connector. Measure primary coil resistance for cylinders No. 1 and 4 between connector terminals No. 2 and 3. Measure primary coil resistance for cylinders No. 2 and 5 between connector terminals No. 1 and 3. Measure primary coil resistance for cylinders No. 3 and 6 between coil connector terminals No. 3 and 4. See Fig 4. Replace coil if resistance is not as specified. See DIS IGNITION COIL RESISTANCE table.
To check secondary coil resistance, disconnect spark plug wires. Measure resistance between high-voltage coil terminals No. 1 and 4, between terminals No. 2 and 5, and between terminals No. 3 and 6. See Fig 4. See DIS IGNITION COIL RESISTANCE table. Replace coil if resistance is not as specified.

DIS IGNITION COIL RESISTANCE - Ohms @ 68°F (20°C)

Application

Primary

Secondary

Accent, Elantra & Tiburon

0.45-0.55

10,300-13,900

Sonata

2.4L

⁽¹⁾ 0.78

20,000

2.5L

0.67-0.81

11,305-15,295

⁽¹⁾	Resistance value is with coil power transistor energized using a 3-volt power supply and ground connected to terminals No. 1 and 2. See Fig 3.

Fig 1: Testing Coil Power & Ground Circuits (Accent)