Checking the ignition coil [Toyota Carina T190]

Note: The terms "cold" and "hot" state refer to the temperature of the windings:

• "cold" - from -10°C to +50°C
• "hot" - from +50°C to +100°C

These definitions are further retained also in relation to inductive coils of angular momentum sensors.

1. Check the resistance of the primary winding using an ohmmeter by connecting it to the ignition coil as shown in the figures.

4A-FE (until 08.1994), 3S-FE, 4S-FE

• in cold state - 0.36-0.55 Ohm
• when hot - 0.45-0.65 Ohm

4A-FE (from 08.1994), 5A-FE, 7A-FE

• in cold state - 1.11-1.75 Ohm
• when hot - 1.41-2.05 Ohm

2. Check the resistance of the secondary winding using an ohmmeter by connecting it to the ignition coil as shown in the figures.



(The original is this website ToyotaMAN)

• in a "cold" state - 9.0-15.7 kOhm
• in "hot" state - 11.4-18.4 kOhm

If the resistance of any of the ignition coil windings does not correspond to the nominal values, replace the ignition coil.

3. Using a megohmmeter, measure the resistance between the negative terminal of the ignition coil (-) and the terminal of the high-voltage wire!

• Nominal resistance - not less than 10 MOhm

Otherwise, replace the ignition coil.