Ignition Coil Secondary Resistance Check

On Corolla and Tercel, using an ohmmeter, measure resistance between coil positive terminal and coil tower. See Fig 1.
If resistance is not within specification, replace ignition coil. See IGNITION COIL RESISTANCE table. If resistance is within specification, proceed to Pick-up Coil Resistance test.
On Pickup, measure resistance between positive (Brown wire) and high-tension (coil) terminal. See Fig 2. If resistance is not within specification, replace ignition coil. See IGNITION COIL RESISTANCE table. If resistance is within specification, proceed to next step.
Measure coil insulation resistance between positive (Brown wire) and ignitor body ground ("GND"). See Fig 3. Ohmmeter should read infinity. If ohmmeter does not read infinity, replace ignition coil. If ohmmeter reading is okay, go to:
- for Corolla, see PICK-UP COIL RESISTANCE CHECK
- for Pickup, see PICK-UP COIL RESISTANCE CHECK

IGNITION COIL RESISTANCE

Application

⁽¹⁾ Primary Ohms

⁽¹⁾ Secondary Ohms

Corolla

1.3-1.5

10,200-13,800

Tercel

.40-.50

10,200-13,800

Pickup

.40-.50

8500-11,500

⁽¹⁾	Check at room temperature.

Fig 1: Testing Secondary Coil Resistance - Corolla & Tercel

Fig 2: Testing Secondary Coil Resistance - Pickup

Fig 3: Measuring Ignition Coil Insulation Resistance