Ignition Coil Resistance

Disconnect wiring from ignition coil so ignition coil is isolated from the system. Using ohmmeter, check primary resistance between ignition coil positive (+) and negative (-) terminals. See Fig 1 & 6.
Check secondary resistance between ignition coil positive (+) terminal and high tension wire terminal (coil wire tower). See Fig 3 & 8. Replace ignition coil if resistance is not within specification. See appropriate IGNITION COIL RESISTANCE table.

V6 IGNITION COIL RESISTANCE - Ohms @ 68°F (20°C)

Application	Primary	Secondary
Camry	.21-.32	6400-10,700
Pickup & 4Runner	.30-.60	9000-15,000

Fig 1: Checking Ignition Coil Primary Resistance (Camry 3.0L)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Checking Ignition Coil Primary Resistance (P/U & 4Runner 3.0L)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Checking Ignition Coil Secondary Resistance (Camry 3.0L)

Fig 4: Checking Ignition Coil Secondary Resistance (P/U & 4Runner 3.0L)