What are the symptoms of a bad ignition control module?
Signs of a Bad Ignition Module
- Acceleration Issues. The vehicle may shake, vibrate or jerk when the gas pedal is pressed. There may be hesitation or lack of power during increases in speed.
- Temperature Problems. A faulty ignition module can cause a vehicle to overheat.
- No Power. The engine may turn over without starting.
Where is the ignition switch module located?
Typically the Ignition Control Module is located inside of the distributor housing or mounted on the side of the engine compartment.
How do you check an ignition module?
Connect the ground lead from the 12-volt test light to the negative terminal on the ignition coil. Have your partner crank the engine over several times. Your test light should flicker on and off. If so, your module is working properly and no further testing is necessary.
What triggers or controls the ignition module?
The ignition module contains the closed-loop primary current control circuit and the dwell-angle control. A pulse generator provides correctly timed electrical pulses for the amplifier to trigger the ignition by switching off the coil negative terminal.
How do you replace an ignition control module?
Reach under the engine and unplug the coil assembly electrical connectors. Remove the assembly mounting bolts using a ratchet and socket. Remove the assembly from the engine and remove the coils using a ratchet and socket. Remove the old ignition module from the base plate and install the new unit.
What does an ignition control module do?
The ignition control module (ICM) gathers information from a triggering device (usually the crankshaft position sensor or camshaft position sensor) to determine your vehicle’s base ignition timing. Correct ignition timing is crucial because it plays a major role in your engine’s performance and health.