Ignition Systems: Overview

Overview
The Ignition System is designed to ignite the compressed air/fuel mixture in an internal combustion engine by a high voltage spark from an ignition coil. The ignition system also provides engine timing information to the Powertrain Control Module (PCM) for proper vehicle operation and misfire detection.

The engines are equipped with a coil on plug ignition system. This system has a separate ignition coil mounted on each spark plug. Operation of the coils is controlled by the Powertrain Control Module (PCM), which computes ignition timing based on inputs from the electronic engine control system sensors. For additional information on sensor inputs related to ignition control; refer to Computer and Control Systems.

The ignition coils change the low voltage signal from the powertrain control module into high voltage pulses to the spark plugs.

The ignition system is set for base timing at 10 degrees Before Top Dead Center (BTDC) and is not adjustable.

The ignition system is set for base timing at 10 degrees before top dead center (BTDC) and is not adjustable.

Refer to Specifications for firing order.